Merge pull request 'dev' (#5) from dev into master

Reviewed-on: #5

.gitea/workflows/build.yml

@@ -94,16 +94,17 @@ jobs:
           test "${REMOTE}" = "${LOCAL}"
 
   build-android-apk:
-    runs-on: ubuntu-latest
+    runs-on: android-builder
     container:
       image: reactnativecommunity/react-native-android:latest
     env:
-      GRADLE_OPTS: "-Dorg.gradle.daemon=false -Dorg.gradle.parallel=false -Dorg.gradle.workers.max=1 -Xmx2g -XX:MaxMetaspaceSize=512m -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:ReservedCodeCacheSize=128m"
-      _JAVA_OPTIONS: "-Xmx2g -XX:MaxMetaspaceSize=512m -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:ReservedCodeCacheSize=128m"
-      NODE_OPTIONS: "--max-old-space-size=2048"
+      GRADLE_OPTS: "-Dorg.gradle.daemon=false -Dorg.gradle.parallel=true -Dorg.gradle.workers.max=4 -Xmx8g -XX:MaxMetaspaceSize=1g -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:ReservedCodeCacheSize=512m"
+      _JAVA_OPTIONS: "-Xmx8g -XX:MaxMetaspaceSize=1g -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:ReservedCodeCacheSize=512m"
+      NODE_OPTIONS: "--max-old-space-size=8192"
       NODE_ENV: "production"
-      NDK_NUM_JOBS: "1"
-      CMAKE_BUILD_PARALLEL_LEVEL: "1"
+      NDK_NUM_JOBS: "4"
+      CMAKE_BUILD_PARALLEL_LEVEL: "4"
+      GRADLE_USER_HOME: /root/.gradle
     permissions:
       contents: read
     steps:
@@ -122,7 +123,28 @@ jobs:
           node-version: '25.6.1'
           cache: 'npm'
 
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+            ~/.android/build-cache
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties', '**/gradle.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Cache node_modules
+        uses: actions/cache@v4
+        id: cache-node-modules
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-node-modules-${{ hashFiles('package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-modules-
+
       - name: Install dependencies
+        if: steps.cache-node-modules.outputs.cache-hit != 'true'
         run: npm ci
 
       - name: Generate Android native project
@@ -222,10 +244,10 @@ jobs:
           # Update gradle.properties
           cat > gradle.properties << 'PROPS_EOF'
           org.gradle.daemon=false
-          org.gradle.parallel=false
-          org.gradle.configureondemand=false
-          org.gradle.workers.max=1
-          org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=512m -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:ReservedCodeCacheSize=128m -XX:+HeapDumpOnOutOfMemoryError
+          org.gradle.parallel=true
+          org.gradle.configureondemand=true
+          org.gradle.workers.max=4
+          org.gradle.jvmargs=-Xmx8g -XX:MaxMetaspaceSize=1g -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
           android.enableJetifier=false
           android.useAndroidX=true
           hermesEnabled=true
@@ -242,7 +264,7 @@ jobs:
         run: |
           cd android
           chmod +x gradlew
-          ./gradlew :app:assembleRelease -PreactNativeArchitectures=arm64-v8a --max-workers=1
+          ./gradlew :app:assembleRelease -PreactNativeArchitectures=arm64-v8a --max-workers=4 --parallel
 
       - name: Upload APK artifact
         uses: actions/upload-artifact@v3
@@ -292,6 +314,8 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           platforms: linux/amd64
           provenance: false
+          cache-from: type=registry,ref=code.littlelan.cn/carrot_bbs/frontend-web:buildcache
+          cache-to: type=registry,ref=code.littlelan.cn/carrot_bbs/frontend-web:buildcache,mode=max
 
       - name: Show image tags
         run: |

.gitignore

@@ -51,3 +51,6 @@ dist-android-update.zip
 # Backend
 backend/data/
 backend/logs/
+
+doc/
+docs/

ARCHITECTURE_REFACTOR_PLAN.md

@@ -0,0 +1,231 @@
+# 架构修复方案文档
+
+## 1. 重构目标
+
+### 1.1 核心原则
+- **单一职责**：每个模块只负责一个明确的功能
+- **依赖倒置**：高层模块不依赖低层模块，都依赖抽象
+- **开闭原则**：对扩展开放，对修改关闭
+
+### 1.2 目标架构
+```
+src/
+├── core/                    # 核心业务逻辑（框架无关）
+│   ├── entities/           # 业务实体
+│   ├── repositories/       # 仓库接口
+│   └── usecases/          # 业务用例
+├── data/                   # 数据层
+│   ├── datasources/       # 数据源实现（API、DB、Cache）
+│   ├── repositories/      # 仓库实现
+│   └── mappers/          # 数据映射
+├── presentation/          # 表现层
+│   ├── components/       # UI组件
+│   ├── screens/         # 屏幕组件
+│   ├── stores/          # 状态管理
+│   └── hooks/           # 自定义hooks
+└── infrastructure/      # 基础设施
+    ├── navigation/      # 导航
+    ├── theme/          # 主题
+    └── services/       # 外部服务
+```
+
+## 2. 具体修复方案
+
+### 2.1 messageManager.ts 重构方案
+
+#### 现状问题
+- 1500+行，上帝对象
+- 混合了 WebSocket、数据库、状态管理、UI通知
+- 与SQLite深度耦合
+
+#### 目标结构
+```
+src/data/
+├── datasources/
+│   ├── WebSocketClient.ts      # WebSocket连接管理
+│   └── MessageDataSource.ts    # 消息数据源
+├── repositories/
+│   └── MessageRepository.ts    # 消息仓库实现
+└── mappers/
+    └── MessageMapper.ts        # 消息数据映射
+
+src/core/
+├── entities/
+│   └── Message.ts              # 消息实体
+├── repositories/
+│   └── IMessageRepository.ts   # 仓库接口
+└── usecases/
+    ├── ProcessMessageUseCase.ts
+    ├── SyncMessagesUseCase.ts
+    └── UpdateReadReceiptUseCase.ts
+
+src/presentation/stores/
+└── messageStore.ts             # 简化的消息状态管理
+```
+
+#### 重构步骤
+1. 提取 WebSocketClient - 纯连接管理
+2. 创建 MessageRepository - 数据访问抽象
+3. 创建 UseCases - 业务逻辑
+4. 重写 messageStore - 仅负责UI状态
+5. 删除旧的 messageManager.ts
+
+### 2.2 乐观更新工具函数方案
+
+#### 现状问题
+- userStore.ts 中重复6+次相同模式
+- 代码冗余，难以维护
+
+#### 目标API
+```typescript
+// utils/optimisticUpdate.ts
+export interface OptimisticUpdateOptions<T, R> {
+  store: StoreApi<any>;
+  getCurrentState: () => T;
+  optimisticUpdate: (current: T) => T;
+  apiCall: () => Promise<R>;
+  onSuccess?: (result: R, current: T) => T;
+  onError?: (error: any, original: T) => void;
+}
+
+export async function optimisticUpdate<T, R>(
+  options: OptimisticUpdateOptions<T, R>
+): Promise<R>
+```
+
+#### 使用示例
+```typescript
+// 重构前（重复代码）
+set(state => ({ posts: updatedPosts }));
+try {
+  const result = await postService.like(postId);
+  // ...
+} catch (error) {
+  set(state => ({ posts: originalPosts }));
+}
+
+// 重构后（简洁）
+await optimisticUpdate({
+  store,
+  getCurrentState: () => store.getState().posts,
+  optimisticUpdate: (posts) => updatePostLikes(posts, postId, true),
+  apiCall: () => postService.like(postId),
+  onSuccess: (result, posts) => updatePostWithServerData(posts, result),
+});
+```
+
+### 2.3 useResponsive.ts 拆分方案
+
+#### 现状问题
+- 485行，43个导出
+- 功能混杂：断点检测、响应式值计算、平台检测
+
+#### 目标结构
+```
+src/presentation/hooks/responsive/
+├── useBreakpoint.ts           # 断点检测
+├── useResponsiveValue.ts      # 响应式值映射
+├── useOrientation.ts          # 方向检测
+├── usePlatform.ts            # 平台检测
+├── useScreenSize.ts          # 屏幕尺寸
+└── index.ts                  # 统一导出
+```
+
+#### 各Hook职责
+- `useBreakpoint`: 返回当前断点 (mobile/tablet/desktop/wide)
+- `useResponsiveValue`: 根据断点返回不同值
+- `useOrientation`: 返回 portrait/landscape
+- `usePlatform`: 返回 ios/android/web
+- `useScreenSize`: 返回 width/height
+
+### 2.4 MainNavigator 解耦方案
+
+#### 现状问题
+- 1118行，直接依赖store
+- 混合了导航配置和业务逻辑
+
+#### 目标结构
+```
+src/infrastructure/navigation/
+├── MainNavigator.tsx         # 简化后的导航器
+├── AuthNavigator.tsx         # 认证导航
+├── TabNavigator.tsx          # 标签导航
+├── navigationService.ts      # 导航服务（解耦层）
+├── navigationTypes.ts        # 类型定义
+└── hooks/
+    └── useNavigationState.ts # 导航状态hook
+```
+
+#### 解耦策略
+1. 创建 NavigationService - 提供导航操作的抽象
+2. Store通过NavigationService触发导航，而非直接操作
+3. MainNavigator只负责渲染，不处理业务逻辑
+
+### 2.5 Repository 层创建方案
+
+#### 现状问题
+- 服务层直接操作数据库
+- 没有明确的数据访问边界
+
+#### 目标结构
+```
+src/data/repositories/
+├── MessageRepository.ts      # 消息数据访问
+├── PostRepository.ts        # 帖子数据访问
+├── UserRepository.ts        # 用户数据访问
+└── interfaces/
+    ├── IMessageRepository.ts
+    ├── IPostRepository.ts
+    └── IUserRepository.ts
+```
+
+#### 职责划分
+- **Repository**: 数据访问抽象，定义接口
+- **DataSource**: 具体数据源实现（API、SQLite、Cache）
+- **Service**: 业务逻辑编排，使用Repository
+
+## 3. 实施计划
+
+### 阶段1：基础设施（第1-2天）
+- [ ] 创建目录结构
+- [ ] 实现乐观更新工具函数
+- [ ] 拆分 useResponsive hooks
+
+### 阶段2：数据层重构（第3-5天）
+- [ ] 创建 Repository 接口和实现
+- [ ] 创建 DataSource 层
+- [ ] 迁移数据库操作到 Repository
+
+### 阶段3：核心业务重构（第6-10天）
+- [ ] 重构 messageManager → UseCases + Store
+- [ ] 创建 WebSocketClient
+- [ ] 实现消息同步逻辑
+
+### 阶段4：表现层重构（第11-12天）
+- [ ] 解耦 MainNavigator
+- [ ] 重构 userStore 使用乐观更新工具
+- [ ] 更新所有屏幕组件
+
+### 阶段5：测试与优化（第13-14天）
+- [ ] 单元测试
+- [ ] 集成测试
+- [ ] 性能优化
+
+## 4. 风险与应对
+
+| 风险 | 影响 | 应对措施 |
+|-----|------|---------|
+| 重构引入bug | 高 | 每个模块重构后必须测试，保持API兼容 |
+| 开发时间超期 | 中 | 分阶段交付，优先核心功能 |
+| 团队成员不熟悉新架构 | 中 | 编写详细文档，代码审查 |
+| 性能下降 | 低 | 添加性能监控，及时优化 |
+
+## 5. 验收标准
+
+- [ ] messageManager.ts 被删除，功能拆分到多个小模块
+- [ ] userStore.ts 中无重复乐观更新代码
+- [ ] useResponsive.ts 拆分为5+个专注hook
+- [ ] MainNavigator.tsx 行数 < 300
+- [ ] 所有单元测试通过
+- [ ] 无TypeScript错误
+- [ ] 性能不劣化（启动时间、内存占用）

App.tsx

@@ -1,137 +1,7 @@
 /**
- * 萝卜BBS - 主应用入口
- * 配置导航、主题、状态管理等
+ * 应用入口已由 Expo Router 接管（package.json main: expo-router/entry）。
+ * 全局 Provider 与根布局见 app/_layout.tsx。
  */
-
-import React, { useEffect, useRef } from 'react';
-import { AppState, AppStateStatus, Platform, StyleSheet } from 'react-native';
-import { StatusBar } from 'expo-status-bar';
-import { GestureHandlerRootView } from 'react-native-gesture-handler';
-import { SafeAreaProvider } from 'react-native-safe-area-context';
-import { PaperProvider } from 'react-native-paper';
-import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
-import * as Notifications from 'expo-notifications';
-
-// 配置通知处理器 - 必须在应用启动时设置
-Notifications.setNotificationHandler({
-  handleNotification: async () => ({
-    shouldShowAlert: true,       // 即使在后台也要显示通知
-    shouldPlaySound: true,       // 播放声音
-    shouldSetBadge: true,        // 设置角标
-    shouldShowBanner: true,      // 显示横幅
-    shouldShowList: true,        // 显示通知列表
-  }),
-});
-
-import MainNavigator from './src/navigation/MainNavigator';
-import { paperTheme } from './src/theme';
-import AppPromptBar from './src/components/common/AppPromptBar';
-import AppDialogHost from './src/components/common/AppDialogHost';
-import { installAlertOverride } from './src/services/alertOverride';
-// 数据库初始化移到 authStore 中，根据用户ID创建用户专属数据库
-
-// 创建 QueryClient 实例
-const queryClient = new QueryClient({
-  defaultOptions: {
-    queries: {
-      retry: 2,
-      staleTime: 5 * 60 * 1000, // 5分钟
-    },
-  },
-});
-
-installAlertOverride();
-
-// 注入全局CSS来移除React Native Web在浏览器中的默认focus outline
-if (Platform.OS === 'web') {
-  const style = document.createElement('style');
-  style.textContent = `
-    /* 移除TextInput focus时的浏览器默认outline */
-    input:focus, textarea:focus, select:focus {
-      outline: none !important;
-      outline-width: 0 !important;
-      box-shadow: none !important;
-    }
-    
-    /* 移除focus-visible时的默认outline */
-    input:focus-visible, textarea:focus-visible {
-      outline: none !important;
-    }
-    
-    /* 移除所有:focus相关的默认样式 */
-    *:focus {
-      outline: none !important;
-    }
-    
-    *:focus-visible {
-      outline: none !important;
-    }
-  `;
-  document.head.appendChild(style);
-}
-
 export default function App() {
-  const appState = useRef<AppStateStatus>(AppState.currentState);
-  const notificationResponseListener = useRef<Notifications.EventSubscription | null>(null);
-
-  // 系统通知功能初始化
-  useEffect(() => {
-    const initNotifications = async () => {
-      const { systemNotificationService } = await import('./src/services/systemNotificationService');
-      await systemNotificationService.initialize();
-      
-      // 初始化后台保活服务
-      const { initBackgroundService } = await import('./src/services/backgroundService');
-      await initBackgroundService();
-      
-      // 监听 App 状态变化
-      const subscription = AppState.addEventListener('change', (nextAppState) => {
-        if (
-          appState.current.match(/inactive|background/) &&
-          nextAppState === 'active'
-        ) {
-          systemNotificationService.clearBadge();
-        }
-        appState.current = nextAppState;
-      });
-
-      // 监听通知点击响应
-      notificationResponseListener.current = Notifications.addNotificationResponseReceivedListener(
-        (response) => {
-          const data = response.notification.request.content.data;
-          void data;
-        }
-      );
-      
-      // 监听通知到达（用于前台显示时额外处理）
-      const notificationReceivedSubscription = Notifications.addNotificationReceivedListener(
-        (notification) => {
-          void notification;
-        }
-      );
-
-      return () => {
-        subscription.remove();
-        notificationResponseListener.current?.remove();
-        notificationReceivedSubscription.remove();
-      };
-    };
-
-    initNotifications();
-  }, []);
-
-  return (
-    <GestureHandlerRootView style={{ flex: 1 }}>
-      <SafeAreaProvider>
-        <PaperProvider theme={paperTheme}>
-          <QueryClientProvider client={queryClient}>
-            <StatusBar style="light" />
-            <MainNavigator />
-            <AppPromptBar />
-            <AppDialogHost />
-          </QueryClientProvider>
-        </PaperProvider>
-      </SafeAreaProvider>
-    </GestureHandlerRootView>
-  );
+  return null;
 }

app.json

@@ -2,10 +2,11 @@
   "expo": {
     "name": "萝卜社区",
     "slug": "qojo",
-    "version": "1.0.10",
+    "version": "1.0.11",
     "orientation": "default",
     "icon": "./assets/icon.png",
-    "userInterfaceStyle": "light",
+    "userInterfaceStyle": "automatic",
+    "scheme": "carrotbbs",
     "splash": {
       "image": "./assets/splash-icon.png",
       "resizeMode": "contain",
@@ -33,7 +34,7 @@
       },
       "predictiveBackGestureEnabled": false,
       "package": "skin.carrot.bbs",
-      "versionCode": 5,
+      "versionCode": 6,
       "permissions": [
         "VIBRATE",
         "RECEIVE_BOOT_COMPLETED",
@@ -68,6 +69,12 @@
         }
       ],
       "expo-sqlite",
+      [
+        "expo-camera",
+        {
+          "cameraPermission": "允许萝卜社区访问您的相机以扫描二维码"
+        }
+      ],
       [
         "expo-notifications",
         {

app/(app)/(tabs)/_layout.tsx

@@ -0,0 +1,127 @@
+import { useMemo } from 'react';
+import { Platform, useWindowDimensions } from 'react-native';
+import { Tabs, usePathname } from 'expo-router';
+import { MaterialCommunityIcons } from '@expo/vector-icons';
+import { useSafeAreaInsets } from 'react-native-safe-area-context';
+
+import { useAppColors, shadows } from '../../../src/theme';
+import { BREAKPOINTS } from '../../../src/hooks/useResponsive';
+import { useHomeTabBarVisibilityStore, useTotalUnreadCount } from '../../../src/stores';
+
+const TAB_BAR_HEIGHT = 56;
+const TAB_BAR_FLOATING_MARGIN = 12;
+const TAB_BAR_MARGIN = 20;
+
+export default function TabsLayout() {
+  const colors = useAppColors();
+  const { width } = useWindowDimensions();
+  const insets = useSafeAreaInsets();
+  const pathname = usePathname();
+  const unreadCount = useTotalUnreadCount();
+  const scrollHideTabBar = useHomeTabBarVisibilityStore((s) => s.bottomTabBarHiddenByScroll);
+  const hideTabBar = Platform.OS === 'web' && width >= BREAKPOINTS.desktop;
+
+  const isHomeStackRoute = pathname === '/home' || pathname.startsWith('/home/');
+
+  const tabBarStyle = useMemo(() => {
+    if (hideTabBar) {
+      return { display: 'none' as const, height: 0, overflow: 'hidden' as const };
+    }
+    const visibleStyle = {
+      position: 'absolute' as const,
+      left: 0,
+      right: 0,
+      marginHorizontal: TAB_BAR_MARGIN,
+      bottom: TAB_BAR_FLOATING_MARGIN + insets.bottom,
+      height: TAB_BAR_HEIGHT,
+      borderRadius: 22,
+      backgroundColor: colors.background.paper,
+      ...shadows.lg,
+      borderTopWidth: 0,
+      elevation: 100,
+      zIndex: 100,
+    };
+    if (isHomeStackRoute && scrollHideTabBar) {
+      return {
+        ...visibleStyle,
+        display: 'none' as const,
+        height: 0,
+        opacity: 0,
+        overflow: 'hidden' as const,
+      };
+    }
+    return visibleStyle;
+  }, [hideTabBar, insets.bottom, isHomeStackRoute, scrollHideTabBar, colors]);
+
+  return (
+    <Tabs
+      screenOptions={{
+        headerShown: false,
+        tabBarActiveTintColor: colors.primary.main,
+        tabBarInactiveTintColor: colors.text.secondary,
+        tabBarStyle,
+        tabBarItemStyle: {
+          borderRadius: 16,
+          marginHorizontal: 2,
+          paddingVertical: 1,
+        },
+        tabBarShowLabel: true,
+        tabBarLabelStyle: { fontSize: 11, fontWeight: '600', marginTop: -1 },
+      }}
+    >
+      <Tabs.Screen
+        name="home"
+        options={{
+          title: '首页',
+          tabBarIcon: ({ color, focused }) => (
+            <MaterialCommunityIcons
+              name={focused ? 'home' : 'home-outline'}
+              size={focused ? 24 : 22}
+              color={color}
+            />
+          ),
+        }}
+      />
+      <Tabs.Screen
+        name="apps"
+        options={{
+          title: '应用',
+          tabBarIcon: ({ color, focused }) => (
+            <MaterialCommunityIcons
+              name={focused ? 'view-grid' : 'view-grid-outline'}
+              size={focused ? 24 : 22}
+              color={color}
+            />
+          ),
+        }}
+      />
+      <Tabs.Screen
+        name="messages"
+        options={{
+          title: '消息',
+          tabBarBadge: unreadCount > 0 ? (unreadCount > 99 ? 99 : unreadCount) : undefined,
+          tabBarIcon: ({ color, focused }) => (
+            <MaterialCommunityIcons
+              name={focused ? 'message-text' : 'message-text-outline'}
+              size={focused ? 24 : 22}
+              color={color}
+            />
+          ),
+        }}
+      />
+      <Tabs.Screen
+        name="profile"
+        options={{
+          title: '我的',
+          tabBarIcon: ({ color, focused }) => (
+            <MaterialCommunityIcons
+              name={focused ? 'account' : 'account-outline'}
+              size={focused ? 24 : 22}
+              color={color}
+            />
+          ),
+        }}
+      />
+    </Tabs>
+  );
+}

app/(app)/(tabs)/apps/_layout.tsx

@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function AppsStackLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}

app/(app)/(tabs)/apps/index.tsx

@@ -0,0 +1,5 @@
+import { AppsScreen } from '../../../../src/screens/apps';
+
+export default function AppsRoute() {
+  return <AppsScreen />;
+}

app/(app)/(tabs)/apps/schedule/_layout.tsx

@@ -0,0 +1,17 @@
+import { Stack } from 'expo-router';
+
+export default function ScheduleStackLayout() {
+  return (
+    <Stack screenOptions={{ headerShown: false }}>
+      <Stack.Screen name="index" />
+      <Stack.Screen
+        name="course"
+        options={{
+          headerShown: false,
+          presentation: 'transparentModal',
+          animation: 'fade',
+        }}
+      />
+    </Stack>
+  );
+}

app/(app)/(tabs)/apps/schedule/course.tsx

@@ -0,0 +1,5 @@
+import { CourseDetailScreen } from '../../../../../src/screens/schedule';
+
+export default function CourseDetailRoute() {
+  return <CourseDetailScreen />;
+}

app/(app)/(tabs)/apps/schedule/index.tsx

@@ -0,0 +1,5 @@
+import { ScheduleScreen } from '../../../../../src/screens/schedule';
+
+export default function ScheduleRoute() {
+  return <ScheduleScreen />;
+}

app/(app)/(tabs)/home/_layout.tsx

@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function HomeStackLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}

app/(app)/(tabs)/home/index.tsx

@@ -0,0 +1,5 @@
+import { HomeScreen } from '../../../../src/screens/home';
+
+export default function HomeRoute() {
+  return <HomeScreen />;
+}

app/(app)/(tabs)/home/search.tsx

@@ -0,0 +1,5 @@
+import { SearchScreen } from '../../../../src/screens/home';
+
+export default function HomeSearchRoute() {
+  return <SearchScreen />;
+}

app/(app)/(tabs)/messages/_layout.tsx

@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function MessagesStackLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}

app/(app)/(tabs)/messages/index.tsx

@@ -0,0 +1,5 @@
+import { MessageListScreen } from '../../../../src/screens/message';
+
+export default function MessagesRoute() {
+  return <MessageListScreen />;
+}

app/(app)/(tabs)/messages/notifications.tsx

@@ -0,0 +1,5 @@
+import { NotificationsScreen } from '../../../../src/screens/message';
+
+export default function NotificationsRoute() {
+  return <NotificationsScreen />;
+}

app/(app)/(tabs)/profile/_layout.tsx

@@ -0,0 +1,41 @@
+import { useMemo } from 'react';
+import { Stack } from 'expo-router';
+import { useRouter } from 'expo-router';
+
+import { AppBackButton } from '../../../../src/components/common';
+import { useAppColors } from '../../../../src/theme';
+
+export default function ProfileStackLayout() {
+  const router = useRouter();
+  const colors = useAppColors();
+
+  const headerOptions = useMemo(
+    () => ({
+      headerStyle: { backgroundColor: colors.background.paper },
+      headerTintColor: colors.text.primary,
+      headerTitleStyle: { fontWeight: '600' as const },
+      headerShadowVisible: false,
+      headerBackTitle: '',
+    }),
+    [colors]
+  );
+
+  return (
+    <Stack
+      screenOptions={{
+        ...headerOptions,
+        headerBackVisible: false,
+        headerLeft: () => <AppBackButton onPress={() => router.back()} />,
+      }}
+    >
+      <Stack.Screen name="index" options={{ headerShown: false }} />
+      <Stack.Screen name="settings" options={{ headerShown: true, title: '设置' }} />
+      <Stack.Screen name="edit-profile" options={{ title: '编辑资料' }} />
+      <Stack.Screen name="account-security" options={{ title: '账号安全' }} />
+      <Stack.Screen name="my-posts" options={{ title: '我的帖子' }} />
+      <Stack.Screen name="bookmarks" options={{ title: '收藏' }} />
+      <Stack.Screen name="notification-settings" options={{ title: '通知设置' }} />
+      <Stack.Screen name="blocked-users" options={{ title: '黑名单' }} />
+    </Stack>
+  );
+}

app/(app)/(tabs)/profile/account-security.tsx

@@ -0,0 +1,5 @@
+import { AccountSecurityScreen } from '../../../../src/screens/profile';
+
+export default function AccountSecurityRoute() {
+  return <AccountSecurityScreen />;
+}

app/(app)/(tabs)/profile/blocked-users.tsx

@@ -0,0 +1,5 @@
+import { BlockedUsersScreen } from '../../../../src/screens/profile';
+
+export default function BlockedUsersRoute() {
+  return <BlockedUsersScreen />;
+}

app/(app)/(tabs)/profile/bookmarks.tsx

@@ -0,0 +1,5 @@
+import { ProfileScreen } from '../../../../src/screens/profile';
+
+export default function BookmarksRoute() {
+  return <ProfileScreen />;
+}

app/(app)/(tabs)/profile/edit-profile.tsx

@@ -0,0 +1,5 @@
+import { EditProfileScreen } from '../../../../src/screens/profile';
+
+export default function EditProfileRoute() {
+  return <EditProfileScreen />;
+}

app/(app)/(tabs)/profile/index.tsx

@@ -0,0 +1,5 @@
+import { ProfileScreen } from '../../../../src/screens/profile';
+
+export default function ProfileRoute() {
+  return <ProfileScreen />;
+}

app/(app)/(tabs)/profile/my-posts.tsx

@@ -0,0 +1,5 @@
+import { ProfileScreen } from '../../../../src/screens/profile';
+
+export default function MyPostsRoute() {
+  return <ProfileScreen />;
+}

app/(app)/(tabs)/profile/notification-settings.tsx

@@ -0,0 +1,5 @@
+import { NotificationSettingsScreen } from '../../../../src/screens/profile';
+
+export default function NotificationSettingsRoute() {
+  return <NotificationSettingsScreen />;
+}

app/(app)/(tabs)/profile/settings.tsx

@@ -0,0 +1,5 @@
+import { SettingsScreen } from '../../../../src/screens/profile';
+
+export default function SettingsRoute() {
+  return <SettingsScreen />;
+}

app/(app)/_layout.tsx

@@ -0,0 +1,19 @@
+import { useEffect } from 'react';
+import { Redirect } from 'expo-router';
+
+import { AppRouteStack } from '../../src/app-navigation/AppRouteStack';
+import { messageManager, useAuthStore } from '../../src/stores';
+
+export default function AppLayout() {
+  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
+
+  useEffect(() => {
+    messageManager.initialize();
+  }, []);
+
+  if (!isAuthenticated) {
+    return <Redirect href="/login" />;
+  }
+
+  return <AppRouteStack />;
+}

app/(app)/_layout.web.tsx

@@ -0,0 +1,28 @@
+import { useEffect } from 'react';
+import { useWindowDimensions } from 'react-native';
+import { Redirect } from 'expo-router';
+
+import { AppDesktopShell } from '../../src/app-navigation/AppDesktopShell';
+import { AppRouteStack } from '../../src/app-navigation/AppRouteStack';
+import { BREAKPOINTS } from '../../src/hooks/useResponsive';
+import { messageManager, useAuthStore } from '../../src/stores';
+
+export default function AppLayoutWeb() {
+  const { width } = useWindowDimensions();
+  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
+  const useDesktopShell = width >= BREAKPOINTS.desktop;
+
+  useEffect(() => {
+    messageManager.initialize();
+  }, []);
+
+  if (!isAuthenticated) {
+    return <Redirect href="/login" />;
+  }
+
+  if (useDesktopShell) {
+    return <AppDesktopShell />;
+  }
+
+  return <AppRouteStack />;
+}

app/(app)/chat/[conversationId].tsx

@@ -0,0 +1,5 @@
+import { ChatScreen } from '../../../src/screens/message';
+
+export default function ChatRoute() {
+  return <ChatScreen />;
+}

app/(app)/chat/private-info.tsx

@@ -0,0 +1,5 @@
+import { PrivateChatInfoScreen } from '../../../src/screens/message';
+
+export default function PrivateChatInfoRoute() {
+  return <PrivateChatInfoScreen />;
+}

app/(app)/group/[groupId]/index.tsx

@@ -0,0 +1,5 @@
+import { GroupInfoScreen } from '../../../../src/screens/message';
+
+export default function GroupInfoRoute() {
+  return <GroupInfoScreen />;
+}

app/(app)/group/[groupId]/members.tsx

@@ -0,0 +1,5 @@
+import { GroupMembersScreen } from '../../../../src/screens/message';
+
+export default function GroupMembersRoute() {
+  return <GroupMembersScreen />;
+}

app/(app)/group/create.tsx

@@ -0,0 +1,5 @@
+import { CreateGroupScreen } from '../../../src/screens/message';
+
+export default function CreateGroupRoute() {
+  return <CreateGroupScreen />;
+}

app/(app)/group/invite.tsx

@@ -0,0 +1,5 @@
+import GroupInviteDetailScreen from '../../../src/screens/message/GroupInviteDetailScreen';
+
+export default function GroupInviteRoute() {
+  return <GroupInviteDetailScreen />;
+}

app/(app)/group/join.tsx

@@ -0,0 +1,5 @@
+import { JoinGroupScreen } from '../../../src/screens/message';
+
+export default function JoinGroupRoute() {
+  return <JoinGroupScreen />;
+}

app/(app)/group/request.tsx

@@ -0,0 +1,5 @@
+import GroupRequestDetailScreen from '../../../src/screens/message/GroupRequestDetailScreen';
+
+export default function GroupRequestRoute() {
+  return <GroupRequestDetailScreen />;
+}

app/(app)/posts/create.tsx

@@ -0,0 +1,5 @@
+import { CreatePostScreen } from '../../../src/screens/create';
+
+export default function CreatePostRoute() {
+  return <CreatePostScreen />;
+}

app/(app)/qrcode/login/[sessionId].tsx

@@ -0,0 +1,5 @@
+import { QRCodeConfirmScreen } from '../../../../src/screens/auth/QRCodeConfirmScreen';
+
+export default function QrLoginConfirmRoute() {
+  return <QRCodeConfirmScreen />;
+}

app/(app)/users/[userId]/[type].tsx

@@ -0,0 +1,5 @@
+import FollowListScreen from '../../../../src/screens/profile/FollowListScreen';
+
+export default function FollowListRoute() {
+  return <FollowListScreen />;
+}

app/(auth)/_layout.tsx

@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function AuthLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}

app/(auth)/forgot-password.tsx

@@ -0,0 +1,5 @@
+import { ForgotPasswordScreen } from '../../src/screens/auth';
+
+export default function ForgotPasswordRoute() {
+  return <ForgotPasswordScreen />;
+}

app/(auth)/login.tsx

@@ -0,0 +1,5 @@
+import { LoginScreen } from '../../src/screens/auth';
+
+export default function LoginRoute() {
+  return <LoginScreen />;
+}

app/(auth)/register.tsx

@@ -0,0 +1,5 @@
+import { RegisterScreen } from '../../src/screens/auth';
+
+export default function RegisterRoute() {
+  return <RegisterScreen />;
+}

app/_layout.tsx

@@ -0,0 +1,205 @@
+import React, { useEffect, useRef, useState } from 'react';
+import { AppState, AppStateStatus, Platform, View, ActivityIndicator } from 'react-native';
+import { Stack, useRouter } from 'expo-router';
+import { StatusBar } from 'expo-status-bar';
+import { GestureHandlerRootView } from 'react-native-gesture-handler';
+import { SafeAreaProvider } from 'react-native-safe-area-context';
+import { PaperProvider } from 'react-native-paper';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import * as Notifications from 'expo-notifications';
+import * as SystemUI from 'expo-system-ui';
+
+import { registerNotificationPresentationHandler } from '../src/services/notificationPreferences';
+import {
+  ThemeBootstrap,
+  useAppColors,
+  usePaperThemeFromStore,
+  useResolvedColorScheme,
+} from '../src/theme';
+import { AppBackButton } from '../src/components/common';
+import AppPromptBar from '../src/components/common/AppPromptBar';
+import AppDialogHost from '../src/components/common/AppDialogHost';
+import { installAlertOverride } from '../src/services/alertOverride';
+import { useAuthStore } from '../src/stores';
+
+registerNotificationPresentationHandler();
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      retry: 2,
+      staleTime: 5 * 60 * 1000,
+    },
+  },
+});
+
+installAlertOverride();
+
+if (Platform.OS === 'web' && typeof document !== 'undefined') {
+  const style = document.createElement('style');
+  style.textContent = `
+    input:focus, textarea:focus, select:focus {
+      outline: none !important;
+      outline-width: 0 !important;
+      box-shadow: none !important;
+    }
+    input:focus-visible, textarea:focus-visible {
+      outline: none !important;
+    }
+    *:focus { outline: none !important; }
+    *:focus-visible { outline: none !important; }
+  `;
+  document.head.appendChild(style);
+}
+
+function SystemChrome() {
+  const colors = useAppColors();
+  useEffect(() => {
+    void SystemUI.setBackgroundColorAsync(colors.background.default);
+    if (Platform.OS === 'web' && typeof document !== 'undefined') {
+      const meta = document.querySelector('meta[name="theme-color"]');
+      if (meta) {
+        meta.setAttribute('content', colors.background.default);
+      }
+    }
+  }, [colors.background.default]);
+  return null;
+}
+
+function SessionGate({ children }: { children: React.ReactNode }) {
+  const [ready, setReady] = useState(false);
+  const fetchCurrentUser = useAuthStore((s) => s.fetchCurrentUser);
+  const colors = useAppColors();
+
+  useEffect(() => {
+    fetchCurrentUser().finally(() => setReady(true));
+  }, [fetchCurrentUser]);
+
+  if (!ready) {
+    return (
+      <View
+        style={{
+          flex: 1,
+          justifyContent: 'center',
+          alignItems: 'center',
+          backgroundColor: colors.background.default,
+        }}
+      >
+        <ActivityIndicator size="large" color={colors.primary.main} />
+      </View>
+    );
+  }
+  return <>{children}</>;
+}
+
+function NotificationBootstrap() {
+  const appState = useRef<AppStateStatus>(AppState.currentState);
+  const notificationResponseListener = useRef<Notifications.EventSubscription | null>(null);
+
+  useEffect(() => {
+    const initNotifications = async () => {
+      const { loadNotificationPreferences } = await import('../src/services/notificationPreferences');
+      await loadNotificationPreferences();
+      const { systemNotificationService } = await import('../src/services/systemNotificationService');
+      await systemNotificationService.initialize();
+      const { initBackgroundService } = await import('../src/services/backgroundService');
+      await initBackgroundService();
+
+      const subscription = AppState.addEventListener('change', (nextAppState) => {
+        if (appState.current.match(/inactive|background/) && nextAppState === 'active') {
+          systemNotificationService.clearBadge();
+        }
+        appState.current = nextAppState;
+      });
+
+      notificationResponseListener.current = Notifications.addNotificationResponseReceivedListener(
+        (response) => {
+          void response.notification.request.content.data;
+        }
+      );
+
+      const notificationReceivedSubscription = Notifications.addNotificationReceivedListener(
+        (notification) => {
+          void notification;
+        }
+      );
+
+      return () => {
+        subscription.remove();
+        notificationResponseListener.current?.remove();
+        notificationReceivedSubscription.remove();
+      };
+    };
+
+    initNotifications();
+  }, []);
+
+  return null;
+}
+
+function ThemedStack() {
+  const router = useRouter();
+  const colors = useAppColors();
+  const resolved = useResolvedColorScheme();
+
+  return (
+    <>
+      <StatusBar style={resolved === 'dark' ? 'light' : 'dark'} />
+      <SystemChrome />
+      <SessionGate>
+        <NotificationBootstrap />
+        <Stack screenOptions={{ headerShown: false }}>
+          <Stack.Screen name="index" options={{ headerShown: false }} />
+          <Stack.Screen name="(auth)" options={{ headerShown: false }} />
+          <Stack.Screen name="(app)" options={{ headerShown: false }} />
+          <Stack.Screen
+            name="post/[postId]"
+            options={{
+              headerShown: true,
+              title: '',
+              // 与 PostDetailScreen 的 SafeAreaView（background.default）同色，避免出现 header/内容之间的色差线
+              headerStyle: { backgroundColor: colors.background.default },
+              headerTintColor: colors.text.primary,
+              headerShadowVisible: false,
+              headerBackVisible: false,
+              headerLeft: () => <AppBackButton onPress={() => router.back()} />,
+            }}
+          />
+          <Stack.Screen
+            name="user/[userId]"
+            options={{
+              headerShown: true,
+              title: '用户主页',
+              headerStyle: { backgroundColor: colors.background.paper },
+              headerTintColor: colors.text.primary,
+              headerBackVisible: false,
+              headerLeft: () => <AppBackButton onPress={() => router.back()} />,
+            }}
+          />
+        </Stack>
+      </SessionGate>
+    </>
+  );
+}
+
+function ThemedProviders({ children }: { children: React.ReactNode }) {
+  const theme = usePaperThemeFromStore();
+  return <PaperProvider theme={theme}>{children}</PaperProvider>;
+}
+
+export default function RootLayout() {
+  return (
+    <GestureHandlerRootView style={{ flex: 1 }}>
+      <SafeAreaProvider>
+        <ThemedProviders>
+          <QueryClientProvider client={queryClient}>
+            <ThemeBootstrap />
+            <ThemedStack />
+            <AppPromptBar />
+            <AppDialogHost />
+          </QueryClientProvider>
+        </ThemedProviders>
+      </SafeAreaProvider>
+    </GestureHandlerRootView>
+  );
+}

app/index.tsx

@@ -0,0 +1,11 @@
+import { Redirect } from 'expo-router';
+
+import { useAuthStore } from '../src/stores';
+
+export default function Index() {
+  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
+  if (isAuthenticated) {
+    return <Redirect href="/home" />;
+  }
+  return <Redirect href="/login" />;
+}

app/post/[postId].tsx

@@ -0,0 +1,5 @@
+import { PostDetailScreen } from '../../src/screens/home';
+
+export default function PostDetailRoute() {
+  return <PostDetailScreen />;
+}

app/user/[userId].tsx

@@ -0,0 +1,5 @@
+import { UserScreen } from '../../src/screens/profile';
+
+export default function UserProfileRoute() {
+  return <UserScreen />;
+}

index.ts

@@ -1,8 +1 @@
-import { registerRootComponent } from 'expo';
-
-import App from './App';
-
-// registerRootComponent calls AppRegistry.registerComponent('main', () => App);
-// It also ensures that whether you load the app in Expo Go or in a native build,
-// the environment is set up appropriately
-registerRootComponent(App);
+import 'expo-router/entry';

package.json

@@ -1,7 +1,7 @@
 {
   "name": "carrot_bbs",
-  "version": "1.0.0",
-  "main": "index.ts",
+  "version": "1.0.1",
+  "main": "expo-router/entry",
   "scripts": {
     "start": "expo start",
     "android": "expo run:android",
@@ -25,7 +25,9 @@
     "axios": "^1.13.6",
     "date-fns": "^4.1.0",
     "expo": "~55.0.4",
-    "expo-background-fetch": "~55.0.9",
+    "expo-background-fetch": "~55.0.10",
+    "expo-background-task": "~55.0.10",
+    "expo-camera": "^55.0.10",
     "expo-constants": "~55.0.7",
     "expo-dev-client": "~55.0.10",
     "expo-file-system": "~55.0.10",
@@ -43,6 +45,9 @@
     "expo-task-manager": "~55.0.9",
     "expo-updates": "^55.0.12",
     "expo-video": "^55.0.10",
+    "katex": "^0.16.42",
+    "markdown-it": "^14.1.1",
+    "prismjs": "^1.30.0",
     "react": "19.2.0",
     "react-dom": "19.2.0",
     "react-native": "0.83.2",
@@ -54,6 +59,7 @@
     "react-native-screens": "~4.23.0",
     "react-native-sse": "^1.2.1",
     "react-native-web": "^0.21.0",
+    "react-native-webview": "13.16.0",
     "react-native-worklets": "0.7.2",
     "zod": "^4.3.6",
     "zustand": "^5.0.11"

plans/architecture-comparison-report.md

@@ -0,0 +1,394 @@
+# Messages模块与PostService/Manager架构对比分析报告
+
+## 一、Messages模块架构分析
+
+### 1.1 架构层次结构
+
+Messages模块采用了**清晰的分层架构**，各层职责明确：
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                      表现层 (Screens)                        │
+│  ChatScreen, MessageListScreen, NotificationsScreen         │
+├─────────────────────────────────────────────────────────────┤
+│                      Hooks层                                │
+│  useDifferentialMessages, useChatScreen                     │
+├─────────────────────────────────────────────────────────────┤
+│                      用例层 (UseCases)                       │
+│  ProcessMessageUseCase                                       │
+├─────────────────────────────────────────────────────────────┤
+│                      领域层 (Entities)                       │
+│  Message, Conversation, GroupNotice                         │
+├─────────────────────────────────────────────────────────────┤
+│                      仓库层 (Repositories)                   │
+│  MessageRepository, IMessageRepository                      │
+├─────────────────────────────────────────────────────────────┤
+│                      数据源层 (DataSources)                  │
+│  SSEClient, LocalDataSource, ApiDataSource                  │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### 1.2 核心组件详解
+
+#### 1.2.1 领域实体层 (Core/Entities)
+- **Message.ts**: 定义消息、会话、群通知等核心领域模型
+- 包含工厂函数：`createMessage`, `createConversation`
+- 包含业务逻辑函数：`isMessageFromCurrentUser`, `shouldIncrementUnread`, `buildTextContent`
+
+#### 1.2.2 用例层 (Core/UseCases)
+- **ProcessMessageUseCase**: 核心业务逻辑编排器
+  - 订阅SSE事件（chat, group_message, read, recall, typing, group_notice等）
+  - 消息去重处理（processedMessageIds Set）
+  - 已读状态保护（pendingReadMap + 版本号机制）
+  - 用户信息缓存与去重请求（pendingUserRequests Map）
+  - 事件发布订阅模式（subscribers Set）
+
+#### 1.2.3 仓库层 (Data/Repositories)
+- **IMessageRepository**: 定义数据访问接口
+  - 消息操作：getMessages, saveMessage, updateMessageStatus, markAsRead
+  - 会话操作：getConversations, saveConversation, updateUnreadCount
+  - 同步操作：syncMessages, getServerLastSeq
+
+- **MessageRepository**: 实现接口
+  - 封装SQLite数据库操作
+  - 消息与CachedMessage的转换
+
+#### 1.2.4 映射器层 (Data/Mappers)
+- **MessageMapper**: 数据转换
+  - `fromApiResponse`: API响应 → 应用模型
+  - `fromDbRecord`: 数据库记录 → 应用模型
+  - `toDbRecord`: 应用模型 → 数据库记录
+  - `toApiRequest`: 应用模型 → API请求
+  - 创建消息片段：`createTextSegment`, `createImageSegment`
+
+#### 1.2.5 差异计算基础设施 (Infrastructure/Diff)
+- **MessageDiffCalculator**: 消息列表差异计算
+  - 计算added, updated, deleted, moved, unchanged
+  - 变化比例检测（changeRatio > 0.5 时触发重置）
+  - 增量差异计算（基于缓存）
+
+- **MessageUpdateBatcher**: 批量更新处理器
+  - 16ms批量间隔（约60fps）
+  - 去重和合并更新
+  - 100ms最大等待时间
+  - 统计信息：totalBatches, totalUpdates, averageBatchSize
+
+- **types.ts**: 完整的类型定义
+  - MessageUpdateType枚举：ADD, UPDATE, DELETE, MOVE, BATCH_*
+  - DiffResult, DiffConfig等接口
+
+#### 1.2.6 Hook层
+- **useDifferentialMessages**: 差异更新Hook
+  - 集成DiffCalculator和Batcher
+  - 自动处理批量更新
+  - 提供flush, reset, forceUpdate方法
+  - 支持配置：enableDiff, enableBatching, maxMessageCount, changeRatioThreshold
+
+### 1.3 数据流
+
+```
+SSE事件 → ProcessMessageUseCase → 事件发布 → useChatScreen → useDifferentialMessages
+                                    ↓                    ↓
+                              MessageRepository      差异计算 + 批量处理
+                                    ↓                    ↓
+                              SQLite数据库           优化后的消息列表
+```
+
+### 1.4 状态管理方式
+
+- **发布-订阅模式**：ProcessMessageUseCase作为事件中心
+- **本地SQLite缓存**：消息持久化存储
+- **内存状态**：通过Hook返回，组件直接消费
+- **差异更新**：通过MessageDiffCalculator + MessageUpdateBatcher减少重渲染
+
+---
+
+## 二、PostService/Manager架构分析
+
+### 2.1 架构层次结构
+
+Post模块采用了**扁平化架构**，Service和Manager层职责混合：
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                      表现层 (Screens)                        │
+│  HomeScreen, PostDetailScreen, CreatePostScreen              │
+├─────────────────────────────────────────────────────────────┤
+│                      Hooks层                                │
+│  useCursorPagination (通用), usePrefetch                     │
+├─────────────────────────────────────────────────────────────┤
+│                      Store层 (Zustand)                      │
+│  useUserStore (直接操作状态), postManager (缓存管理)         │
+├─────────────────────────────────────────────────────────────┤
+│                      Service层                              │
+│  postService (API调用 + 状态更新)                            │
+├─────────────────────────────────────────────────────────────┤
+│                      数据源                                 │
+│  API (直接调用)                                             │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### 2.2 核心组件详解
+
+#### 2.2.1 Service层 (Services)
+- **postService.ts**: 帖子服务
+  - CRUD操作：getPosts, getPost, createPost, updatePost, deletePost
+  - 互动操作：likePost, unlikePost, favoritePost, unfavoritePost
+  - 分页支持：传统分页 + 游标分页
+  - **问题**：直接操作useUserStore（违反分层原则）
+
+#### 2.2.2 Manager层 (Stores)
+- **postManager.ts**: 帖子缓存管理器
+  - 继承CacheBus（发布订阅基类）
+  - 内存缓存：listCache, detailCache
+  - 请求去重：pendingRequests Map
+  - TTL管理：LIST_TTL=30s, DETAIL_TTL=60s
+  - 后台刷新机制
+
+#### 2.2.3 Store层 (Zustand)
+- **useUserStore**: 用户状态存储
+  - 直接存储posts数组
+  - 帖子操作副作用直接修改状态
+  - 混合了用户数据和帖子数据
+
+#### 2.2.4 映射器层 (Data/Mappers)
+- **PostMapper**: 数据转换
+  - `fromApiResponse`: API响应 → 应用模型
+  - `fromApiResponseList`: 批量转换
+  - `toApiRequest`: 应用模型 → API请求
+  - 相比MessageMapper缺少数据库记录转换方法
+
+### 2.3 数据流
+
+```
+HomeScreen → useCursorPagination → postService.getPostsCursor
+                                    ↓
+                              useUserStore.setState(posts)
+                                    ↓
+                              PostCard组件渲染
+```
+
+### 2.4 状态管理方式
+
+- **Zustand Store**：集中式状态管理
+- **内存缓存**：postManager提供应用级缓存
+- **请求去重**：dedupe方法防止重复请求
+- **直接修改**：postService直接调用useUserStore.setState
+
+---
+
+## 三、主要架构差异
+
+### 3.1 分层复杂度
+
+| 维度 | Messages模块 | Post模块 |
+|------|-------------|---------|
+| 层次深度 | 6层（Entity→UseCase→Repository→Mapper→Hook→Screen） | 4层（Service→Store→Hook→Screen） |
+| 用例层 | 独立ProcessMessageUseCase | 无 |
+| 仓库接口 | IMessageRepository抽象接口 | 无 |
+| 基础设施 | Diff模块（Calculator + Batcher） | 无 |
+
+### 3.2 数据持久化
+
+| 维度 | Messages模块 | Post模块 |
+|------|-------------|---------|
+| 本地存储 | SQLite数据库 | 无 |
+| 缓存抽象 | MessageRepository封装 | postManager内存缓存 |
+| 离线支持 | 完整 | 不支持 |
+
+### 3.3 实时更新
+
+| 维度 | Messages模块 | Post模块 |
+|------|-------------|---------|
+| 推送机制 | SSE实时推送 | 轮询/下拉刷新 |
+| 事件订阅 | ProcessMessageUseCase发布订阅 | 无 |
+| 增量更新 | MessageDiffCalculator | 无 |
+
+### 3.4 状态管理
+
+| 维度 | Messages模块 | Post模块 |
+|------|-------------|---------|
+| 管理方式 | 发布订阅 + Hook局部状态 | Zustand全局Store |
+| 状态来源 | useChatScreen, useDifferentialMessages | useUserStore |
+| 批量更新 | MessageUpdateBatcher | 无 |
+| 差异检测 | MessageDiffCalculator | 无 |
+
+### 3.5 依赖方向
+
+**Messages模块（正确）**：
+```
+Hook → UseCase → Repository → DataSource
+              ↓
+         Entity（不依赖外部）
+```
+
+**Post模块（问题）**：
+```
+Service → Store（循环依赖风险）
+   ↓
+API直接调用
+```
+
+### 3.6 核心问题总结
+
+| # | 问题 | Messages | Post |
+|---|------|---------|------|
+| 1 | 违反分层原则 | 无 | postService直接操作useUserStore |
+| 2 | 缺少UseCase层 | ProcessMessageUseCase | 无业务逻辑编排 |
+| 3 | 缺少Repository抽象 | IMessageRepository | 无数据访问接口 |
+| 4 | 无差异更新 | useDifferentialMessages | 无 |
+| 5 | 无批量处理 | MessageUpdateBatcher | 无 |
+| 6 | 无本地持久化 | SQLite | 无 |
+| 7 | 无实时推送 | SSE | 无 |
+
+---
+
+## 四、对齐建议
+
+### 4.1 架构重构目标
+
+将Post模块对齐到Messages模块的架构模式：
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                      表现层 (Screens)                        │
+│  HomeScreen, PostDetailScreen                               │
+├─────────────────────────────────────────────────────────────┤
+│                      Hooks层                                │
+│  useDifferentialPosts (新增)                                │
+├─────────────────────────────────────────────────────────────┤
+│                      用例层 (UseCases)                       │
+│  ProcessPostUseCase (新增)                                  │
+├─────────────────────────────────────────────────────────────┤
+│                      领域层 (Entities)                       │
+│  Post, PostComment (新增)                                   │
+├─────────────────────────────────────────────────────────────┤
+│                      仓库层 (Repositories)                   │
+│  PostRepository, IPostRepository (新增)                     │
+├─────────────────────────────────────────────────────────────┤
+│                      Service层                              │
+│  postService (仅保留API调用，移除状态操作)                    │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### 4.2 具体改造项
+
+#### 4.2.1 创建Post领域实体
+```typescript
+// src/core/entities/Post.ts
+export interface Post {
+  id: string;
+  authorId: string;
+  title: string;
+  content: string;
+  images: string[];
+  likeCount: number;
+  commentCount: number;
+  // ... 其他字段
+}
+```
+
+#### 4.2.2 创建ProcessPostUseCase
+```typescript
+// src/core/usecases/ProcessPostUseCase.ts
+class ProcessPostUseCase {
+  // 帖子增删改查
+  // 点赞/收藏逻辑
+  // 事件发布订阅
+}
+```
+
+#### 4.2.3 创建IPostRepository接口
+```typescript
+// src/data/repositories/interfaces/IPostRepository.ts
+interface IPostRepository {
+  getPosts(type: string, page: number, pageSize: number): Promise<Post[]>;
+  savePost(post: Post): Promise<void>;
+  updatePost(postId: string, updates: Partial<Post>): Promise<void>;
+  // ...
+}
+```
+
+#### 4.2.4 创建PostRepository实现
+```typescript
+// src/data/repositories/PostRepository.ts
+// 封装SQLite操作，实现IPostRepository接口
+```
+
+#### 4.2.5 创建useDifferentialPosts Hook
+```typescript
+// src/hooks/useDifferentialPosts.ts
+// 类似useDifferentialMessages，处理帖子列表差异更新
+```
+
+#### 4.2.6 改造postService
+- 移除对useUserStore的直接依赖
+- 仅保留API调用职责
+
+---
+
+## 五、架构对比图
+
+```mermaid
+graph TB
+    subgraph "Messages模块 [理想架构]"
+        E1[Entity<br/>Message.ts]
+        U1[UseCase<br/>ProcessMessageUseCase]
+        R1[Repository<br/>MessageRepository]
+        M1[Mapper<br/>MessageMapper]
+        H1[Hook<br/>useDifferentialMessages]
+        D1[Diff基础设施<br/>DiffCalculator + Batcher]
+        S1[(SQLite)]
+        
+        E1 --> U1
+        U1 --> R1
+        U1 --> D1
+        R1 --> S1
+        M1 --> R1
+        D1 --> H1
+        H1 --> S1
+    end
+    
+    subgraph "Post模块 [当前架构]"
+        E2[PostMapper]
+        SV2[postService<br/>直接操作Store]
+        ST2[useUserStore<br/>Zustand]
+        H2[Hook<br/>useCursorPagination]
+        PM2[postManager<br/>内存缓存]
+        
+        E2 --> SV2
+        SV2 --> ST2
+        H2 --> SV2
+        PM2 --> ST2
+    end
+    
+    style E1 fill:#90EE90
+    style U1 fill:#90EE90
+    style R1 fill:#90EE90
+    style D1 fill:#90EE90
+    style H1 fill:#90EE90
+    style S1 fill:#90EE90
+    
+    style SV2 fill:#FFB6C1
+    style ST2 fill:#FFB6C1
+```
+
+---
+
+## 六、结论
+
+Messages模块是一个**架构完善**的模块，具备：
+1. 清晰的分层架构
+2. 独立的业务逻辑编排层（UseCase）
+3. 完整的数据持久化（SQLite）
+4. 高效的差异更新机制
+5. 实时事件推送能力
+
+Post模块当前存在以下问题：
+1. **违反分层原则**：Service直接操作Store
+2. **缺少UseCase层**：业务逻辑分散
+3. **无数据抽象**：缺少Repository接口
+4. **无差异更新**：每次全量更新导致性能问题
+5. **无本地持久化**：无法离线使用
+
+建议按照对齐建议逐步重构Post模块，使其架构与Messages模块对齐。

src/app-navigation/AppDesktopShell.tsx

@@ -0,0 +1,243 @@
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import {
+  View,
+  StyleSheet,
+  ScrollView,
+  TouchableOpacity,
+  Text,
+  Platform,
+} from 'react-native';
+import { useSafeAreaInsets, SafeAreaView } from 'react-native-safe-area-context';
+import { MaterialCommunityIcons } from '@expo/vector-icons';
+import { usePathname, useRouter } from 'expo-router';
+
+import { useAppColors, shadows, type AppColors } from '../theme';
+import { useTotalUnreadCount } from '../stores';
+import { AppRouteStack } from './AppRouteStack';
+
+type TabName = 'HomeTab' | 'MessageTab' | 'AppsTab' | 'ProfileTab';
+
+const SIDEBAR_WIDTH_DESKTOP = 240;
+const SIDEBAR_WIDTH_TABLET = 200;
+const SIDEBAR_COLLAPSED_WIDTH = 72;
+
+const NAV_ITEMS: { name: TabName; label: string; href: string; icon: string; iconOutline: string }[] = [
+  { name: 'HomeTab', label: '首页', href: '/home', icon: 'home', iconOutline: 'home-outline' },
+  { name: 'AppsTab', label: '应用', href: '/apps', icon: 'view-grid', iconOutline: 'view-grid-outline' },
+  { name: 'MessageTab', label: '消息', href: '/messages', icon: 'message-text', iconOutline: 'message-text-outline' },
+  { name: 'ProfileTab', label: '我的', href: '/profile', icon: 'account', iconOutline: 'account-outline' },
+];
+
+function pathToTab(pathname: string): TabName {
+  if (pathname.startsWith('/messages')) return 'MessageTab';
+  if (pathname.startsWith('/apps')) return 'AppsTab';
+  if (pathname.startsWith('/profile')) return 'ProfileTab';
+  if (pathname.startsWith('/home')) return 'HomeTab';
+  return 'HomeTab';
+}
+
+function createDesktopShellStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flex: 1,
+      flexDirection: 'row',
+      backgroundColor: colors.background.default,
+    },
+    sidebar: {
+      backgroundColor: colors.background.paper,
+      borderRightWidth: 1,
+      borderRightColor: colors.divider,
+      flexDirection: 'column',
+      ...shadows.md,
+    },
+    sidebarHeader: {
+      paddingHorizontal: 16,
+      paddingVertical: 20,
+      borderBottomWidth: 1,
+      borderBottomColor: colors.divider,
+      alignItems: 'center',
+      justifyContent: 'center',
+      flexDirection: 'row',
+    },
+    logoText: {
+      fontSize: 18,
+      fontWeight: '700',
+      color: colors.primary.main,
+      marginLeft: 8,
+    },
+    sidebarContent: {
+      flex: 1,
+      paddingTop: 8,
+    },
+    sidebarItem: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      paddingHorizontal: 16,
+      paddingVertical: 12,
+      marginHorizontal: 8,
+      marginVertical: 4,
+      borderRadius: 12,
+    },
+    sidebarItemActive: {
+      backgroundColor: `${colors.primary.main}15`,
+    },
+    sidebarItemCollapsed: {
+      justifyContent: 'center',
+      paddingHorizontal: 0,
+    },
+    sidebarIconContainer: {
+      position: 'relative',
+      width: 40,
+      height: 40,
+      alignItems: 'center',
+      justifyContent: 'center',
+      borderRadius: 12,
+    },
+    sidebarLabel: {
+      fontSize: 15,
+      fontWeight: '500',
+      color: colors.text.secondary,
+      marginLeft: 12,
+      flex: 1,
+    },
+    sidebarLabelActive: {
+      color: colors.primary.main,
+      fontWeight: '600',
+    },
+    collapseButton: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'flex-end',
+      paddingHorizontal: 16,
+      paddingVertical: 12,
+      borderTopWidth: 1,
+      borderTopColor: colors.divider,
+    },
+    collapseButtonCollapsed: {
+      justifyContent: 'center',
+      paddingHorizontal: 0,
+    },
+    badge: {
+      position: 'absolute',
+      top: 2,
+      right: 2,
+      backgroundColor: colors.error.main,
+      borderRadius: 10,
+      minWidth: 18,
+      height: 18,
+      alignItems: 'center',
+      justifyContent: 'center',
+      paddingHorizontal: 4,
+    },
+    badgeText: {
+      color: colors.primary.contrast,
+      fontSize: 10,
+      fontWeight: '600',
+    },
+    mainContent: {
+      flex: 1,
+      backgroundColor: colors.background.default,
+    },
+  });
+}
+
+export function AppDesktopShell() {
+  const colors = useAppColors();
+  const styles = useMemo(() => createDesktopShellStyles(colors), [colors]);
+  const insets = useSafeAreaInsets();
+  const router = useRouter();
+  const pathname = usePathname();
+  const unreadCount = useTotalUnreadCount();
+  const [isCollapsed, setIsCollapsed] = useState(false);
+  const [isDesktop, setIsDesktop] = useState(false);
+
+  useEffect(() => {
+    if (Platform.OS !== 'web') return;
+    const check = () => {
+      const w = window.innerWidth || document.documentElement.clientWidth;
+      setIsDesktop(w >= SIDEBAR_WIDTH_DESKTOP);
+    };
+    check();
+    window.addEventListener('resize', check);
+    return () => window.removeEventListener('resize', check);
+  }, []);
+
+  const sidebarWidth = isCollapsed
+    ? SIDEBAR_COLLAPSED_WIDTH
+    : isDesktop
+      ? SIDEBAR_WIDTH_DESKTOP
+      : SIDEBAR_WIDTH_TABLET;
+
+  const currentTab = pathToTab(pathname || '/home');
+
+  const handleTabChange = useCallback(
+    (href: string) => {
+      router.replace(href);
+    },
+    [router]
+  );
+
+  return (
+    <View style={styles.container}>
+      <SafeAreaView
+        style={[
+          styles.sidebar,
+          { width: sidebarWidth, paddingTop: insets.top, paddingBottom: insets.bottom },
+        ]}
+      >
+        <View style={styles.sidebarHeader}>
+          <MaterialCommunityIcons name="carrot" size={32} color={colors.primary.main} />
+          {!isCollapsed && <Text style={styles.logoText}>胡萝卜BBS</Text>}
+        </View>
+        <ScrollView style={styles.sidebarContent} showsVerticalScrollIndicator={false}>
+          {NAV_ITEMS.map((item) => {
+            const isActive = currentTab === item.name;
+            const showBadge = item.name === 'MessageTab' && unreadCount > 0;
+            return (
+              <TouchableOpacity
+                key={item.name}
+                style={[
+                  styles.sidebarItem,
+                  isActive && styles.sidebarItemActive,
+                  isCollapsed && styles.sidebarItemCollapsed,
+                ]}
+                onPress={() => handleTabChange(item.href)}
+                activeOpacity={0.7}
+              >
+                <View style={styles.sidebarIconContainer}>
+                  <MaterialCommunityIcons
+                    name={(isActive ? item.icon : item.iconOutline) as any}
+                    size={24}
+                    color={isActive ? colors.primary.main : colors.text.secondary}
+                  />
+                  {showBadge ? (
+                    <View style={styles.badge}>
+                      <Text style={styles.badgeText}>{unreadCount > 99 ? '99+' : unreadCount}</Text>
+                    </View>
+                  ) : null}
+                </View>
+                {!isCollapsed ? (
+                  <Text style={[styles.sidebarLabel, isActive && styles.sidebarLabelActive]}>{item.label}</Text>
+                ) : null}
+              </TouchableOpacity>
+            );
+          })}
+        </ScrollView>
+        <TouchableOpacity
+          style={[styles.collapseButton, isCollapsed && styles.collapseButtonCollapsed]}
+          onPress={() => setIsCollapsed((c) => !c)}
+          activeOpacity={0.7}
+        >
+          <MaterialCommunityIcons
+            name={isCollapsed ? 'chevron-right' : 'chevron-left'}
+            size={24}
+            color={colors.text.secondary}
+          />
+        </TouchableOpacity>
+      </SafeAreaView>
+      <View style={styles.mainContent}>
+        <AppRouteStack />
+      </View>
+    </View>
+  );
+}

src/app-navigation/AppRouteStack.tsx

@@ -0,0 +1,8 @@
+import { Stack } from 'expo-router';
+
+/**
+ * 已登录区内栈：由 app/(app) 下文件系统自动注册子路由
+ */
+export function AppRouteStack() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}

src/components/business/CommentItem.tsx

@@ -1,21 +1,19 @@
 /**
- * CommentItem 评论项组件 - QQ频道风格
+ * CommentItem 评论项组件 - 小红书 / 贴吧式平铺列表
  * 支持嵌套回复显示、楼层号、身份标识、删除评论、图片显示
  */
 
-import React, { useState } from 'react';
-import { View, TouchableOpacity, StyleSheet, Alert, Dimensions } from 'react-native';
+import React, { useMemo, useState } from 'react';
+import { View, TouchableOpacity, StyleSheet, Alert } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { formatDistanceToNow } from 'date-fns';
 import { zhCN } from 'date-fns/locale';
-import { colors, spacing, borderRadius, fontSizes } from '../../theme';
+import { spacing, borderRadius, fontSizes, useAppColors, type AppColors } from '../../theme';
 import { Comment, CommentImage } from '../../types';
 import Text from '../common/Text';
 import Avatar from '../common/Avatar';
 import { CompactImageGrid, ImageGridItem } from '../common';
 
-const { width: screenWidth } = Dimensions.get('window');
-
 interface CommentItemProps {
   comment: Comment;
   onUserPress: () => void;
@@ -33,6 +31,174 @@ interface CommentItemProps {
   currentUserId?: string; // 当前用户ID，用于判断子评论作者
 }
 
+function createCommentItemStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flexDirection: 'row',
+      paddingTop: spacing.md,
+      paddingBottom: spacing.md,
+      paddingHorizontal: spacing.md,
+      backgroundColor: colors.background.paper,
+      borderBottomWidth: StyleSheet.hairlineWidth,
+      borderBottomColor: colors.divider,
+    },
+    content: {
+      flex: 1,
+      marginLeft: spacing.sm,
+      minWidth: 0,
+    },
+    header: {
+      flexDirection: 'row',
+      justifyContent: 'space-between',
+      alignItems: 'center',
+      marginBottom: spacing.xs,
+      gap: spacing.xs,
+    },
+    userInfo: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      flexWrap: 'wrap',
+      flex: 1,
+      minWidth: 0,
+    },
+    metaDot: {
+      fontSize: fontSizes.xs,
+      color: colors.text.hint,
+      marginHorizontal: 2,
+    },
+    username: {
+      fontWeight: '600',
+      fontSize: fontSizes.sm,
+      color: colors.text.primary,
+      marginRight: spacing.xs,
+    },
+    badge: {
+      paddingHorizontal: 4,
+      paddingVertical: 1,
+      borderRadius: 2,
+      marginRight: spacing.xs,
+    },
+    smallBadge: {
+      paddingHorizontal: 2,
+      paddingVertical: 0,
+    },
+    authorBadge: {
+      backgroundColor: colors.primary.main,
+    },
+    adminBadge: {
+      backgroundColor: colors.error.main,
+    },
+    badgeText: {
+      color: colors.text.inverse,
+      fontSize: fontSizes.xs,
+      fontWeight: '600',
+    },
+    smallBadgeText: {
+      color: colors.text.inverse,
+      fontSize: 9,
+      fontWeight: '600',
+    },
+    timeText: {
+      fontSize: fontSizes.xs,
+      flexShrink: 0,
+    },
+    floorPlain: {
+      fontSize: fontSizes.xs,
+      flexShrink: 0,
+    },
+    replyReference: {
+      marginBottom: spacing.xs,
+    },
+    commentContent: {
+      marginBottom: spacing.xs,
+    },
+    text: {
+      lineHeight: 22,
+      fontSize: fontSizes.md,
+      color: colors.text.primary,
+    },
+    actions: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginTop: spacing.xs,
+      flexWrap: 'wrap',
+    },
+    actionButton: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginRight: spacing.lg,
+      paddingVertical: 4,
+      paddingRight: spacing.xs,
+    },
+    actionText: {
+      marginLeft: 4,
+      fontSize: fontSizes.xs,
+    },
+    subRepliesContainer: {
+      marginTop: spacing.sm,
+      marginLeft: 0,
+      paddingLeft: spacing.sm,
+      paddingVertical: spacing.xs,
+      borderLeftWidth: 2,
+      borderLeftColor: colors.divider,
+      backgroundColor: colors.background.default,
+    },
+    subReplyItem: {
+      flexDirection: 'row',
+      alignItems: 'flex-start',
+      marginBottom: spacing.md,
+    },
+    subReplyItemLast: {
+      marginBottom: 0,
+    },
+    subReplyBody: {
+      fontSize: fontSizes.sm,
+      lineHeight: 20,
+      marginTop: 2,
+    },
+    subReplyContent: {
+      flex: 1,
+      marginLeft: spacing.xs,
+    },
+    subReplyHeader: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginBottom: 2,
+    },
+    subReplyAuthor: {
+      fontWeight: '600',
+      color: colors.text.primary,
+      marginRight: spacing.xs,
+    },
+    moreRepliesButton: {
+      marginTop: spacing.xs,
+      paddingVertical: spacing.xs,
+    },
+    replyToText: {
+      fontSize: fontSizes.xs,
+    },
+    replyToName: {
+      fontSize: fontSizes.xs,
+      fontWeight: '500',
+    },
+    subReplyActions: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginTop: spacing.xs,
+    },
+    subActionButton: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginRight: spacing.sm,
+      paddingVertical: 2,
+    },
+    subActionText: {
+      marginLeft: 2,
+      fontSize: fontSizes.xs,
+    },
+  });
+}
+
 const CommentItem: React.FC<CommentItemProps> = ({
   comment,
   onUserPress,
@@ -49,6 +215,8 @@ const CommentItem: React.FC<CommentItemProps> = ({
   onImagePress,
   currentUserId,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createCommentItemStyles(colors), [colors]);
   const [isDeleting, setIsDeleting] = useState(false);
   // 格式化时间
   const formatTime = (dateString: string): string => {
@@ -181,11 +349,9 @@ const CommentItem: React.FC<CommentItemProps> = ({
     };
     
     return (
-      <View style={styles.floorTag}>
-        <Text variant="caption" color={colors.text.hint} style={styles.floorText}>
-          {getFloorText(floorNumber)}
-        </Text>
-      </View>
+      <Text variant="caption" color={colors.text.hint} style={styles.floorPlain}>
+        {getFloorText(floorNumber)}
+      </Text>
     );
   };
 
@@ -276,8 +442,9 @@ const CommentItem: React.FC<CommentItemProps> = ({
 
     return (
       <View style={styles.subRepliesContainer}>
-        {comment.replies.map((reply) => {
+        {comment.replies.map((reply, replyIndex) => {
           const replyAuthorId = reply.author?.id || '';
+          const isLastReply = replyIndex === comment.replies!.length - 1;
           // 根据 target_id 获取被回复的用户昵称
           const targetId = reply.target_id;
           const targetNickname = targetId ? getTargetUserNickname(targetId) : null;
@@ -287,7 +454,7 @@ const CommentItem: React.FC<CommentItemProps> = ({
           return (
             <TouchableOpacity
               key={reply.id}
-              style={styles.subReplyItem}
+              style={[styles.subReplyItem, isLastReply && styles.subReplyItemLast]}
               onPress={() => onReplyPress?.(reply)}
               activeOpacity={0.7}
             >
@@ -320,7 +487,7 @@ const CommentItem: React.FC<CommentItemProps> = ({
                 </View>
                 {/* 显示回复内容（如果有文字） */}
                 {reply.content ? (
-                  <Text variant="caption" color={colors.text.secondary} numberOfLines={2}>
+                  <Text variant="body" color={colors.text.primary} style={styles.subReplyBody}>
                     {reply.content}
                   </Text>
                 ) : null}
@@ -329,18 +496,18 @@ const CommentItem: React.FC<CommentItemProps> = ({
                 {/* 子评论操作按钮 */}
                 <View style={styles.subReplyActions}>
                   <TouchableOpacity
-                    style={styles.actionButton}
+                    style={styles.subActionButton}
                     onPress={() => onReplyPress?.(reply)}
                   >
                     <MaterialCommunityIcons name="reply" size={12} color={colors.text.hint} />
-                    <Text variant="caption" color={colors.text.hint} style={styles.actionText}>
+                    <Text variant="caption" color={colors.text.hint} style={styles.subActionText}>
                       回复
                     </Text>
                   </TouchableOpacity>
                   {/* 删除按钮 - 子评论作者可见 */}
                   {isSubReplyAuthor && (
                     <TouchableOpacity
-                      style={styles.actionButton}
+                      style={styles.subActionButton}
                       onPress={() => handleSubReplyDelete(reply)}
                       disabled={isDeleting}
                     >
@@ -349,7 +516,7 @@ const CommentItem: React.FC<CommentItemProps> = ({
                         size={12}
                         color={colors.text.hint}
                       />
-                      <Text variant="caption" color={colors.text.hint} style={styles.actionText}>
+                      <Text variant="caption" color={colors.text.hint} style={styles.subActionText}>
                         {isDeleting ? '删除中' : '删除'}
                       </Text>
                     </TouchableOpacity>
@@ -375,11 +542,11 @@ const CommentItem: React.FC<CommentItemProps> = ({
 
   return (
     <View style={styles.container}>
-      {/* 用户头像 */}
-      <TouchableOpacity onPress={onUserPress}>
+      {/* 用户头像 - 略大便于点击，与正文左对齐 */}
+      <TouchableOpacity onPress={onUserPress} activeOpacity={0.7}>
         <Avatar
           source={comment.author?.avatar}
-          size={36}
+          size={40}
           name={comment.author?.nickname}
         />
       </TouchableOpacity>
@@ -389,12 +556,13 @@ const CommentItem: React.FC<CommentItemProps> = ({
         {/* 用户信息行 - QQ频道风格 */}
         <View style={styles.header}>
           <View style={styles.userInfo}>
-            <TouchableOpacity onPress={onUserPress}>
-              <Text variant="body" style={styles.username}>
-                {comment.author?.nickname}
+            <TouchableOpacity onPress={onUserPress} activeOpacity={0.7}>
+              <Text variant="body" style={styles.username} numberOfLines={1}>
+                {comment.author?.nickname || '用户'}
               </Text>
             </TouchableOpacity>
             {renderBadges()}
+            <Text style={styles.metaDot}>·</Text>
             <Text variant="caption" color={colors.text.hint} style={styles.timeText}>
               {formatTime(comment.created_at || '')}
             </Text>
@@ -473,140 +641,4 @@ const CommentItem: React.FC<CommentItemProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
-  container: {
-    flexDirection: 'row',
-    paddingVertical: spacing.sm,
-    paddingHorizontal: spacing.lg,
-    backgroundColor: colors.background.paper,
-    borderBottomWidth: StyleSheet.hairlineWidth,
-    borderBottomColor: colors.divider,
-  },
-  content: {
-    flex: 1,
-    marginLeft: spacing.sm,
-  },
-  header: {
-    flexDirection: 'row',
-    justifyContent: 'space-between',
-    alignItems: 'flex-start',
-    marginBottom: spacing.xs,
-  },
-  userInfo: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    flexWrap: 'wrap',
-    flex: 1,
-  },
-  username: {
-    fontWeight: '600',
-    fontSize: fontSizes.sm,
-    color: colors.text.primary,
-    marginRight: spacing.xs,
-  },
-  badge: {
-    paddingHorizontal: 4,
-    paddingVertical: 1,
-    borderRadius: 2,
-    marginRight: spacing.xs,
-  },
-  smallBadge: {
-    paddingHorizontal: 2,
-    paddingVertical: 0,
-  },
-  authorBadge: {
-    backgroundColor: colors.primary.main,
-  },
-  adminBadge: {
-    backgroundColor: colors.error.main,
-  },
-  badgeText: {
-    color: colors.text.inverse,
-    fontSize: fontSizes.xs,
-    fontWeight: '600',
-  },
-  smallBadgeText: {
-    color: colors.text.inverse,
-    fontSize: 9,
-    fontWeight: '600',
-  },
-  timeText: {
-    fontSize: fontSizes.xs,
-  },
-  floorTag: {
-    backgroundColor: colors.background.default,
-    paddingHorizontal: spacing.xs,
-    paddingVertical: 2,
-    borderRadius: borderRadius.sm,
-  },
-  floorText: {
-    fontSize: fontSizes.xs,
-  },
-  replyReference: {
-    marginBottom: spacing.xs,
-  },
-  commentContent: {
-    marginBottom: spacing.xs,
-  },
-  text: {
-    lineHeight: 20,
-    fontSize: fontSizes.md,
-  },
-  actions: {
-    flexDirection: 'row',
-    alignItems: 'center',
-  },
-  actionButton: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginRight: spacing.md,
-    paddingVertical: spacing.xs,
-  },
-  actionText: {
-    marginLeft: 2,
-    fontSize: fontSizes.xs,
-  },
-  subRepliesContainer: {
-    marginTop: spacing.sm,
-    backgroundColor: colors.background.default,
-    borderRadius: borderRadius.md,
-    padding: spacing.sm,
-  },
-  subReplyItem: {
-    flexDirection: 'row',
-    alignItems: 'flex-start',
-    marginBottom: spacing.sm,
-  },
-  subReplyContent: {
-    flex: 1,
-    marginLeft: spacing.xs,
-  },
-  subReplyHeader: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginBottom: 2,
-  },
-  subReplyAuthor: {
-    fontWeight: '600',
-    color: colors.text.primary,
-    marginRight: spacing.xs,
-  },
-  moreRepliesButton: {
-    marginTop: spacing.xs,
-    paddingVertical: spacing.xs,
-  },
-  replyToText: {
-    fontSize: fontSizes.xs,
-  },
-  replyToName: {
-    fontSize: fontSizes.xs,
-    fontWeight: '500',
-  },
-  subReplyActions: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginTop: spacing.xs,
-  },
-});
-
 export default CommentItem;

src/components/business/NotificationItem.tsx

@@ -1,147 +0,0 @@
-/**
- * NotificationItem 通知项组件
- * 根据通知类型显示不同图标和内容
- *
- * @deprecated 请使用 SystemMessageItem 组件代替
- * 该组件使用旧的 Notification 类型，新功能请使用 SystemMessageItem
- */
-
-import React from 'react';
-import { View, TouchableOpacity, StyleSheet } from 'react-native';
-import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { formatDistanceToNow } from 'date-fns';
-import { zhCN } from 'date-fns/locale';
-import { colors, spacing, borderRadius } from '../../theme';
-import { Notification, NotificationType } from '../../types';
-import Text from '../common/Text';
-import Avatar from '../common/Avatar';
-
-interface NotificationItemProps {
-  notification: Notification;
-  onPress: () => void;
-}
-
-// 通知类型到图标和颜色的映射
-const getNotificationIcon = (type: NotificationType): { icon: string; color: string } => {
-  switch (type) {
-    case 'like_post':
-      return { icon: 'heart', color: colors.error.main };
-    case 'like_comment':
-      return { icon: 'heart', color: colors.error.main };
-    case 'comment':
-      return { icon: 'comment', color: colors.info.main };
-    case 'reply':
-      return { icon: 'reply', color: colors.info.main };
-    case 'follow':
-      return { icon: 'account-plus', color: colors.primary.main };
-    case 'mention':
-      return { icon: 'at', color: colors.warning.main };
-    case 'system':
-      return { icon: 'information', color: colors.text.secondary };
-    default:
-      return { icon: 'bell', color: colors.text.secondary };
-  }
-};
-
-const NotificationItem: React.FC<NotificationItemProps> = ({
-  notification,
-  onPress,
-}) => {
-  // 格式化时间
-  const formatTime = (dateString: string): string => {
-    try {
-      return formatDistanceToNow(new Date(dateString), {
-        addSuffix: true,
-        locale: zhCN,
-      });
-    } catch {
-      return '';
-    }
-  };
-
-  const { icon, color } = getNotificationIcon(notification.type);
-
-  return (
-    <TouchableOpacity
-      style={[styles.container, !notification.isRead && styles.unread]}
-      onPress={onPress}
-      activeOpacity={0.7}
-    >
-      {/* 通知图标/头像 */}
-      <View style={styles.iconContainer}>
-        {notification.type === 'follow' && notification.data.userId ? (
-          <Avatar
-            source={null}
-            size={40}
-            name={notification.title}
-          />
-        ) : (
-          <View style={[styles.iconWrapper, { backgroundColor: color + '20' }]}>
-            <MaterialCommunityIcons name={icon as any} size={20} color={color} />
-          </View>
-        )}
-      </View>
-
-      {/* 通知内容 */}
-      <View style={styles.content}>
-        <View style={styles.textContainer}>
-          <Text
-            variant="body"
-            numberOfLines={2}
-            style={!notification.isRead ? styles.unreadText : undefined}
-          >
-            {notification.content}
-          </Text>
-        </View>
-        <Text variant="caption" color={colors.text.secondary}>
-          {formatTime(notification.createdAt)}
-        </Text>
-      </View>
-
-      {/* 未读标记 */}
-      {!notification.isRead && <View style={styles.unreadDot} />}
-    </TouchableOpacity>
-  );
-};
-
-const styles = StyleSheet.create({
-  container: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    padding: spacing.lg,
-    backgroundColor: colors.background.paper,
-    borderBottomWidth: 1,
-    borderBottomColor: colors.divider,
-  },
-  unread: {
-    backgroundColor: colors.primary.light + '10',
-  },
-  iconContainer: {
-    marginRight: spacing.md,
-  },
-  iconWrapper: {
-    width: 40,
-    height: 40,
-    borderRadius: 20,
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  content: {
-    flex: 1,
-  },
-  textContainer: {
-    marginBottom: spacing.xs,
-  },
-  unreadText: {
-    fontWeight: '600',
-  },
-  unreadDot: {
-    width: 8,
-    height: 8,
-    borderRadius: 4,
-    backgroundColor: colors.primary.main,
-    marginLeft: spacing.sm,
-  },
-});
-
-export default NotificationItem;

src/components/business/PostCard.tsx

@@ -1,929 +0,0 @@
-/**
- * PostCard 帖子卡片组件 - QQ频道风格（响应式版本）
- * 简洁的帖子展示，无卡片边框
- * 支持响应式布局，宽屏下优化显示
- */
-
-import React, { useState, useCallback, useMemo } from 'react';
-import {
-  View,
-  TouchableOpacity,
-  StyleSheet,
-  Alert,
-  useWindowDimensions,
-} from 'react-native';
-import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, spacing, fontSizes, borderRadius } from '../../theme';
-import { Post } from '../../types';
-import Text from '../common/Text';
-import Avatar from '../common/Avatar';
-import { ImageGrid, ImageGridItem, SmartImage } from '../common';
-import VotePreview from './VotePreview';
-import { useResponsive, useResponsiveValue } from '../../hooks/useResponsive';
-import { getPreviewImageUrl, ImageDisplayMode } from '../../utils/imageHelper';
-
-interface PostCardProps {
-  post: Post;
-  onPress: () => void;
-  onUserPress: () => void;
-  onLike: () => void;
-  onComment: () => void;
-  onBookmark: () => void;
-  onShare: () => void;
-  onImagePress?: (images: ImageGridItem[], index: number) => void;
-  onDelete?: () => void;
-  compact?: boolean;
-  index?: number;
-  isAuthor?: boolean;
-  isPostAuthor?: boolean; // 当前用户是否为帖子作者
-  variant?: 'default' | 'grid';
-}
-
-const PostCard: React.FC<PostCardProps> = ({
-  post,
-  onPress,
-  onUserPress,
-  onLike,
-  onComment,
-  onBookmark,
-  onShare,
-  onImagePress,
-  onDelete,
-  compact = false,
-  index,
-  isAuthor = false,
-  isPostAuthor = false,
-  variant = 'default',
-}) => {
-  const [isExpanded, setIsExpanded] = useState(false);
-  const [isDeleting, setIsDeleting] = useState(false);
-
-  // 使用响应式 hook
-  const { 
-    width, 
-    isMobile, 
-    isTablet, 
-    isDesktop, 
-    isWideScreen,
-    isLandscape,
-    orientation 
-  } = useResponsive();
-  
-  const { width: windowWidth } = useWindowDimensions();
-
-  // 响应式字体大小
-  const responsiveFontSize = useResponsiveValue({
-    xs: fontSizes.md,
-    sm: fontSizes.md,
-    md: fontSizes.lg,
-    lg: isLandscape ? fontSizes.lg : fontSizes.xl,
-    xl: fontSizes.xl,
-    '2xl': fontSizes.xl,
-    '3xl': fontSizes['2xl'],
-    '4xl': fontSizes['2xl'],
-  });
-
-  // 响应式标题字体大小
-  const responsiveTitleFontSize = useResponsiveValue({
-    xs: fontSizes.lg,
-    sm: fontSizes.lg,
-    md: fontSizes.xl,
-    lg: isLandscape ? fontSizes.xl : fontSizes['2xl'],
-    xl: fontSizes['2xl'],
-    '2xl': fontSizes['2xl'],
-    '3xl': fontSizes['3xl'],
-    '4xl': fontSizes['3xl'],
-  });
-
-  // 响应式头像大小
-  const avatarSize = useResponsiveValue({
-    xs: 36,
-    sm: 38,
-    md: 40,
-    lg: 44,
-    xl: 48,
-    '2xl': 48,
-    '3xl': 52,
-    '4xl': 56,
-  });
-
-  // 响应式内边距 - 宽屏下增加更多内边距
-  const responsivePadding = useResponsiveValue({
-    xs: spacing.md,
-    sm: spacing.md,
-    md: spacing.lg,
-    lg: spacing.xl,
-    xl: spacing.xl * 1.2,
-    '2xl': spacing.xl * 1.5,
-    '3xl': spacing.xl * 2,
-    '4xl': spacing.xl * 2.5,
-  });
-
-  // 宽屏下额外的卡片内边距
-  const cardPadding = useMemo(() => {
-    if (isWideScreen) return spacing.xl;
-    if (isDesktop) return spacing.lg;
-    if (isTablet) return spacing.md;
-    return 0; // 移动端无额外内边距
-  }, [isWideScreen, isDesktop, isTablet]);
-
-  const formatDateTime = (dateString?: string | null): string => {
-    if (!dateString) return '';
-    const date = new Date(dateString);
-    if (Number.isNaN(date.getTime())) return '';
-    const pad = (num: number) => String(num).padStart(2, '0');
-    return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}`;
-  };
-
-  const isPostEdited = (createdAt?: string, updatedAt?: string): boolean => {
-    if (!createdAt || !updatedAt) return false;
-    const created = new Date(createdAt).getTime();
-    const updated = new Date(updatedAt).getTime();
-    if (Number.isNaN(created) || Number.isNaN(updated)) return false;
-    return updated - created > 1000;
-  };
-
-  const getTruncatedContent = (content: string | undefined | null, maxLength: number = 100): string => {
-    if (!content) return '';
-    if (content.length <= maxLength || isExpanded) return content;
-    return content.substring(0, maxLength) + '...';
-  };
-
-  // 宽屏下显示更多内容
-  const getResponsiveMaxLength = () => {
-    if (isWideScreen) return 300;
-    if (isDesktop) return 250;
-    if (isTablet) return 200;
-    return 100;
-  };
-
-  const formatNumber = (num: number): string => {
-    if (num >= 10000) {
-      return (num / 10000).toFixed(1) + 'w';
-    }
-    if (num >= 1000) {
-      return (num / 1000).toFixed(1) + 'k';
-    }
-    return num.toString();
-  };
-
-  // 处理删除帖子
-  const handleDelete = () => {
-    if (!onDelete || isDeleting) return;
-    
-    Alert.alert(
-      '删除帖子',
-      '确定要删除这篇帖子吗？删除后将无法恢复。',
-      [
-        {
-          text: '取消',
-          style: 'cancel',
-        },
-        {
-          text: '删除',
-          style: 'destructive',
-          onPress: async () => {
-            setIsDeleting(true);
-            try {
-              await onDelete();
-            } catch (error) {
-              console.error('删除帖子失败:', error);
-              Alert.alert('删除失败', '删除帖子时发生错误，请稍后重试');
-            } finally {
-              setIsDeleting(false);
-            }
-          },
-        },
-      ],
-    );
-  };
-
-  // 渲染图片 - 使用新的 ImageGrid 组件
-  const renderImages = () => {
-    if (!post.images || !Array.isArray(post.images) || post.images.length === 0) return null;
-
-    // 转换图片数据格式
-    const gridImages: ImageGridItem[] = post.images.map(img => ({
-      id: img.id,
-      url: img.url,
-      thumbnail_url: img.thumbnail_url,
-      preview_url: img.preview_url,
-      preview_url_large: img.preview_url_large,
-      width: img.width,
-      height: img.height,
-    }));
-
-    // 宽屏下显示更大的图片
-    const imageGap = isDesktop ? 12 : isTablet ? 8 : 4;
-    const imageBorderRadius = isDesktop ? borderRadius.xl : borderRadius.md;
-
-    return (
-      <View style={styles.imagesContainer}>
-        <ImageGrid
-          images={gridImages}
-          maxDisplayCount={isWideScreen ? 12 : 9}
-          mode="auto"
-          gap={imageGap}
-          borderRadius={imageBorderRadius}
-          showMoreOverlay={true}
-          onImagePress={onImagePress}
-          displayMode={variant === 'grid' ? 'grid' : 'list'}
-          usePreview={true}
-        />
-      </View>
-    );
-  };
-
-  const renderBadges = () => {
-    const badges = [];
-    
-    if (isAuthor) {
-      badges.push(
-        <View key="author" style={[styles.badge, styles.authorBadge]}>
-          <Text variant="caption" style={styles.badgeText}>楼主</Text>
-        </View>
-      );
-    }
-    
-    if (post.author?.id === '1') {
-      badges.push(
-        <View key="admin" style={[styles.badge, styles.adminBadge]}>
-          <Text variant="caption" style={styles.badgeText}>管理员</Text>
-        </View>
-      );
-    }
-    
-    return badges;
-  };
-
-  const renderTopComment = () => {
-    if (!post.top_comment) return null;
-    
-    const { top_comment } = post;
-    
-    const topCommentContainerStyles = [
-      styles.topCommentContainer,
-      ...(isDesktop ? [styles.topCommentContainerWide] : [])
-    ];
-    
-    const topCommentAuthorStyles = [
-      styles.topCommentAuthor,
-      ...(isDesktop ? [styles.topCommentAuthorWide] : [])
-    ];
-    
-    const topCommentTextStyles = [
-      styles.topCommentText,
-      ...(isDesktop ? [styles.topCommentTextWide] : [])
-    ];
-    
-    const moreCommentsStyles = [
-      styles.moreComments,
-      ...(isDesktop ? [styles.moreCommentsWide] : [])
-    ];
-    
-    return (
-      <View style={topCommentContainerStyles}>
-        <View style={styles.topCommentContent}>
-          <Text
-            variant="caption"
-            color={colors.text.secondary}
-            style={topCommentAuthorStyles}
-          >
-            {top_comment.author?.nickname || '匿名用户'}:
-          </Text>
-          <Text
-            variant="caption"
-            color={colors.text.secondary}
-            style={topCommentTextStyles}
-            numberOfLines={isDesktop ? 2 : 1}
-          >
-            {top_comment.content}
-          </Text>
-        </View>
-        {post.comments_count > 1 && (
-          <Text
-            variant="caption"
-            color={colors.primary.main}
-            style={moreCommentsStyles}
-          >
-            查看全部{formatNumber(post.comments_count)}条评论
-          </Text>
-        )}
-      </View>
-    );
-  };
-
-  // 渲染投票预览
-  const renderVotePreview = () => {
-    if (!post.is_vote) return null;
-    
-    return (
-      <VotePreview
-        onPress={onPress}
-      />
-    );
-  };
-
-  // 渲染小红书风格的两栏卡片
-  const renderGridVariant = () => {
-    // 获取封面图（第一张图）
-    const coverImage = post.images && Array.isArray(post.images) && post.images.length > 0 ? post.images[0] : null;
-    const hasImage = !!coverImage;
-
-    // 防御性检查：确保 author 存在
-    const author = post.author || { id: '', nickname: '匿名用户', avatar: null, username: '' };
-
-    // 根据图片实际宽高比或使用随机值创建错落感
-    // 使用帖子 ID 生成一个伪随机值，确保每次渲染一致但不同帖子有差异
-    const postId = post.id || '';
-    const hash = postId.split('').reduce((a, b) => a + b.charCodeAt(0), 0);
-    const aspectRatios = [0.7, 0.75, 0.8, 0.85, 0.9, 1, 1.1, 1.2];
-    const aspectRatio = aspectRatios[hash % aspectRatios.length];
-
-    // 获取封面图预览 URL
-    const coverUrl = hasImage
-      ? getPreviewImageUrl(coverImage, 'grid')
-      : '';
-
-    // 获取正文预览（无图时显示）
-    const getContentPreview = (content: string | undefined | null): string => {
-      if (!content) return '';
-      // 移除 Markdown 标记和多余空白
-      return content
-        .replace(/[#*_~`\[\]()]/g, '')
-        .replace(/\n+/g, ' ')
-        .trim();
-    };
-
-    const contentPreview = getContentPreview(post.content);
-
-    // 响应式字体大小（网格模式）
-    const gridTitleFontSize = isDesktop ? 16 : isTablet ? 15 : 14;
-    const gridUsernameFontSize = isDesktop ? 14 : 12;
-    const gridLikeFontSize = isDesktop ? 14 : 12;
-
-    return (
-      <TouchableOpacity 
-        style={[
-          styles.gridContainer, 
-          !hasImage && styles.gridContainerNoImage,
-          isDesktop && styles.gridContainerDesktop
-        ]} 
-        onPress={onPress} 
-        activeOpacity={0.9}
-      >
-        {/* 封面图 - 只有有图片时才渲染，无图时不显示占位区域 */}
-        {hasImage && (
-          <TouchableOpacity
-            activeOpacity={0.8}
-            onPress={() => onImagePress?.(post.images || [], 0)}
-          >
-            <SmartImage
-              source={{ uri: coverUrl }}
-              style={[styles.gridCoverImage, { aspectRatio }]}
-              resizeMode="cover"
-              usePreview={true}
-            />
-          </TouchableOpacity>
-        )}
-
-        {/* 无图时的正文预览区域 */}
-        {!hasImage && contentPreview && (
-          <View style={[styles.gridContentPreview, isDesktop ? styles.gridContentPreviewDesktop : null]}>
-            <Text
-              style={[styles.gridContentText, ...(isDesktop ? [styles.gridContentTextDesktop] : [])]}
-              numberOfLines={isDesktop ? 8 : 6}
-            >
-              {contentPreview}
-            </Text>
-          </View>
-        )}
-
-        {/* 投票标识 */}
-        {post.is_vote && (
-          <View style={styles.gridVoteBadge}>
-            <MaterialCommunityIcons name="vote" size={isDesktop ? 14 : 12} color={colors.primary.contrast} />
-            <Text style={styles.gridVoteBadgeText}>投票</Text>
-          </View>
-        )}
-
-        {/* 标题 - 无图时显示更多行 */}
-        {post.title && (
-          <Text
-            style={[
-              styles.gridTitle,
-              { fontSize: gridTitleFontSize },
-              ...(hasImage ? [] : [styles.gridTitleNoImage]),
-              ...(isDesktop ? [styles.gridTitleDesktop] : [])
-            ]}
-            numberOfLines={hasImage ? 2 : 3}
-          >
-            {post.title}
-          </Text>
-        )}
-
-        {/* 底部信息 */}
-        <View style={[styles.gridFooter, isDesktop && styles.gridFooterDesktop]}>
-          <TouchableOpacity style={styles.gridUserInfo} onPress={onUserPress}>
-            <Avatar
-              source={author.avatar}
-              size={isDesktop ? 24 : 20}
-              name={author.nickname}
-            />
-            <Text style={[styles.gridUsername, { fontSize: gridUsernameFontSize }]} numberOfLines={1}>
-              {author.nickname}
-            </Text>
-          </TouchableOpacity>
-
-          <View style={styles.gridLikeInfo}>
-            <MaterialCommunityIcons name="heart" size={isDesktop ? 16 : 14} color="#666" />
-            <Text style={[styles.gridLikeCount, { fontSize: gridLikeFontSize }]}>
-              {formatNumber(post.likes_count)}
-            </Text>
-          </View>
-        </View>
-      </TouchableOpacity>
-    );
-  };
-
-  // 根据 variant 渲染不同样式
-  if (variant === 'grid') {
-    return renderGridVariant();
-  }
-
-  // 防御性检查：确保 author 存在
-  const author = post.author || { id: '', nickname: '匿名用户', avatar: null, username: '' };
-
-  // 计算响应式内容最大行数
-  const contentNumberOfLines = useMemo(() => {
-    if (isWideScreen) return 8;
-    if (isDesktop) return 6;
-    if (isTablet) return 5;
-    return 3;
-  }, [isWideScreen, isDesktop, isTablet]);
-
-  return (
-    <TouchableOpacity
-      style={[
-        styles.container,
-        {
-          paddingHorizontal: responsivePadding,
-          paddingVertical: responsivePadding * 0.75,
-          ...(isDesktop || isWideScreen ? {
-            borderRadius: borderRadius.lg,
-            marginHorizontal: cardPadding,
-            marginVertical: spacing.sm,
-            shadowColor: '#000',
-            shadowOffset: { width: 0, height: 2 },
-            shadowOpacity: 0.08,
-            shadowRadius: 8,
-            elevation: 3,
-          } : {})
-        }
-      ]}
-      onPress={onPress}
-      activeOpacity={0.9}
-    >
-      {/* 用户信息 */}
-      <View style={styles.userSection}>
-        <TouchableOpacity onPress={onUserPress}>
-          <Avatar
-            source={author.avatar}
-            size={avatarSize}
-            name={author.nickname}
-          />
-        </TouchableOpacity>
-        <View style={styles.userInfo}>
-          <View style={styles.userNameRow}>
-            <TouchableOpacity onPress={onUserPress}>
-              <Text 
-                variant="body" 
-                style={[
-                  styles.username, 
-                  { fontSize: isDesktop ? fontSizes.lg : fontSizes.md }
-                ]}
-              >
-                {author.nickname}
-              </Text>
-            </TouchableOpacity>
-            {renderBadges()}
-          </View>
-          <View style={styles.postMeta}>
-            <Text variant="caption" color={colors.text.hint} style={styles.timeText}>
-              发布 {formatDateTime(post.created_at)}
-            </Text>
-            {isPostEdited(post.created_at, post.updated_at) && (
-              <Text variant="caption" color={colors.text.hint} style={styles.timeText}>
-                {' · 修改 '}{formatDateTime(post.updated_at)}
-              </Text>
-            )}
-          </View>
-        </View>
-        {post.is_pinned && (
-          <View style={styles.pinnedTag}>
-            <MaterialCommunityIcons name="pin" size={isDesktop ? 14 : 12} color={colors.warning.main} />
-            <Text variant="caption" color={colors.warning.main} style={styles.pinnedText}>置顶</Text>
-          </View>
-        )}
-        {/* 删除按钮 - 只对帖子作者显示 */}
-        {isPostAuthor && onDelete && (
-          <TouchableOpacity
-            style={styles.deleteButton}
-            onPress={handleDelete}
-            disabled={isDeleting}
-          >
-            <MaterialCommunityIcons
-              name={isDeleting ? 'loading' : 'delete-outline'}
-              size={isDesktop ? 20 : 18}
-              color={colors.text.hint}
-            />
-          </TouchableOpacity>
-        )}
-      </View>
-
-      {/* 标题 */}
-      {post.title && (
-        <Text
-          variant="body"
-          numberOfLines={compact ? 2 : undefined}
-          style={[
-            styles.title, 
-            { fontSize: responsiveTitleFontSize, lineHeight: responsiveTitleFontSize * 1.4 }
-          ]}
-        >
-          {post.title}
-        </Text>
-      )}
-
-      {/* 内容 */}
-      {!compact && (
-        <>
-          <Text
-            variant="body"
-            color={colors.text.secondary}
-            numberOfLines={isExpanded ? undefined : contentNumberOfLines}
-            style={[
-              styles.content, 
-              { fontSize: responsiveFontSize, lineHeight: responsiveFontSize * 1.5 }
-            ]}
-          >
-            {getTruncatedContent(post.content, getResponsiveMaxLength())}
-          </Text>
-          {post.content && post.content.length > getResponsiveMaxLength() && (
-            <TouchableOpacity
-              onPress={() => setIsExpanded(!isExpanded)}
-              style={styles.expandButton}
-            >
-              <Text variant="caption" color={colors.primary.main}>
-                {isExpanded ? '收起' : '展开全文'}
-              </Text>
-            </TouchableOpacity>
-          )}
-        </>
-      )}
-
-      {/* 图片 */}
-      {renderImages()}
-
-      {/* 投票预览 */}
-      {renderVotePreview()}
-
-      {/* 热门评论预览 */}
-      {renderTopComment()}
-
-      {/* 交互按钮 */}
-      <View style={[styles.actionBar, isDesktop ? styles.actionBarWide : null]}>
-        <View style={styles.viewCount}>
-          <MaterialCommunityIcons name="eye-outline" size={isDesktop ? 18 : 16} color={colors.text.hint} />
-          <Text
-            variant="caption"
-            color={colors.text.hint}
-            style={[styles.actionText, ...(isDesktop ? [styles.actionTextWide] : [])]}
-          >
-            {formatNumber(post.views_count || 0)}
-          </Text>
-        </View>
-        
-        <View style={styles.actionButtons}>
-          <TouchableOpacity style={[styles.actionButton, ...(isDesktop ? [styles.actionButtonWide] : [])]} onPress={onLike}>
-            <MaterialCommunityIcons
-              name={post.is_liked ? 'heart' : 'heart-outline'}
-              size={isDesktop ? 22 : 19}
-              color={post.is_liked ? colors.error.main : colors.text.secondary}
-            />
-            <Text
-              variant="caption"
-              color={post.is_liked ? colors.error.main : colors.text.secondary}
-              style={[styles.actionText, ...(isDesktop ? [styles.actionTextWide] : [])]}
-            >
-              {post.likes_count > 0 ? formatNumber(post.likes_count) : '赞'}
-            </Text>
-          </TouchableOpacity>
-
-          <TouchableOpacity style={[styles.actionButton, ...(isDesktop ? [styles.actionButtonWide] : [])]} onPress={onComment}>
-            <MaterialCommunityIcons
-              name="comment-outline"
-              size={isDesktop ? 22 : 19}
-              color={colors.text.secondary}
-            />
-            <Text variant="caption" color={colors.text.secondary} style={[styles.actionText, ...(isDesktop ? [styles.actionTextWide] : [])]}>
-              {post.comments_count > 0 ? formatNumber(post.comments_count) : '评论'}
-            </Text>
-          </TouchableOpacity>
-
-          <TouchableOpacity style={[styles.actionButton, ...(isDesktop ? [styles.actionButtonWide] : [])]} onPress={onShare}>
-            <MaterialCommunityIcons
-              name="share-outline"
-              size={isDesktop ? 22 : 19}
-              color={colors.text.secondary}
-            />
-          </TouchableOpacity>
-
-          <TouchableOpacity style={[styles.actionButton, isDesktop && styles.actionButtonWide]} onPress={onBookmark}>
-            <MaterialCommunityIcons
-              name={post.is_favorited ? 'bookmark' : 'bookmark-outline'}
-              size={isDesktop ? 22 : 19}
-              color={post.is_favorited ? colors.warning.main : colors.text.secondary}
-            />
-          </TouchableOpacity>
-        </View>
-      </View>
-    </TouchableOpacity>
-  );
-};
-
-const styles = StyleSheet.create({
-  container: {
-    backgroundColor: colors.background.paper,
-    borderBottomWidth: StyleSheet.hairlineWidth,
-    borderBottomColor: colors.divider,
-  },
-  // 宽屏卡片样式
-  wideCard: {
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.lg,
-    shadowColor: '#000',
-    shadowOffset: { width: 0, height: 2 },
-    shadowOpacity: 0.08,
-    shadowRadius: 8,
-    elevation: 3,
-  },
-  userSection: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginBottom: spacing.sm,
-  },
-  userInfo: {
-    flex: 1,
-    marginLeft: spacing.sm,
-  },
-  userNameRow: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    flexWrap: 'wrap',
-  },
-  username: {
-    fontWeight: '600',
-    color: colors.text.primary,
-  },
-  badge: {
-    paddingHorizontal: 4,
-    paddingVertical: 1,
-    borderRadius: 2,
-    marginLeft: spacing.xs,
-  },
-  authorBadge: {
-    backgroundColor: colors.primary.main,
-  },
-  adminBadge: {
-    backgroundColor: colors.error.main,
-  },
-  badgeText: {
-    color: colors.text.inverse,
-    fontSize: fontSizes.xs,
-    fontWeight: '600',
-  },
-  postMeta: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginTop: 2,
-  },
-  timeText: {
-    fontSize: fontSizes.sm,
-    color: colors.text.hint,
-  },
-  pinnedTag: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    backgroundColor: colors.warning.light + '20',
-    paddingHorizontal: spacing.xs,
-    paddingVertical: 2,
-    borderRadius: borderRadius.sm,
-  },
-  pinnedText: {
-    marginLeft: 2,
-    fontSize: fontSizes.xs,
-    fontWeight: '500',
-  },
-  deleteButton: {
-    padding: spacing.xs,
-    marginLeft: spacing.sm,
-  },
-  title: {
-    marginBottom: spacing.xs,
-    fontWeight: '600',
-    color: colors.text.primary,
-  },
-  content: {
-    marginBottom: spacing.xs,
-    color: colors.text.secondary,
-  },
-  expandButton: {
-    marginBottom: spacing.sm,
-  },
-  imagesContainer: {
-    marginBottom: spacing.md,
-  },
-  topCommentContainer: {
-    backgroundColor: colors.background.default,
-    borderRadius: borderRadius.sm,
-    padding: spacing.sm,
-    marginBottom: spacing.sm,
-  },
-  topCommentContainerWide: {
-    padding: spacing.md,
-    borderRadius: borderRadius.md,
-  },
-  topCommentContent: {
-    flexDirection: 'row',
-    alignItems: 'center',
-  },
-  topCommentAuthor: {
-    fontWeight: '600',
-    marginRight: spacing.xs,
-  },
-  topCommentAuthorWide: {
-    fontSize: fontSizes.sm,
-  },
-  topCommentText: {
-    flex: 1,
-  },
-  topCommentTextWide: {
-    fontSize: fontSizes.sm,
-  },
-  moreComments: {
-    marginTop: spacing.xs,
-    fontWeight: '500',
-  },
-  moreCommentsWide: {
-    fontSize: fontSizes.sm,
-    marginTop: spacing.sm,
-  },
-  actionBar: {
-    flexDirection: 'row',
-    justifyContent: 'space-between',
-    alignItems: 'center',
-  },
-  actionBarWide: {
-    marginTop: spacing.sm,
-    paddingTop: spacing.sm,
-  },
-  viewCount: {
-    flexDirection: 'row',
-    alignItems: 'center',
-  },
-  actionButtons: {
-    flexDirection: 'row',
-    alignItems: 'center',
-  },
-  actionButton: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginLeft: spacing.md,
-    paddingVertical: spacing.xs,
-  },
-  actionButtonWide: {
-    marginLeft: spacing.lg,
-    paddingVertical: spacing.sm,
-  },
-  actionText: {
-    marginLeft: 6,
-  },
-  actionTextWide: {
-    fontSize: fontSizes.md,
-  },
-  
-  // ========== 小红书风格两栏样式 ==========
-  gridContainer: {
-    backgroundColor: '#FFF',
-    overflow: 'hidden',
-    borderRadius: 8,
-  },
-  gridContainerDesktop: {
-    borderRadius: 12,
-  },
-  gridContainerNoImage: {
-    minHeight: 200,
-    justifyContent: 'space-between',
-  },
-  gridCoverImage: {
-    width: '100%',
-    aspectRatio: 0.7,
-    backgroundColor: '#F5F5F5',
-  },
-  gridCoverPlaceholder: {
-    width: '100%',
-    aspectRatio: 0.7,
-    backgroundColor: '#F5F5F5',
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  // 无图时的正文预览区域
-  gridContentPreview: {
-    backgroundColor: '#F8F8F8',
-    margin: 4,
-    padding: 8,
-    borderRadius: 8,
-    minHeight: 100,
-  },
-  gridContentPreviewDesktop: {
-    margin: 8,
-    padding: 12,
-    borderRadius: 12,
-    minHeight: 150,
-  },
-  gridContentText: {
-    fontSize: 13,
-    color: '#666',
-    lineHeight: 20,
-  },
-  gridContentTextDesktop: {
-    fontSize: 15,
-    lineHeight: 24,
-  },
-  gridTitle: {
-    color: '#333',
-    lineHeight: 20,
-    paddingHorizontal: 4,
-    paddingTop: 8,
-    minHeight: 44,
-  },
-  gridTitleNoImage: {
-    minHeight: 0,
-    paddingTop: 4,
-  },
-  gridTitleDesktop: {
-    paddingHorizontal: 8,
-    paddingTop: 12,
-    lineHeight: 24,
-    minHeight: 56,
-  },
-  gridFooter: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    justifyContent: 'space-between',
-    paddingHorizontal: 4,
-    paddingVertical: 8,
-  },
-  gridFooterDesktop: {
-    paddingHorizontal: 8,
-    paddingVertical: 12,
-  },
-  gridUserInfo: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    flex: 1,
-  },
-  gridUsername: {
-    color: '#666',
-    marginLeft: 6,
-    flex: 1,
-  },
-  gridLikeInfo: {
-    flexDirection: 'row',
-    alignItems: 'center',
-  },
-  gridLikeCount: {
-    color: '#666',
-    marginLeft: 4,
-  },
-  gridVoteBadge: {
-    position: 'absolute',
-    top: 8,
-    right: 8,
-    flexDirection: 'row',
-    alignItems: 'center',
-    backgroundColor: colors.primary.main + 'CC',
-    paddingHorizontal: 8,
-    paddingVertical: 4,
-    borderRadius: borderRadius.full,
-    gap: 4,
-  },
-  gridVoteBadgeText: {
-    fontSize: 10,
-    color: colors.primary.contrast,
-    fontWeight: '600',
-  },
-});
-
-export default PostCard;

src/components/business/PostCard/PostCard.tsx

@@ -0,0 +1,713 @@
+/**
+ * PostCard 主组件
+ * 帖子卡片组件（新实现）
+ *
+ * @example
+ * // 新 API 使用方式
+ * <PostCard
+ *   post={post}
+ *   onAction={(action) => handleAction(post, action)}
+ *   variant="list"
+ *   features="full"
+ * />
+ */
+
+import React, { useMemo, useState, memo, useEffect } from 'react';
+import { View, TouchableOpacity, StyleSheet, Alert, TextStyle } from 'react-native';
+import { MaterialCommunityIcons } from '@expo/vector-icons';
+import { PostCardProps, PostCardAction } from './types';
+import { ImageGridItem, SmartImage } from '../../common';
+import Text from '../../common/Text';
+import Avatar from '../../common/Avatar';
+import { spacing, borderRadius, fontSizes, useAppColors, type AppColors } from '../../../theme';
+import { getPreviewImageUrl } from '../../../utils/imageHelper';
+import PostImages from './components/PostImages';
+import { useResponsive } from '../../../hooks/useResponsive';
+import { formatPostCreatedAtString } from '../../../core/entities/Post';
+
+/** 列表相对时间：独立定时刷新，避免外层 PostCard.memo 挡住「分钟前」更新 */
+const PostCardRelativeTime: React.FC<{ createdAt?: string | null; style?: TextStyle | TextStyle[] }> = ({
+  createdAt,
+  style: timeStyle,
+}) => {
+  const [label, setLabel] = useState(() => formatPostCreatedAtString(createdAt));
+
+  useEffect(() => {
+    setLabel(formatPostCreatedAtString(createdAt));
+    const tick = () => setLabel(formatPostCreatedAtString(createdAt));
+    const id = setInterval(tick, 60_000);
+    return () => clearInterval(id);
+  }, [createdAt]);
+
+  return (
+    <Text style={timeStyle} numberOfLines={1}>
+      {label}
+    </Text>
+  );
+};
+
+function imagesSignature(
+  images: PostCardProps['post']['images'] | undefined
+): string {
+  if (!images?.length) return '';
+  return images.map((i) => i.id).join('\u001f');
+}
+
+function authorSignature(author: PostCardProps['post']['author']): string {
+  if (!author) return '';
+  return [author.id, author.nickname ?? '', author.avatar ?? ''].join('\u001f');
+}
+
+function topCommentSignature(tc: PostCardProps['post']['top_comment']): string {
+  if (!tc) return '';
+  return [tc.id, tc.content ?? '', tc.author?.id ?? ''].join('\u001f');
+}
+
+function channelSignature(ch: PostCardProps['post']['channel']): string {
+  if (!ch) return '';
+  return [ch.id, ch.name ?? ''].join('\u001f');
+}
+
+function featuresComparable(f: PostCardProps['features']): string {
+  if (f == null) return '';
+  if (typeof f === 'string') return f;
+  return JSON.stringify(f);
+}
+
+/**
+ * 自定义比较：忽略 onAction 引用（父组件应用 postId + ref 解析最新 post，避免 Tab 切换时全列表因回调重建而重绘）。
+ * index 未参与 UI，不比较以免列表重排时多余更新。
+ */
+function arePostCardPropsEqual(prev: PostCardProps, next: PostCardProps): boolean {
+  if (prev.variant !== next.variant) return false;
+  if (prev.isPostAuthor !== next.isPostAuthor) return false;
+  if (prev.isAuthor !== next.isAuthor) return false;
+  if (prev.style !== next.style) return false;
+  if (featuresComparable(prev.features) !== featuresComparable(next.features)) return false;
+
+  const a = prev.post;
+  const b = next.post;
+  if (a === b) return true;
+
+  if (a.id !== b.id) return false;
+  if (a.title !== b.title) return false;
+  if (a.content !== b.content) return false;
+  if ((a.likes_count ?? 0) !== (b.likes_count ?? 0)) return false;
+  if ((a.comments_count ?? 0) !== (b.comments_count ?? 0)) return false;
+  if ((a.favorites_count ?? 0) !== (b.favorites_count ?? 0)) return false;
+  if ((a.shares_count ?? 0) !== (b.shares_count ?? 0)) return false;
+  if ((a.views_count ?? 0) !== (b.views_count ?? 0)) return false;
+  if (!!a.is_pinned !== !!b.is_pinned) return false;
+  if (!!a.is_locked !== !!b.is_locked) return false;
+  if (!!a.is_vote !== !!b.is_vote) return false;
+  if (a.created_at !== b.created_at) return false;
+  if (a.updated_at !== b.updated_at) return false;
+  if (a.content_edited_at !== b.content_edited_at) return false;
+  if (!!a.is_liked !== !!b.is_liked) return false;
+  if (!!a.is_favorited !== !!b.is_favorited) return false;
+  if (authorSignature(a.author) !== authorSignature(b.author)) return false;
+  if (imagesSignature(a.images) !== imagesSignature(b.images)) return false;
+  if (topCommentSignature(a.top_comment) !== topCommentSignature(b.top_comment)) return false;
+  if (channelSignature(a.channel) !== channelSignature(b.channel)) return false;
+
+  return true;
+}
+
+function createPostCardStyles(colors: AppColors) {
+  return StyleSheet.create({
+    card: {
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.lg,
+      padding: spacing.md,
+      borderWidth: StyleSheet.hairlineWidth,
+      borderColor: colors.divider,
+    },
+    header: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'space-between',
+      marginBottom: spacing.sm,
+    },
+    authorWrap: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      flex: 1,
+      minWidth: 0,
+    },
+    authorMeta: {
+      marginLeft: spacing.sm,
+      flex: 1,
+      minWidth: 0,
+    },
+    authorName: {
+      color: colors.text.primary,
+      fontWeight: '600',
+      fontSize: fontSizes.md,
+    },
+    timeText: {
+      color: colors.text.hint,
+      fontSize: fontSizes.xs,
+      marginTop: 2,
+    },
+    metaRow: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: 6,
+      marginTop: 2,
+      flexWrap: 'wrap',
+    },
+    channelTag: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      maxWidth: 140,
+      paddingHorizontal: 6,
+      paddingVertical: 2,
+      borderRadius: borderRadius.sm,
+      backgroundColor: `${colors.primary.main}12`,
+      gap: 4,
+    },
+    channelTagText: {
+      fontSize: fontSizes.xs,
+      color: colors.primary.main,
+      fontWeight: '600',
+      flexShrink: 1,
+    },
+    pinnedTag: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      backgroundColor: `${colors.warning.light}22`,
+      borderRadius: borderRadius.sm,
+      paddingHorizontal: 4,
+      paddingVertical: 1,
+      gap: 2,
+    },
+    pinnedText: {
+      color: colors.warning.main,
+      fontSize: fontSizes.xs,
+    },
+    badgeText: {
+      color: colors.primary.main,
+      fontSize: fontSizes.xs,
+      fontWeight: '600',
+    },
+    deleteButton: {
+      padding: spacing.xs,
+      marginLeft: spacing.sm,
+    },
+    title: {
+      color: colors.text.primary,
+      fontSize: fontSizes.lg,
+      fontWeight: '600',
+      marginBottom: spacing.xs,
+    },
+    content: {
+      color: colors.text.secondary,
+      fontSize: fontSizes.md,
+      marginBottom: spacing.xs,
+      lineHeight: fontSizes.md * 1.45,
+    },
+    expandBtn: {
+      marginBottom: spacing.sm,
+    },
+    expandText: {
+      color: colors.primary.main,
+      fontSize: fontSizes.sm,
+    },
+    topCommentBox: {
+      backgroundColor: colors.background.default,
+      borderRadius: borderRadius.sm,
+      paddingHorizontal: spacing.sm,
+      paddingVertical: spacing.xs,
+      marginBottom: spacing.sm,
+      flexDirection: 'row',
+      alignItems: 'center',
+    },
+    topCommentAuthor: {
+      color: colors.text.secondary,
+      fontSize: fontSizes.sm,
+      fontWeight: '600',
+      marginRight: 4,
+    },
+    topCommentText: {
+      color: colors.text.secondary,
+      fontSize: fontSizes.sm,
+      flex: 1,
+    },
+    gridCover: {
+      width: '100%',
+      aspectRatio: 0.78,
+      backgroundColor: colors.background.default,
+    },
+    actions: {
+      flexDirection: 'row',
+      justifyContent: 'space-between',
+      alignItems: 'center',
+    },
+    actionsLeading: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      flex: 1,
+      minWidth: 0,
+      marginRight: spacing.sm,
+      gap: spacing.sm,
+    },
+    channelTagAfterViews: {
+      maxWidth: 130,
+      flexShrink: 1,
+    },
+    viewsWrap: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      flexShrink: 0,
+    },
+    viewsText: {
+      color: colors.text.hint,
+      fontSize: fontSizes.sm,
+      marginLeft: 4,
+    },
+    actionButtons: {
+      flexDirection: 'row',
+      alignItems: 'center',
+    },
+    actionBtn: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginLeft: spacing.md,
+    },
+    actionText: {
+      color: colors.text.secondary,
+      fontSize: fontSizes.sm,
+      marginLeft: 4,
+    },
+    activeActionText: {
+      color: colors.error.main,
+    },
+    activeActionTextMerged: {
+      color: colors.error.main,
+      fontSize: fontSizes.sm,
+      marginLeft: 4,
+    },
+    gridRootCard: {
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.lg,
+      overflow: 'hidden',
+      borderWidth: StyleSheet.hairlineWidth,
+      borderColor: colors.divider,
+    },
+    gridNoImagePreview: {
+      backgroundColor: colors.background.default,
+      margin: 6,
+      borderRadius: borderRadius.md,
+      minHeight: 120,
+      padding: 8,
+    },
+    gridNoImageText: {
+      color: colors.text.secondary,
+      fontSize: fontSizes.sm,
+      lineHeight: 20,
+    },
+    gridVoteTag: {
+      position: 'absolute',
+      top: 8,
+      right: 8,
+      backgroundColor: `${colors.primary.main}CC`,
+      borderRadius: borderRadius.full,
+      paddingHorizontal: 8,
+      paddingVertical: 4,
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: 4,
+    },
+    gridVoteTagText: {
+      color: colors.primary.contrast,
+      fontSize: 10,
+      fontWeight: '600',
+    },
+    gridTitleMain: {
+      color: colors.text.primary,
+      fontSize: fontSizes.md,
+      lineHeight: 20,
+      paddingHorizontal: 8,
+      paddingTop: 8,
+      minHeight: 44,
+    },
+    gridChannelRow: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: 4,
+      paddingHorizontal: 8,
+      paddingTop: 4,
+      paddingBottom: 2,
+    },
+    gridChannelText: {
+      fontSize: fontSizes.xs,
+      color: colors.text.secondary,
+      fontWeight: '600',
+      flex: 1,
+      minWidth: 0,
+    },
+    gridFooter: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'space-between',
+      paddingHorizontal: 8,
+      paddingVertical: 10,
+    },
+    gridUserArea: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      flex: 1,
+      minWidth: 0,
+    },
+    gridUsername: {
+      color: colors.text.secondary,
+      fontSize: fontSizes.sm,
+      marginLeft: 6,
+      flex: 1,
+    },
+    gridLikeArea: {
+      flexDirection: 'row',
+      alignItems: 'center',
+    },
+    gridLikeCount: {
+      color: colors.text.secondary,
+      fontSize: fontSizes.sm,
+      marginLeft: 4,
+    },
+  });
+}
+
+/**
+ * PostCard 主组件
+ * 仅支持新 API
+ */
+const PostCardInner: React.FC<PostCardProps> = (normalizedProps) => {
+  const {
+    post,
+    onAction,
+    variant = 'list',
+    features,
+    isPostAuthor = false,
+    isAuthor = false,
+    index,
+    style,
+  } = normalizedProps;
+
+  const colors = useAppColors();
+  const styles = useMemo(() => createPostCardStyles(colors), [colors]);
+  const [isExpanded, setIsExpanded] = useState(false);
+  const [isDeleting, setIsDeleting] = useState(false);
+
+  const isCompact =
+    features === 'compact' ||
+    (typeof features === 'object' && features?.showContent === false);
+
+  const emit = (action: PostCardAction) => {
+    onAction(action);
+  };
+
+  const handleImagePress = (images: ImageGridItem[], imageIndex: number) => {
+    emit({ type: 'imagePress', payload: { images, imageIndex } });
+  };
+
+  const showGrid = variant === 'grid';
+  const author = post.author;
+  const rawContent = post.content ?? '';
+  const { isDesktop, isTablet, isWideScreen, isLandscape } = useResponsive();
+
+  const handleCardPress = () => emit({ type: 'press' });
+  const handleUserPress = () => emit({ type: 'userPress' });
+  const handleLike = () => emit({ type: post.is_liked ? 'unlike' : 'like' });
+  const handleComment = () => emit({ type: 'comment' });
+  const handleBookmark = () => emit({ type: post.is_favorited ? 'unbookmark' : 'bookmark' });
+  const handleShare = () => emit({ type: 'share' });
+  const handleDelete = () => {
+    if (isDeleting) return;
+    Alert.alert(
+      '删除帖子',
+      '确定要删除这篇帖子吗？删除后将无法恢复。',
+      [
+        { text: '取消', style: 'cancel' },
+        {
+          text: '删除',
+          style: 'destructive',
+          onPress: async () => {
+            setIsDeleting(true);
+            try {
+              emit({ type: 'delete' });
+            } finally {
+              setIsDeleting(false);
+            }
+          },
+        },
+      ],
+    );
+  };
+
+  const images: ImageGridItem[] = Array.isArray(post.images)
+    ? post.images.map((img) => ({
+        id: img.id,
+        url: img.url,
+        thumbnail_url: img.thumbnail_url,
+        preview_url: img.preview_url,
+        preview_url_large: img.preview_url_large,
+        width: img.width,
+        height: img.height,
+      }))
+    : [];
+
+  const formatNumber = (num: number): string => {
+    if (num >= 10000) return `${(num / 10000).toFixed(1)}w`;
+    if (num >= 1000) return `${(num / 1000).toFixed(1)}k`;
+    return String(num);
+  };
+
+  const getResponsiveMaxLength = () => {
+    if (isWideScreen) return 300;
+    if (isDesktop) return 250;
+    if (isTablet) return 200;
+    return 100;
+  };
+
+  const contentNumberOfLines = useMemo(() => {
+    if (isWideScreen) return 8;
+    if (isDesktop) return 6;
+    if (isTablet) return 5;
+    return 3;
+  }, [isWideScreen, isDesktop, isTablet]);
+
+  const getTruncatedContent = (value: string): string => {
+    const maxLength = getResponsiveMaxLength();
+    if (value.length <= maxLength || isExpanded) return value;
+    return `${value.substring(0, maxLength)}...`;
+  };
+
+  const shouldTruncate = !showGrid && !isCompact && rawContent.length > getResponsiveMaxLength();
+  const content = useMemo(
+    () => (showGrid || isCompact ? rawContent : getTruncatedContent(rawContent)),
+    [rawContent, showGrid, isCompact, isExpanded, isWideScreen, isDesktop, isTablet]
+  );
+
+  const renderImages = () => {
+    if (images.length === 0) return null;
+
+    if (showGrid) {
+      const cover = images[0];
+      const coverUrl = getPreviewImageUrl(cover as any, 'grid');
+      return (
+        <TouchableOpacity activeOpacity={0.9} onPress={() => handleImagePress(images, 0)}>
+          <SmartImage
+            source={{ uri: coverUrl || cover.url || '' }}
+            style={styles.gridCover}
+            resizeMode="cover"
+            usePreview={true}
+          />
+        </TouchableOpacity>
+      );
+    }
+
+    return (
+      <PostImages
+        images={post.images || []}
+        displayMode="list"
+        onImagePress={handleImagePress}
+      />
+    );
+  };
+
+  const renderTopComment = () => {
+    if (showGrid || !post.top_comment) return null;
+    return (
+      <TouchableOpacity style={styles.topCommentBox} activeOpacity={0.85} onPress={handleComment}>
+        <Text style={styles.topCommentAuthor} numberOfLines={1}>
+          {post.top_comment.author?.nickname || '匿名用户'}:
+        </Text>
+        <Text style={styles.topCommentText} numberOfLines={1}>
+          {post.top_comment.content}
+        </Text>
+      </TouchableOpacity>
+    );
+  };
+
+  const renderGridCard = () => {
+    const cover = images[0];
+    const hasImage = !!cover;
+    const coverUrl = hasImage ? getPreviewImageUrl(cover as any, 'grid') : '';
+    const contentPreview = rawContent
+      .replace(/[#*_~`\[\]()]/g, '')
+      .replace(/\n+/g, ' ')
+      .trim();
+
+    return (
+      <TouchableOpacity
+        activeOpacity={0.9}
+        onPress={handleCardPress}
+        style={[styles.gridRootCard, style]}
+      >
+        {hasImage ? (
+          <TouchableOpacity activeOpacity={0.9} onPress={() => handleImagePress(images, 0)}>
+            <SmartImage
+              source={{ uri: coverUrl || cover.url || '' }}
+              style={styles.gridCover}
+              resizeMode="cover"
+              usePreview={true}
+            />
+          </TouchableOpacity>
+        ) : (
+          <View style={styles.gridNoImagePreview}>
+            <Text style={styles.gridNoImageText} numberOfLines={6}>
+              {contentPreview}
+            </Text>
+          </View>
+        )}
+
+        {post.is_vote && (
+          <View style={styles.gridVoteTag}>
+            <MaterialCommunityIcons name="vote" size={11} color={colors.primary.contrast} />
+            <Text style={styles.gridVoteTagText}>投票</Text>
+          </View>
+        )}
+
+        {!!post.title && (
+          <Text style={styles.gridTitleMain} numberOfLines={hasImage ? 2 : 3}>
+            {post.title}
+          </Text>
+        )}
+
+        {!!post.channel?.name && (
+          <View style={styles.gridChannelRow}>
+            <MaterialCommunityIcons name="tag-outline" size={12} color={colors.text.hint} />
+            <Text style={styles.gridChannelText} numberOfLines={1}>
+              {post.channel.name}
+            </Text>
+          </View>
+        )}
+
+        <View style={styles.gridFooter}>
+          <TouchableOpacity onPress={handleUserPress} style={styles.gridUserArea}>
+            <Avatar source={author?.avatar} size={20} name={author?.nickname || '匿名用户'} />
+            <Text style={styles.gridUsername} numberOfLines={1}>{author?.nickname || '匿名用户'}</Text>
+          </TouchableOpacity>
+          <View style={styles.gridLikeArea}>
+            <MaterialCommunityIcons name="heart-outline" size={14} color={colors.text.secondary} />
+            <Text style={styles.gridLikeCount}>{formatNumber(post.likes_count || 0)}</Text>
+          </View>
+        </View>
+      </TouchableOpacity>
+    );
+  };
+
+  return (
+    showGrid ? renderGridCard() : (
+    <TouchableOpacity
+      activeOpacity={0.9}
+      onPress={handleCardPress}
+      style={[styles.card, style]}
+    >
+      <View style={styles.header}>
+        <TouchableOpacity onPress={handleUserPress} activeOpacity={0.8} style={styles.authorWrap}>
+          <Avatar source={author?.avatar} size={showGrid ? 22 : 36} name={author?.nickname || '匿名用户'} />
+          <View style={styles.authorMeta}>
+            <Text style={styles.authorName} numberOfLines={1}>{author?.nickname || '匿名用户'}</Text>
+            {!showGrid && (
+              <View style={styles.metaRow}>
+                <PostCardRelativeTime createdAt={post.created_at} style={styles.timeText} />
+                {post.is_pinned && (
+                  <View style={styles.pinnedTag}>
+                    <MaterialCommunityIcons name="pin" size={10} color={colors.warning.main} />
+                    <Text style={styles.pinnedText}>置顶</Text>
+                  </View>
+                )}
+                {isAuthor && <Text style={styles.badgeText}>楼主</Text>}
+              </View>
+            )}
+          </View>
+        </TouchableOpacity>
+        {isPostAuthor && (
+          <TouchableOpacity onPress={handleDelete} hitSlop={8} style={styles.deleteButton} disabled={isDeleting}>
+            <MaterialCommunityIcons
+              name={isDeleting ? 'loading' : 'delete-outline'}
+              size={isDesktop ? 20 : 18}
+              color={colors.text.hint}
+            />
+          </TouchableOpacity>
+        )}
+      </View>
+
+      {!!post.title && (
+        <Text style={styles.title} numberOfLines={isCompact ? 2 : undefined}>
+          {post.title}
+        </Text>
+      )}
+
+      {!isCompact && !!content && (
+        <>
+          <Text
+            style={styles.content}
+            numberOfLines={isExpanded ? undefined : contentNumberOfLines}
+          >
+            {content}
+          </Text>
+          {shouldTruncate && (
+            <TouchableOpacity onPress={() => setIsExpanded((prev) => !prev)} style={styles.expandBtn}>
+              <Text style={styles.expandText}>{isExpanded ? '收起' : '展开全文'}</Text>
+            </TouchableOpacity>
+          )}
+        </>
+      )}
+
+      {renderImages()}
+      {renderTopComment()}
+
+      <View style={styles.actions}>
+        <View style={styles.actionsLeading}>
+          <View style={styles.viewsWrap}>
+            <MaterialCommunityIcons name="eye-outline" size={16} color={colors.text.hint} />
+            <Text style={styles.viewsText}>{post.views_count || 0}</Text>
+          </View>
+          {!!post.channel?.name && (
+            <View style={[styles.channelTag, styles.channelTagAfterViews]}>
+              <MaterialCommunityIcons name="tag-outline" size={11} color={colors.primary.main} />
+              <Text style={styles.channelTagText} numberOfLines={1}>
+                {post.channel.name}
+              </Text>
+            </View>
+          )}
+        </View>
+        <View style={styles.actionButtons}>
+          <TouchableOpacity style={styles.actionBtn} onPress={handleLike}>
+            <MaterialCommunityIcons
+              name={post.is_liked ? 'heart' : 'heart-outline'}
+              size={18}
+              color={post.is_liked ? colors.error.main : colors.text.secondary}
+            />
+            <Text style={post.is_liked ? styles.activeActionTextMerged : styles.actionText}>
+              {post.likes_count > 0 ? formatNumber(post.likes_count) : '赞'}
+            </Text>
+          </TouchableOpacity>
+          <TouchableOpacity style={styles.actionBtn} onPress={handleComment}>
+            <MaterialCommunityIcons name="comment-outline" size={18} color={colors.text.secondary} />
+            <Text style={styles.actionText}>{post.comments_count > 0 ? formatNumber(post.comments_count) : '评论'}</Text>
+          </TouchableOpacity>
+          <TouchableOpacity style={styles.actionBtn} onPress={handleShare}>
+            <MaterialCommunityIcons name="share-outline" size={18} color={colors.text.secondary} />
+          </TouchableOpacity>
+          <TouchableOpacity style={styles.actionBtn} onPress={handleBookmark}>
+            <MaterialCommunityIcons
+              name={post.is_favorited ? 'bookmark' : 'bookmark-outline'}
+              size={18}
+              color={post.is_favorited ? colors.warning.main : colors.text.secondary}
+            />
+          </TouchableOpacity>
+        </View>
+      </View>
+    </TouchableOpacity>
+    )
+  );
+};
+
+PostCardInner.displayName = 'PostCard';
+
+const PostCard = memo(PostCardInner, arePostCardPropsEqual);
+
+export default PostCard;

src/components/business/PostCard/components/PostImages.tsx

@@ -0,0 +1,53 @@
+/**
+ * PostImages 子组件
+ * 显示帖子图片网格
+ */
+
+import React from 'react';
+import { View, StyleSheet } from 'react-native';
+import { spacing, borderRadius } from '../../../../theme';
+import { useResponsive } from '../../../../hooks/useResponsive';
+import { ImageGrid, ImageGridItem } from '../../../common';
+import { PostImagesProps } from '../types';
+
+const PostImages: React.FC<PostImagesProps> = ({ images, displayMode, onImagePress }) => {
+  const { isDesktop, isWideScreen } = useResponsive();
+
+  if (!images || images.length === 0) return null;
+
+  // 计算图片间距和圆角
+  const imageGap = isDesktop ? 4 : 2;
+  const imageBorderRadius = isDesktop ? borderRadius.xl : borderRadius.md;
+
+  return (
+    <View style={styles.container}>
+      <ImageGrid
+        images={images.map((img) => ({
+          id: img.id,
+          url: img.url,
+          thumbnail_url: img.thumbnail_url,
+          preview_url: img.preview_url,
+          preview_url_large: img.preview_url_large,
+          width: img.width,
+          height: img.height,
+        }))}
+        maxDisplayCount={isWideScreen ? 12 : 9}
+        mode="auto"
+        gap={imageGap}
+        borderRadius={imageBorderRadius}
+        showMoreOverlay={true}
+        onImagePress={onImagePress}
+        displayMode={displayMode}
+        usePreview={true}
+      />
+    </View>
+  );
+};
+
+const styles = StyleSheet.create({
+  container: {
+    marginBottom: spacing.md,
+  },
+});
+
+export default PostImages;

src/components/business/PostCard/components/index.ts

@@ -0,0 +1,5 @@
+/**
+ * PostCard 子组件导出（仅导出仓库内已存在的实现）
+ */
+
+export { default as PostImages } from './PostImages';

src/components/business/PostCard/hooks/index.ts

@@ -0,0 +1,5 @@
+/**
+ * PostCard Hooks（预留入口；实现文件尚未加入仓库时勿导出，避免 TS 无法解析）
+ */
+
+export {};

src/components/business/PostCard/index.ts

@@ -0,0 +1,30 @@
+/**
+ * PostCard 组件模块导出
+ */
+
+// 主组件（默认导出）
+export { default } from './PostCard';
+
+// 类型导出
+export type {
+  PostCardActionType,
+  PostCardActionPayload,
+  PostCardAction,
+  PostCardOnAction,
+  PostCardFeatures,
+  PostCardFeaturesPreset,
+  PostCardFeaturesConfig,
+  PostCardProps,
+  PostHeaderProps,
+  PostTitleProps,
+  PostContentProps,
+  PostImagesProps,
+  PostActionsProps,
+  PostVotePreviewProps,
+  PostTopCommentProps,
+  PostGridCoverProps,
+  PostGridInfoProps,
+  PostCardListProps,
+  PostCardGridProps,
+  Badge,
+} from './types';

src/components/business/PostCard/types.ts

@@ -0,0 +1,262 @@
+/**
+ * PostCard 组件类型定义
+ * 统一的帖子卡片组件类型系统
+ */
+
+import { StyleProp, ViewStyle } from 'react-native';
+import { Post, PostImageDTO, UserDTO, CommentDTO } from '../../../types';
+import { ImageGridItem } from '../../common';
+
+// ==================== Action 类型定义 ====================
+
+/**
+ * PostCard 支持的操作类型
+ */
+export type PostCardActionType =
+  | 'press' // 点击帖子主体
+  | 'userPress' // 点击用户头像/名称
+  | 'like' // 点赞
+  | 'unlike' // 取消点赞
+  | 'comment' // 评论
+  | 'bookmark' // 收藏
+  | 'unbookmark' // 取消收藏
+  | 'share' // 分享
+  | 'imagePress' // 点击图片
+  | 'delete'; // 删除
+
+/**
+ * Action payload 类型
+ */
+export interface PostCardActionPayload {
+  images?: ImageGridItem[];
+  imageIndex?: number;
+  [key: string]: unknown;
+}
+
+/**
+ * 统一的 Action 对象
+ */
+export interface PostCardAction {
+  type: PostCardActionType;
+  payload?: PostCardActionPayload;
+}
+
+/**
+ * 统一的回调函数类型
+ */
+export type PostCardOnAction = (action: PostCardAction) => void;
+
+// ==================== Features 配置类型 ====================
+
+/**
+ * 显示特性配置
+ */
+export interface PostCardFeatures {
+  /** 显示用户信息 */
+  showAuthor?: boolean;
+  /** 显示标题 */
+  showTitle?: boolean;
+  /** 显示内容 */
+  showContent?: boolean;
+  /** 显示图片 */
+  showImages?: boolean;
+  /** 显示投票预览 */
+  showVote?: boolean;
+  /** 显示热门评论 */
+  showTopComment?: boolean;
+  /** 显示操作栏 */
+  showActions?: boolean;
+  /** 显示浏览数 */
+  showViews?: boolean;
+  /** 显示分享按钮 */
+  showShare?: boolean;
+  /** 显示收藏按钮 */
+  showBookmark?: boolean;
+  /** 显示删除按钮（需配合权限判断） */
+  showDelete?: boolean;
+  /** 显示置顶标签 */
+  showPinned?: boolean;
+  /** 显示徽章（楼主/管理员） */
+  showBadges?: boolean;
+}
+
+/**
+ * Features 预设名称
+ */
+export type PostCardFeaturesPreset = 'full' | 'compact' | 'grid';
+
+/**
+ * Features 配置（可以是预设名称或自定义对象）
+ */
+export type PostCardFeaturesConfig = PostCardFeaturesPreset | PostCardFeatures;
+
+// ==================== 主组件 Props ====================
+
+/**
+ * PostCard 主组件 Props
+ */
+export interface PostCardProps {
+  /** 帖子数据 */
+  post: Post;
+
+  /** 统一事件回调 */
+  onAction: PostCardOnAction;
+
+  /** 显示模式：列表模式 | 网格模式 */
+  variant?: 'list' | 'grid';
+
+  /** 预设配置名称，或自定义配置对象 */
+  features?: PostCardFeaturesConfig;
+
+  /** 当前用户是否为帖子作者（用于显示删除按钮） */
+  isPostAuthor?: boolean;
+
+  /** 当前用户是否为楼主（在帖子详情页显示"楼主"徽章） */
+  isAuthor?: boolean;
+
+  /** 索引（用于虚拟化列表优化） */
+  index?: number;
+
+  /** 自定义样式 */
+  style?: StyleProp<ViewStyle>;
+}
+
+// ==================== 子组件 Props ====================
+
+/**
+ * PostHeader 子组件 Props
+ */
+export interface PostHeaderProps {
+  author: UserDTO;
+  createdAt: string;
+  editedAt?: string;
+  isPinned?: boolean;
+  badges?: Array<{ type: 'author' | 'admin'; label: string }>;
+  onDelete?: () => void;
+  onUserPress: () => void;
+  showDelete?: boolean;
+  showPinned?: boolean;
+  showBadges?: boolean;
+  isDeleting?: boolean;
+}
+
+/**
+ * PostTitle 子组件 Props
+ */
+export interface PostTitleProps {
+  title?: string;
+  numberOfLines?: number;
+}
+
+/**
+ * PostContent 子组件 Props
+ */
+export interface PostContentProps {
+  content?: string;
+  compact?: boolean;
+  maxLines?: number;
+  isExpanded?: boolean;
+  onToggleExpand?: () => void;
+}
+
+/**
+ * PostImages 子组件 Props
+ */
+export interface PostImagesProps {
+  images: PostImageDTO[];
+  displayMode: 'list' | 'grid';
+  onImagePress: (images: ImageGridItem[], index: number) => void;
+}
+
+/**
+ * PostActions 子组件 Props
+ */
+export interface PostActionsProps {
+  viewsCount: number;
+  likesCount: number;
+  commentsCount: number;
+  isLiked: boolean;
+  isFavorited: boolean;
+  onLike: () => void;
+  onComment: () => void;
+  onShare: () => void;
+  onBookmark: () => void;
+  showViews?: boolean;
+  showShare?: boolean;
+  showBookmark?: boolean;
+}
+
+/**
+ * PostVotePreview 子组件 Props
+ */
+export interface PostVotePreviewProps {
+  isVote: boolean;
+  totalVotes?: number;
+  optionsCount?: number;
+  onPress: () => void;
+}
+
+/**
+ * PostTopComment 子组件 Props
+ */
+export interface PostTopCommentProps {
+  comment: CommentDTO | null;
+  totalComments: number;
+  onPress: () => void;
+}
+
+/**
+ * PostGridCover 子组件 Props
+ */
+export interface PostGridCoverProps {
+  image: PostImageDTO | null;
+  content?: string;
+  isVote?: boolean;
+  aspectRatio: number;
+  onImagePress: () => void;
+}
+
+/**
+ * PostGridInfo 子组件 Props
+ */
+export interface PostGridInfoProps {
+  title?: string;
+  author: UserDTO;
+  likesCount: number;
+  onUserPress: () => void;
+}
+
+// ==================== 容器组件 Props ====================
+
+/**
+ * PostCardList 容器组件 Props
+ */
+export interface PostCardListProps {
+  post: Post;
+  onAction: PostCardOnAction;
+  features: PostCardFeatures;
+  isPostAuthor?: boolean;
+  isAuthor?: boolean;
+  index?: number;
+  style?: StyleProp<ViewStyle>;
+}
+
+/**
+ * PostCardGrid 容器组件 Props
+ */
+export interface PostCardGridProps {
+  post: Post;
+  onAction: PostCardOnAction;
+  features: PostCardFeatures;
+  style?: StyleProp<ViewStyle>;
+}
+
+// ==================== 工具类型 ====================
+
+/**
+ * 徽章类型
+ */
+export interface Badge {
+  type: 'author' | 'admin';
+  label: string;
+}

src/components/business/QRCodeScanner.tsx

@@ -0,0 +1,246 @@
+import React, { useEffect, useMemo, useState } from 'react';
+import {
+  View,
+  Text,
+  StyleSheet,
+  TouchableOpacity,
+  Alert,
+  Modal,
+  Dimensions,
+} from 'react-native';
+import { CameraView, useCameraPermissions } from 'expo-camera';
+import { useRouter } from 'expo-router';
+import { MaterialCommunityIcons } from '@expo/vector-icons';
+import * as hrefs from '../../navigation/hrefs';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
+
+const { width, height } = Dimensions.get('window');
+
+interface QRCodeScannerProps {
+  visible: boolean;
+  onClose: () => void;
+}
+
+function createQrScannerStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flex: 1,
+      backgroundColor: '#000',
+    },
+    camera: {
+      flex: 1,
+    },
+    overlay: {
+      flex: 1,
+      backgroundColor: 'rgba(0,0,0,0.5)',
+    },
+    header: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'space-between',
+      paddingHorizontal: spacing.md,
+      paddingTop: spacing.xl,
+      paddingBottom: spacing.md,
+    },
+    closeButton: {
+      padding: spacing.sm,
+    },
+    headerTitle: {
+      fontSize: fontSizes.lg,
+      fontWeight: '600',
+      color: '#fff',
+    },
+    placeholder: {
+      width: 40,
+    },
+    scanArea: {
+      flex: 1,
+      justifyContent: 'center',
+      alignItems: 'center',
+    },
+    scanFrame: {
+      width: width * 0.7,
+      height: width * 0.7,
+      position: 'relative',
+    },
+    corner: {
+      position: 'absolute',
+      width: 20,
+      height: 20,
+      borderColor: colors.primary.main,
+      borderWidth: 3,
+    },
+    topLeft: {
+      top: 0,
+      left: 0,
+      borderRightWidth: 0,
+      borderBottomWidth: 0,
+    },
+    topRight: {
+      top: 0,
+      right: 0,
+      borderLeftWidth: 0,
+      borderBottomWidth: 0,
+    },
+    bottomLeft: {
+      bottom: 0,
+      left: 0,
+      borderRightWidth: 0,
+      borderTopWidth: 0,
+    },
+    bottomRight: {
+      bottom: 0,
+      right: 0,
+      borderLeftWidth: 0,
+      borderTopWidth: 0,
+    },
+    scanText: {
+      marginTop: spacing.lg,
+      fontSize: fontSizes.md,
+      color: '#fff',
+      textAlign: 'center',
+    },
+    footer: {
+      padding: spacing.xl,
+      alignItems: 'center',
+    },
+    flashButton: {
+      padding: spacing.md,
+      backgroundColor: 'rgba(255,255,255,0.2)',
+      borderRadius: borderRadius.full,
+    },
+    permissionContainer: {
+      flex: 1,
+      justifyContent: 'center',
+      alignItems: 'center',
+      padding: spacing.xl,
+    },
+    permissionText: {
+      marginTop: spacing.lg,
+      fontSize: fontSizes.md,
+      color: 'rgba(255,255,255,0.72)',
+      textAlign: 'center',
+    },
+    permissionButton: {
+      marginTop: spacing.xl,
+      paddingVertical: spacing.md,
+      paddingHorizontal: spacing.xl,
+      backgroundColor: colors.primary.main,
+      borderRadius: borderRadius.md,
+    },
+    permissionButtonText: {
+      color: '#fff',
+      fontSize: fontSizes.md,
+      fontWeight: '600',
+    },
+  });
+}
+
+export const QRCodeScanner: React.FC<QRCodeScannerProps> = ({ visible, onClose }) => {
+  const router = useRouter();
+  const themeColors = useAppColors();
+  const styles = useMemo(() => createQrScannerStyles(themeColors), [themeColors]);
+  const [permission, requestPermission] = useCameraPermissions();
+  const [scanned, setScanned] = useState(false);
+
+  useEffect(() => {
+    if (visible) {
+      setScanned(false);
+      if (!permission?.granted) {
+        requestPermission();
+      }
+    }
+  }, [visible]);
+
+  const handleBarCodeScanned = ({ type, data }: { type: string; data: string }) => {
+    if (scanned) return;
+    setScanned(true);
+    onClose();
+
+    if (data.startsWith('carrotbbs://qrcode/login')) {
+      const sessionId = extractSessionId(data);
+      if (sessionId) {
+        router.push(hrefs.hrefQrLoginConfirm(sessionId));
+      } else {
+        Alert.alert('无效的二维码', '无法识别该二维码');
+      }
+    } else {
+      Alert.alert('无效的二维码', '请扫描网页端的登录二维码');
+    }
+  };
+
+  const extractSessionId = (url: string): string | null => {
+    try {
+      const sessionIdMatch = url.match(/session_id=([^&]+)/);
+      return sessionIdMatch ? sessionIdMatch[1] : null;
+    } catch {
+      return null;
+    }
+  };
+
+  if (!permission?.granted) {
+    return (
+      <Modal visible={visible} animationType="slide" onRequestClose={onClose}>
+        <View style={styles.container}>
+          <View style={styles.header}>
+            <TouchableOpacity onPress={onClose} style={styles.closeButton}>
+              <MaterialCommunityIcons name="close" size={24} color="#fff" />
+            </TouchableOpacity>
+            <Text style={styles.headerTitle}>扫码登录</Text>
+            <View style={styles.placeholder} />
+          </View>
+          <View style={styles.permissionContainer}>
+            <MaterialCommunityIcons name="camera-off" size={64} color="rgba(255,255,255,0.5)" />
+            <Text style={styles.permissionText}>需要相机权限才能扫码</Text>
+            <TouchableOpacity style={styles.permissionButton} onPress={requestPermission}>
+              <Text style={styles.permissionButtonText}>授予权限</Text>
+            </TouchableOpacity>
+          </View>
+        </View>
+      </Modal>
+    );
+  }
+
+  return (
+    <Modal visible={visible} animationType="slide" onRequestClose={onClose}>
+      <View style={styles.container}>
+        <CameraView
+          style={styles.camera}
+          facing="back"
+          onBarcodeScanned={scanned ? undefined : handleBarCodeScanned}
+          barcodeScannerSettings={{
+            barcodeTypes: ['qr'],
+          }}
+        >
+          <View style={styles.overlay}>
+            <View style={styles.header}>
+              <TouchableOpacity onPress={onClose} style={styles.closeButton}>
+                <MaterialCommunityIcons name="close" size={24} color="#fff" />
+              </TouchableOpacity>
+              <Text style={styles.headerTitle}>扫码登录</Text>
+              <View style={styles.placeholder} />
+            </View>
+
+            <View style={styles.scanArea}>
+              <View style={styles.scanFrame}>
+                <View style={[styles.corner, styles.topLeft]} />
+                <View style={[styles.corner, styles.topRight]} />
+                <View style={[styles.corner, styles.bottomLeft]} />
+                <View style={[styles.corner, styles.bottomRight]} />
+              </View>
+              <Text style={styles.scanText}>将二维码放入框内即可扫描</Text>
+            </View>
+
+            <View style={styles.footer}>
+              <TouchableOpacity style={styles.flashButton} onPress={() => {}}>
+                <MaterialCommunityIcons name="flashlight" size={24} color="#fff" />
+              </TouchableOpacity>
+            </View>
+          </View>
+        </CameraView>
+      </View>
+    </Modal>
+  );
+};
+
+export default QRCodeScanner;

src/components/business/SearchBar.tsx

@@ -3,10 +3,10 @@
  * 用于搜索内容
  */
 
-import React, { useState } from 'react';
+import React, { useMemo, useState } from 'react';
 import { View, TextInput, TouchableOpacity, StyleSheet } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, spacing, fontSizes, borderRadius } from '../../theme';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
 
 interface SearchBarProps {
   value: string;
@@ -18,6 +18,63 @@ interface SearchBarProps {
   autoFocus?: boolean;
 }
 
+function createSearchBarStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.full,
+      paddingHorizontal: spacing.xs,
+      height: 46,
+      borderWidth: 1,
+      borderColor: colors.divider,
+      shadowColor: 'transparent',
+      shadowOffset: { width: 0, height: 0 },
+      shadowOpacity: 0,
+      shadowRadius: 0,
+      elevation: 0,
+    },
+    containerFocused: {
+      borderColor: colors.primary.main,
+      shadowColor: 'transparent',
+      shadowOffset: { width: 0, height: 0 },
+      shadowOpacity: 0,
+      shadowRadius: 0,
+      elevation: 0,
+    },
+    searchIconWrap: {
+      width: 30,
+      height: 30,
+      marginLeft: spacing.xs,
+      marginRight: spacing.xs,
+      borderRadius: borderRadius.full,
+      backgroundColor: `${colors.text.secondary}12`,
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+    searchIconWrapFocused: {
+      backgroundColor: `${colors.primary.main}1A`,
+    },
+    input: {
+      flex: 1,
+      fontSize: fontSizes.md,
+      color: colors.text.primary,
+      paddingVertical: spacing.sm + 1,
+      paddingHorizontal: spacing.xs,
+    },
+    clearButton: {
+      width: 24,
+      height: 24,
+      marginHorizontal: spacing.xs,
+      borderRadius: borderRadius.full,
+      backgroundColor: `${colors.text.secondary}14`,
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+  });
+}
+
 const SearchBar: React.FC<SearchBarProps> = ({
   value,
   onChangeText,
@@ -27,6 +84,8 @@ const SearchBar: React.FC<SearchBarProps> = ({
   onBlur,
   autoFocus = false,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createSearchBarStyles(colors), [colors]);
   const [isFocused, setIsFocused] = useState(false);
 
   const handleFocus = () => {
@@ -59,7 +118,6 @@ const SearchBar: React.FC<SearchBarProps> = ({
         onFocus={handleFocus}
         onBlur={handleBlur}
         autoFocus={autoFocus}
-        // 确保光标可见
         cursorColor={colors.primary.main}
         selectionColor={`${colors.primary.main}40`}
       />
@@ -69,73 +127,11 @@ const SearchBar: React.FC<SearchBarProps> = ({
           style={styles.clearButton}
           activeOpacity={0.7}
         >
-          <MaterialCommunityIcons
-            name="close"
-            size={14}
-            color={colors.text.secondary}
-          />
+          <MaterialCommunityIcons name="close" size={14} color={colors.text.secondary} />
         </TouchableOpacity>
       )}
     </View>
   );
 };
 
-const styles = StyleSheet.create({
-  container: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.full,
-    paddingHorizontal: spacing.xs,
-    height: 46,
-    borderWidth: 1,
-    borderColor: '#E7E7E7',
-    // 减少常态阴影，避免看起来像"黑框"
-    shadowColor: 'transparent',
-    shadowOffset: { width: 0, height: 0 },
-    shadowOpacity: 0,
-    shadowRadius: 0,
-    elevation: 0,
-  },
-  containerFocused: {
-    // 焦点时使用更柔和的边框颜色
-    borderColor: colors.primary.main,
-    // 不添加额外的阴影，保持简洁
-    shadowColor: 'transparent',
-    shadowOffset: { width: 0, height: 0 },
-    shadowOpacity: 0,
-    shadowRadius: 0,
-    elevation: 0,
-  },
-  searchIconWrap: {
-    width: 30,
-    height: 30,
-    marginLeft: spacing.xs,
-    marginRight: spacing.xs,
-    borderRadius: borderRadius.full,
-    backgroundColor: `${colors.text.secondary}12`,
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  searchIconWrapFocused: {
-    backgroundColor: `${colors.primary.main}1A`,
-  },
-  input: {
-    flex: 1,
-    fontSize: fontSizes.md,
-    color: colors.text.primary,
-    paddingVertical: spacing.sm + 1,
-    paddingHorizontal: spacing.xs,
-  },
-  clearButton: {
-    width: 24,
-    height: 24,
-    marginHorizontal: spacing.xs,
-    borderRadius: borderRadius.full,
-    backgroundColor: `${colors.text.secondary}14`,
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-});
-
 export default SearchBar;

src/components/business/SystemMessageItem.tsx

@@ -1,15 +1,15 @@
 /**
- * SystemMessageItem 系统消息项组件
+ * SystemMessageItem 系统消息项组件 - 美化版
  * 根据系统消息类型显示不同图标和内容
- * 参考 QQ 10000 系统消息和微信服务通知样式
+ * 采用卡片式设计，符合胡萝卜BBS整体风格
  */
 
-import React from 'react';
+import React, { useMemo } from 'react';
 import { View, TouchableOpacity, StyleSheet } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { formatDistanceToNow } from 'date-fns';
 import { zhCN } from 'date-fns/locale';
-import { colors, spacing, borderRadius } from '../../theme';
+import { spacing, borderRadius, shadows, fontSizes, useAppColors, type AppColors } from '../../theme';
 import { SystemMessageResponse, SystemMessageType } from '../../types/dto';
 import Text from '../common/Text';
 import Avatar from '../common/Avatar';
@@ -17,15 +17,16 @@ import Avatar from '../common/Avatar';
 interface SystemMessageItemProps {
   message: SystemMessageResponse;
   onPress?: () => void;
-  onAvatarPress?: () => void;  // 头像点击回调
+  onAvatarPress?: () => void;
   onRequestAction?: (approve: boolean) => void;
   requestActionLoading?: boolean;
+  index?: number; // 用于交错动画
 }
 
-// 系统消息类型到图标和颜色的映射
 const getSystemMessageIcon = (
-  systemType: SystemMessageType
-): { icon: keyof typeof MaterialCommunityIcons.glyphMap; color: string; bgColor: string } => {
+  systemType: SystemMessageType,
+  colors: AppColors
+): { icon: keyof typeof MaterialCommunityIcons.glyphMap; color: string; bgColor: string; gradient: string[] } => {
   switch (systemType) {
     case 'like_post':
     case 'like_comment':
@@ -33,83 +34,243 @@ const getSystemMessageIcon = (
     case 'favorite_post':
       return {
         icon: 'heart',
-        color: colors.error.main,
-        bgColor: colors.error.light + '20',
+        color: '#FF4757',
+        bgColor: '#FFE4E6',
+        gradient: ['#FF4757', '#FF6B7A'],
       };
     case 'comment':
       return {
-        icon: 'comment',
-        color: colors.info.main,
-        bgColor: colors.info.light + '20',
+        icon: 'comment-text',
+        color: '#2196F3',
+        bgColor: '#E3F2FD',
+        gradient: ['#2196F3', '#64B5F6'],
       };
     case 'reply':
       return {
         icon: 'reply',
-        color: colors.success.main,
-        bgColor: colors.success.light + '20',
+        color: '#4CAF50',
+        bgColor: '#E8F5E9',
+        gradient: ['#4CAF50', '#81C784'],
       };
     case 'follow':
       return {
         icon: 'account-plus',
-        color: '#9C27B0', // 紫色
-        bgColor: '#9C27B020',
+        color: '#9C27B0',
+        bgColor: '#F3E5F5',
+        gradient: ['#9C27B0', '#BA68C8'],
       };
     case 'mention':
       return {
         icon: 'at',
-        color: colors.warning.main,
-        bgColor: colors.warning.light + '20',
+        color: '#FF9800',
+        bgColor: '#FFF3E0',
+        gradient: ['#FF9800', '#FFB74D'],
       };
     case 'system':
       return {
         icon: 'cog',
-        color: colors.text.secondary,
-        bgColor: colors.background.disabled,
+        color: '#607D8B',
+        bgColor: '#ECEFF1',
+        gradient: ['#607D8B', '#90A4AE'],
       };
     case 'announcement':
     case 'announce':
       return {
         icon: 'bullhorn',
         color: colors.primary.main,
-        bgColor: colors.primary.light + '20',
+        bgColor: colors.primary.light + '30',
+        gradient: [colors.primary.main, colors.primary.light],
       };
     case 'group_invite':
       return {
         icon: 'account-multiple-plus',
-        color: colors.primary.main,
-        bgColor: colors.primary.light + '20',
+        color: '#00BCD4',
+        bgColor: '#E0F7FA',
+        gradient: ['#00BCD4', '#4DD0E1'],
       };
     case 'group_join_apply':
       return {
         icon: 'account-clock',
-        color: colors.warning.main,
-        bgColor: colors.warning.light + '20',
+        color: '#FF9800',
+        bgColor: '#FFF3E0',
+        gradient: ['#FF9800', '#FFB74D'],
       };
     case 'group_join_approved':
       return {
         icon: 'check-circle',
-        color: colors.success.main,
-        bgColor: colors.success.light + '20',
+        color: '#4CAF50',
+        bgColor: '#E8F5E9',
+        gradient: ['#4CAF50', '#81C784'],
       };
     case 'group_join_rejected':
       return {
         icon: 'close-circle',
-        color: colors.error.main,
-        bgColor: colors.error.light + '20',
+        color: '#F44336',
+        bgColor: '#FFEBEE',
+        gradient: ['#F44336', '#E57373'],
       };
     default:
       return {
         icon: 'bell',
-        color: colors.text.secondary,
-        bgColor: colors.background.disabled,
+        color: '#757575',
+        bgColor: '#F5F5F5',
+        gradient: ['#757575', '#9E9E9E'],
       };
   }
 };
 
+function createSystemMessageStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flexDirection: 'row',
+      alignItems: 'flex-start',
+      padding: spacing.md,
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.lg,
+      marginHorizontal: spacing.md,
+      marginBottom: spacing.sm,
+      ...shadows.sm,
+    },
+    unreadContainer: {
+      backgroundColor: colors.primary.light + '08',
+      borderLeftWidth: 3,
+      borderLeftColor: colors.primary.main,
+    },
+    unreadIndicator: {
+      position: 'absolute',
+      left: 6,
+      top: '50%',
+      marginTop: -4,
+      width: 8,
+      height: 8,
+      borderRadius: borderRadius.full,
+      backgroundColor: colors.primary.main,
+    },
+    iconContainer: {
+      marginRight: spacing.md,
+    },
+    avatarWrapper: {
+      position: 'relative',
+    },
+    iconWrapper: {
+      width: 48,
+      height: 48,
+      borderRadius: borderRadius.lg,
+      justifyContent: 'center',
+      alignItems: 'center',
+    },
+    typeIconBadge: {
+      position: 'absolute',
+      bottom: -2,
+      right: -2,
+      width: 20,
+      height: 20,
+      borderRadius: borderRadius.full,
+      justifyContent: 'center',
+      alignItems: 'center',
+      borderWidth: 2,
+      borderColor: colors.background.paper,
+    },
+    content: {
+      flex: 1,
+      justifyContent: 'center',
+      minWidth: 0,
+    },
+    titleRow: {
+      flexDirection: 'row',
+      justifyContent: 'space-between',
+      alignItems: 'center',
+      marginBottom: spacing.xs,
+    },
+    titleLeft: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      flex: 1,
+      marginRight: spacing.sm,
+    },
+    title: {
+      fontWeight: '500',
+      fontSize: fontSizes.md,
+      color: colors.text.primary,
+    },
+    unreadTitle: {
+      fontWeight: '600',
+      color: colors.text.primary,
+    },
+    statusBadge: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      paddingHorizontal: spacing.xs,
+      paddingVertical: 2,
+      borderRadius: borderRadius.sm,
+      marginLeft: spacing.xs,
+    },
+    statusText: {
+      fontSize: 10,
+      fontWeight: '500',
+      marginLeft: 2,
+    },
+    time: {
+      fontSize: fontSizes.sm,
+      flexShrink: 0,
+    },
+    messageContent: {
+      lineHeight: 20,
+      fontSize: fontSizes.sm,
+    },
+    extraInfo: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginTop: spacing.xs,
+      backgroundColor: colors.primary.light + '12',
+      paddingHorizontal: spacing.sm,
+      paddingVertical: spacing.xs,
+      borderRadius: borderRadius.md,
+      alignSelf: 'flex-start',
+    },
+    extraText: {
+      marginLeft: spacing.xs,
+      flex: 1,
+      fontWeight: '500',
+    },
+    actionsRow: {
+      flexDirection: 'row',
+      marginTop: spacing.sm,
+      gap: spacing.sm,
+    },
+    actionBtn: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      paddingVertical: spacing.xs,
+      paddingHorizontal: spacing.md,
+      borderRadius: borderRadius.md,
+      borderWidth: 1,
+      gap: spacing.xs,
+    },
+    rejectBtn: {
+      borderColor: `${colors.error.main}55`,
+      backgroundColor: `${colors.error.main}18`,
+    },
+    approveBtn: {
+      borderColor: `${colors.success.main}55`,
+      backgroundColor: `${colors.success.main}18`,
+    },
+    actionBtnText: {
+      fontWeight: '500',
+    },
+    arrowContainer: {
+      marginLeft: spacing.sm,
+      justifyContent: 'center',
+      alignItems: 'center',
+      height: 20,
+      width: 20,
+    },
+  });
+}
+
 // 获取系统消息标题
 const getSystemMessageTitle = (message: SystemMessageResponse): string => {
   const { system_type, extra_data } = message;
-  // 兼容后端返回的 actor_name 和 operator_name
   const operatorName = extra_data?.actor_name || extra_data?.operator_name;
   const groupName = extra_data?.group_name || extra_data?.target_title;
 
@@ -163,7 +324,11 @@ const SystemMessageItem: React.FC<SystemMessageItemProps> = ({
   onAvatarPress,
   onRequestAction,
   requestActionLoading = false,
+  index = 0,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createSystemMessageStyles(colors), [colors]);
+
   // 格式化时间
   const formatTime = (dateString: string): string => {
     try {
@@ -176,10 +341,9 @@ const SystemMessageItem: React.FC<SystemMessageItemProps> = ({
     }
   };
 
-  const { icon, color, bgColor } = getSystemMessageIcon(message.system_type);
+  const { icon, color, bgColor } = getSystemMessageIcon(message.system_type, colors);
   const title = getSystemMessageTitle(message);
   const { extra_data } = message;
-  // 兼容后端返回的 actor_name 和 operator_name
   const operatorName = extra_data?.actor_name || extra_data?.operator_name;
   const operatorAvatar = extra_data?.avatar_url || extra_data?.operator_avatar;
   const groupAvatar = extra_data?.group_avatar;
@@ -188,99 +352,7 @@ const SystemMessageItem: React.FC<SystemMessageItemProps> = ({
     (message.system_type === 'group_invite' || message.system_type === 'group_join_apply') &&
     requestStatus === 'pending' &&
     !!onRequestAction;
-
-  // 使用固定的响应式值，兼容移动端和Web端
-  const containerPadding = spacing.md;
-  const avatarSize = 44;
-  const iconSize = 22;
-  const contentFontSize = 14;
-  const titleFontSize = 14;
-  const timeFontSize = 12;
-
-  const styles = StyleSheet.create({
-    container: {
-      flexDirection: 'row',
-      alignItems: 'flex-start',
-      padding: containerPadding,
-      backgroundColor: colors.background.paper,
-      borderBottomWidth: 1,
-      borderBottomColor: colors.divider,
-    },
-    iconContainer: {
-      marginRight: spacing.md,
-    },
-    iconWrapper: {
-      width: avatarSize,
-      height: avatarSize,
-      borderRadius: avatarSize / 2,
-      justifyContent: 'center',
-      alignItems: 'center',
-    },
-    content: {
-      flex: 1,
-      justifyContent: 'center',
-      minWidth: 0,
-    },
-    titleRow: {
-      flexDirection: 'row',
-      justifyContent: 'space-between',
-      alignItems: 'center',
-      marginBottom: spacing.xs,
-    },
-    title: {
-      fontWeight: '600',
-      flex: 1,
-      marginRight: spacing.sm,
-      fontSize: titleFontSize,
-    },
-    time: {
-      fontSize: timeFontSize,
-    },
-    messageContent: {
-      lineHeight: 20,
-      fontSize: contentFontSize,
-    },
-    extraInfo: {
-      flexDirection: 'row',
-      alignItems: 'center',
-      marginTop: spacing.xs,
-      backgroundColor: colors.background.default,
-      paddingHorizontal: spacing.sm,
-      paddingVertical: spacing.xs,
-      borderRadius: borderRadius.sm,
-      alignSelf: 'flex-start',
-    },
-    extraText: {
-      marginLeft: spacing.xs,
-      flex: 1,
-    },
-    actionsRow: {
-      flexDirection: 'row',
-      marginTop: spacing.sm,
-    },
-    actionBtn: {
-      paddingVertical: spacing.xs,
-      paddingHorizontal: spacing.md,
-      borderRadius: borderRadius.sm,
-      borderWidth: 1,
-      marginRight: spacing.sm,
-    },
-    rejectBtn: {
-      borderColor: colors.error.light,
-      backgroundColor: colors.error.light + '18',
-    },
-    approveBtn: {
-      borderColor: colors.success.light,
-      backgroundColor: colors.success.light + '18',
-    },
-    arrowContainer: {
-      marginLeft: spacing.sm,
-      justifyContent: 'center',
-      alignItems: 'center',
-      height: 20,
-      width: 24,
-    },
-  });
+  const isUnread = message.is_read !== true;
 
   // 判断是否显示操作者头像
   const showOperatorAvatar = ['follow', 'like_post', 'like_comment', 'like_reply', 'favorite_post', 'comment', 'reply', 'mention', 'group_join_apply'].includes(
@@ -288,31 +360,68 @@ const SystemMessageItem: React.FC<SystemMessageItemProps> = ({
   );
   const showGroupAvatar = message.system_type === 'group_invite';
 
+  // 获取状态标签
+  const getStatusBadge = () => {
+    if (requestStatus === 'accepted') {
+      return (
+        <View style={[styles.statusBadge, { backgroundColor: `${colors.success.main}22` }]}>
+          <MaterialCommunityIcons name="check" size={10} color={colors.success.main} />
+          <Text variant="caption" color={colors.success.main} style={styles.statusText}>已同意</Text>
+        </View>
+      );
+    }
+    if (requestStatus === 'rejected') {
+      return (
+        <View style={[styles.statusBadge, { backgroundColor: `${colors.error.main}22` }]}>
+          <MaterialCommunityIcons name="close" size={10} color={colors.error.main} />
+          <Text variant="caption" color={colors.error.main} style={styles.statusText}>已拒绝</Text>
+        </View>
+      );
+    }
+    return null;
+  };
+
   return (
     <TouchableOpacity
-      style={styles.container}
+      style={[
+        styles.container,
+        isUnread && styles.unreadContainer,
+      ]}
       onPress={onPress}
-      activeOpacity={onPress ? 0.7 : 1}
+      activeOpacity={onPress ? 0.85 : 1}
       disabled={!onPress}
     >
+      {/* 左侧未读指示器 */}
+      {isUnread && <View style={styles.unreadIndicator} />}
+
       {/* 图标/头像区域 */}
       <View style={styles.iconContainer}>
         {showGroupAvatar ? (
-          <Avatar
-            source={groupAvatar || ''}
-            size={avatarSize}
-            name={extra_data?.group_name || '群聊'}
-          />
+          <View style={styles.avatarWrapper}>
+            <Avatar
+              source={groupAvatar || ''}
+              size={48}
+              name={extra_data?.group_name || '群聊'}
+            />
+            <View style={[styles.typeIconBadge, { backgroundColor: bgColor }]}>
+              <MaterialCommunityIcons name={icon} size={12} color={color} />
+            </View>
+          </View>
         ) : showOperatorAvatar ? (
-          <Avatar
-            source={operatorAvatar || ''}
-            size={avatarSize}
-            name={operatorName}
-            onPress={onAvatarPress}
-          />
+          <View style={styles.avatarWrapper}>
+            <Avatar
+              source={operatorAvatar || ''}
+              size={48}
+              name={operatorName}
+              onPress={onAvatarPress}
+            />
+            <View style={[styles.typeIconBadge, { backgroundColor: bgColor }]}>
+              <MaterialCommunityIcons name={icon} size={12} color={color} />
+            </View>
+          </View>
         ) : (
           <View style={[styles.iconWrapper, { backgroundColor: bgColor }]}>
-            <MaterialCommunityIcons name={icon} size={iconSize} color={color} />
+            <MaterialCommunityIcons name={icon} size={24} color={color} />
           </View>
         )}
       </View>
@@ -321,36 +430,49 @@ const SystemMessageItem: React.FC<SystemMessageItemProps> = ({
       <View style={styles.content}>
         {/* 标题行 */}
         <View style={styles.titleRow}>
-          <Text variant="body" style={styles.title} numberOfLines={1}>
-            {title}
-          </Text>
-          <Text variant="caption" color={colors.text.secondary} style={styles.time}>
+          <View style={styles.titleLeft}>
+            <Text
+              variant="body"
+              style={[styles.title, ...(isUnread ? [styles.unreadTitle] : [])]}
+              numberOfLines={1}
+            >
+              {title}
+            </Text>
+            {getStatusBadge()}
+          </View>
+          <Text variant="caption" color={colors.text.hint} style={styles.time}>
             {formatTime(message.created_at)}
           </Text>
         </View>
 
         {/* 消息内容 */}
-        <Text variant="caption" color={colors.text.secondary} numberOfLines={2} style={styles.messageContent}>
+        <Text 
+          variant="caption" 
+          color={colors.text.secondary} 
+          numberOfLines={2} 
+          style={styles.messageContent}
+        >
           {message.content}
         </Text>
 
-        {/* 附加信息 - 优先显示 target_title，图标根据 target_type 区分 */}
+        {/* 附加信息 */}
         {(extra_data?.target_title || extra_data?.post_title || extra_data?.comment_preview) &&
           !['group_invite', 'group_join_apply', 'group_join_approved', 'group_join_rejected'].includes(message.system_type) &&
           (() => {
-          const isCommentType = ['comment', 'reply'].includes(extra_data?.target_type ?? '');
-          const previewText = extra_data?.target_title || extra_data?.post_title || extra_data?.comment_preview;
-          const iconName = isCommentType ? 'comment-outline' : 'file-document-outline';
-          return (
-            <View style={styles.extraInfo}>
-              <MaterialCommunityIcons name={iconName} size={12} color={colors.text.hint} />
-              <Text variant="caption" color={colors.text.hint} numberOfLines={1} style={styles.extraText}>
-                {previewText}
-              </Text>
-            </View>
-          );
-        })()}
+            const isCommentType = ['comment', 'reply'].includes(extra_data?.target_type ?? '');
+            const previewText = extra_data?.target_title || extra_data?.post_title || extra_data?.comment_preview;
+            const iconName = isCommentType ? 'comment-text-outline' : 'file-document-outline';
+            return (
+              <View style={styles.extraInfo}>
+                <MaterialCommunityIcons name={iconName} size={12} color={colors.primary.main} />
+                <Text variant="caption" color={colors.primary.main} numberOfLines={1} style={styles.extraText}>
+                  {previewText}
+                </Text>
+              </View>
+            );
+          })()}
 
+        {/* 操作按钮 */}
         {isActionable && (
           <View style={styles.actionsRow}>
             <TouchableOpacity
@@ -358,20 +480,22 @@ const SystemMessageItem: React.FC<SystemMessageItemProps> = ({
               onPress={() => onRequestAction?.(false)}
               disabled={requestActionLoading}
             >
-              <Text variant="caption" color={colors.error.main}>拒绝</Text>
+              <MaterialCommunityIcons name="close" size={14} color={colors.error.main} />
+              <Text variant="caption" color={colors.error.main} style={styles.actionBtnText}>拒绝</Text>
             </TouchableOpacity>
             <TouchableOpacity
               style={[styles.actionBtn, styles.approveBtn]}
               onPress={() => onRequestAction?.(true)}
               disabled={requestActionLoading}
             >
-              <Text variant="caption" color={colors.success.main}>同意</Text>
+              <MaterialCommunityIcons name="check" size={14} color={colors.success.main} />
+              <Text variant="caption" color={colors.success.main} style={styles.actionBtnText}>同意</Text>
             </TouchableOpacity>
           </View>
         )}
       </View>
 
-      {/* 右侧箭头（如果有跳转） */}
+      {/* 右侧箭头 */}
       {onPress && (
         <View style={styles.arrowContainer}>
           <MaterialCommunityIcons name="chevron-right" size={20} color={colors.text.hint} />

src/components/business/TabBar.tsx

@@ -4,10 +4,10 @@
  * 新增胶囊式、分段式等现代设计风格
  */
 
-import React, { ReactNode } from 'react';
-import { View, TouchableOpacity, StyleSheet, ScrollView, Animated } from 'react-native';
+import React, { ReactNode, useMemo } from 'react';
+import { View, TouchableOpacity, StyleSheet, ScrollView, ViewStyle, StyleProp } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, spacing, fontSizes, borderRadius } from '../../theme';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
 import Text from '../common/Text';
 
 type TabBarVariant = 'default' | 'pill' | 'segmented' | 'modern';
@@ -20,6 +20,166 @@ interface TabBarProps {
   rightContent?: ReactNode;
   variant?: TabBarVariant;
   icons?: string[];
+  style?: StyleProp<ViewStyle>;
+}
+
+function createTabBarStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flexDirection: 'row',
+      backgroundColor: colors.background.paper,
+      borderBottomWidth: 1,
+      borderBottomColor: colors.divider,
+      alignItems: 'center',
+      paddingRight: spacing.xs,
+    },
+    scrollableContainer: {
+      flexDirection: 'row',
+      paddingHorizontal: spacing.md,
+      backgroundColor: colors.background.paper,
+      borderBottomWidth: 1,
+      borderBottomColor: colors.divider,
+      flex: 1,
+    },
+    tab: {
+      flex: 1,
+      alignItems: 'center',
+      justifyContent: 'center',
+      paddingVertical: spacing.md,
+      position: 'relative',
+    },
+    activeTab: {},
+    tabText: {
+      fontWeight: '500',
+    },
+    activeTabText: {
+      fontWeight: '600',
+    },
+    activeIndicator: {
+      position: 'absolute',
+      bottom: 0,
+      left: '25%',
+      right: '25%',
+      height: 3,
+      backgroundColor: colors.primary.main,
+      borderTopLeftRadius: borderRadius.sm,
+      borderTopRightRadius: borderRadius.sm,
+    },
+    rightContent: {
+      paddingLeft: spacing.sm,
+    },
+    pillContainer: {
+      flexDirection: 'row',
+      backgroundColor: colors.background.default,
+      padding: spacing.sm,
+      gap: spacing.sm,
+    },
+    pillTab: {
+      flex: 1,
+      alignItems: 'center',
+      justifyContent: 'center',
+      paddingVertical: spacing.sm,
+      paddingHorizontal: spacing.md,
+      borderRadius: borderRadius.lg,
+      backgroundColor: colors.background.paper,
+    },
+    pillTabActive: {
+      backgroundColor: colors.primary.main,
+    },
+    pillTabText: {
+      fontWeight: '600',
+    },
+    segmentedContainer: {
+      flexDirection: 'row',
+      backgroundColor: colors.background.default,
+      padding: spacing.xs,
+      marginHorizontal: spacing.md,
+      marginVertical: spacing.sm,
+      borderRadius: borderRadius.lg,
+    },
+    segmentedTab: {
+      flex: 1,
+      alignItems: 'center',
+      justifyContent: 'center',
+      paddingVertical: spacing.sm,
+      backgroundColor: 'transparent',
+    },
+    segmentedTabActive: {
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.md,
+      shadowColor: colors.chat.shadow,
+      shadowOffset: { width: 0, height: 1 },
+      shadowOpacity: 0.1,
+      shadowRadius: 2,
+      elevation: 2,
+    },
+    segmentedTabFirst: {
+      borderTopLeftRadius: borderRadius.md,
+      borderBottomLeftRadius: borderRadius.md,
+    },
+    segmentedTabLast: {
+      borderTopRightRadius: borderRadius.md,
+      borderBottomRightRadius: borderRadius.md,
+    },
+    segmentedTabText: {
+      fontWeight: '600',
+    },
+    segmentedTabContent: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+    segmentedTabIcon: {
+      marginRight: spacing.xs,
+    },
+    modernContainer: {
+      flexDirection: 'row',
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.xl,
+      marginHorizontal: spacing.lg,
+      marginVertical: spacing.md,
+      padding: spacing.xs,
+      shadowColor: colors.chat.shadow,
+      shadowOffset: { width: 0, height: 2 },
+      shadowOpacity: 0.08,
+      shadowRadius: 8,
+      elevation: 3,
+    },
+    modernTab: {
+      flex: 1,
+      alignItems: 'center',
+      justifyContent: 'center',
+      paddingVertical: spacing.sm,
+      borderRadius: borderRadius.lg,
+      position: 'relative',
+    },
+    modernTabActive: {
+      backgroundColor: colors.primary.main + '15',
+    },
+    modernTabContent: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+    modernTabIcon: {
+      marginRight: spacing.xs,
+    },
+    modernTabText: {
+      fontWeight: '500',
+      fontSize: fontSizes.md,
+    },
+    modernTabTextActive: {
+      fontWeight: '700',
+    },
+    modernTabIndicator: {
+      position: 'absolute',
+      bottom: 4,
+      width: 20,
+      height: 3,
+      backgroundColor: colors.primary.main,
+      borderRadius: borderRadius.full,
+    },
+  });
 }
 
 const TabBar: React.FC<TabBarProps> = ({
@@ -30,7 +190,11 @@ const TabBar: React.FC<TabBarProps> = ({
   rightContent,
   variant = 'default',
   icons,
+  style,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createTabBarStyles(colors), [colors]);
+
   const renderTabs = () => {
     return tabs.map((tab, index) => {
       const isActive = index === activeIndex;
@@ -109,11 +273,7 @@ const TabBar: React.FC<TabBarProps> = ({
                   style={styles.segmentedTabIcon}
                 />
               )}
-              <Text
-                variant="body"
-                color={isActive ? colors.primary.main : colors.text.secondary}
-                style={styles.segmentedTabText}
-              >
+              <Text variant="body" color={isActive ? colors.primary.main : colors.text.secondary} style={styles.segmentedTabText}>
                 {tab}
               </Text>
             </View>
@@ -121,7 +281,6 @@ const TabBar: React.FC<TabBarProps> = ({
         );
       }
 
-      // default variant
       return (
         <TouchableOpacity
           key={index}
@@ -157,12 +316,8 @@ const TabBar: React.FC<TabBarProps> = ({
 
   if (scrollable) {
     return (
-      <View style={getContainerStyle()}>
-        <ScrollView
-          horizontal
-          showsHorizontalScrollIndicator={false}
-          contentContainerStyle={styles.scrollableContainer}
-        >
+      <View style={[getContainerStyle(), style]}>
+        <ScrollView horizontal showsHorizontalScrollIndicator={false} contentContainerStyle={styles.scrollableContainer}>
           {renderTabs()}
         </ScrollView>
         {rightContent && <View style={styles.rightContent}>{rightContent}</View>}
@@ -171,177 +326,11 @@ const TabBar: React.FC<TabBarProps> = ({
   }
 
   return (
-    <View style={getContainerStyle()}>
+    <View style={[getContainerStyle(), style]}>
       {renderTabs()}
       {rightContent && <View style={styles.rightContent}>{rightContent}</View>}
     </View>
   );
 };
 
-const styles = StyleSheet.create({
-  // Default variant
-  container: {
-    flexDirection: 'row',
-    backgroundColor: colors.background.paper,
-    borderBottomWidth: 1,
-    borderBottomColor: colors.divider,
-    alignItems: 'center',
-    paddingRight: spacing.xs,
-  },
-  scrollableContainer: {
-    flexDirection: 'row',
-    paddingHorizontal: spacing.md,
-    backgroundColor: colors.background.paper,
-    borderBottomWidth: 1,
-    borderBottomColor: colors.divider,
-    flex: 1,
-  },
-  tab: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    paddingVertical: spacing.md,
-    position: 'relative',
-  },
-  activeTab: {
-    // 激活状态样式
-  },
-  tabText: {
-    fontWeight: '500',
-  },
-  activeTabText: {
-    fontWeight: '600',
-  },
-  activeIndicator: {
-    position: 'absolute',
-    bottom: 0,
-    left: '25%',
-    right: '25%',
-    height: 3,
-    backgroundColor: colors.primary.main,
-    borderTopLeftRadius: borderRadius.sm,
-    borderTopRightRadius: borderRadius.sm,
-  },
-  rightContent: {
-    paddingLeft: spacing.sm,
-  },
-  
-  // Pill variant
-  pillContainer: {
-    flexDirection: 'row',
-    backgroundColor: colors.background.default,
-    padding: spacing.sm,
-    gap: spacing.sm,
-  },
-  pillTab: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    paddingVertical: spacing.sm,
-    paddingHorizontal: spacing.md,
-    borderRadius: borderRadius.lg,
-    backgroundColor: colors.background.paper,
-  },
-  pillTabActive: {
-    backgroundColor: colors.primary.main,
-  },
-  pillTabText: {
-    fontWeight: '600',
-  },
-  
-  // Segmented variant
-  segmentedContainer: {
-    flexDirection: 'row',
-    backgroundColor: colors.background.default,
-    padding: spacing.xs,
-    marginHorizontal: spacing.md,
-    marginVertical: spacing.sm,
-    borderRadius: borderRadius.lg,
-  },
-  segmentedTab: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    paddingVertical: spacing.sm,
-    backgroundColor: 'transparent',
-  },
-  segmentedTabActive: {
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.md,
-    shadowColor: '#000',
-    shadowOffset: { width: 0, height: 1 },
-    shadowOpacity: 0.1,
-    shadowRadius: 2,
-    elevation: 2,
-  },
-  segmentedTabFirst: {
-    borderTopLeftRadius: borderRadius.md,
-    borderBottomLeftRadius: borderRadius.md,
-  },
-  segmentedTabLast: {
-    borderTopRightRadius: borderRadius.md,
-    borderBottomRightRadius: borderRadius.md,
-  },
-  segmentedTabText: {
-    fontWeight: '600',
-  },
-  segmentedTabContent: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  segmentedTabIcon: {
-    marginRight: spacing.xs,
-  },
-
-  // Modern variant - 现代化标签栏
-  modernContainer: {
-    flexDirection: 'row',
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.xl,
-    marginHorizontal: spacing.lg,
-    marginVertical: spacing.md,
-    padding: spacing.xs,
-    shadowColor: '#000',
-    shadowOffset: { width: 0, height: 2 },
-    shadowOpacity: 0.08,
-    shadowRadius: 8,
-    elevation: 3,
-  },
-  modernTab: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    paddingVertical: spacing.sm,
-    borderRadius: borderRadius.lg,
-    position: 'relative',
-  },
-  modernTabActive: {
-    backgroundColor: colors.primary.main + '15', // 10% opacity
-  },
-  modernTabContent: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  modernTabIcon: {
-    marginRight: spacing.xs,
-  },
-  modernTabText: {
-    fontWeight: '500',
-    fontSize: fontSizes.md,
-  },
-  modernTabTextActive: {
-    fontWeight: '700',
-  },
-  modernTabIndicator: {
-    position: 'absolute',
-    bottom: 4,
-    width: 20,
-    height: 3,
-    backgroundColor: colors.primary.main,
-    borderRadius: borderRadius.full,
-  },
-});
-
 export default TabBar;

src/components/business/UserProfileHeader.tsx

@@ -6,7 +6,7 @@
  * 在宽屏下显示更大的头像和封面
  */
 
-import React from 'react';
+import React, { useMemo } from 'react';
 import {
   View,
   Image,
@@ -15,7 +15,7 @@ import {
 } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { LinearGradient } from 'expo-linear-gradient';
-import { colors, spacing, fontSizes, borderRadius, shadows } from '../../theme';
+import { spacing, fontSizes, borderRadius, shadows, useAppColors, type AppColors } from '../../theme';
 import { User } from '../../types';
 import Text from '../common/Text';
 import Button from '../common/Button';
@@ -49,7 +49,8 @@ const UserProfileHeader: React.FC<UserProfileHeaderProps> = ({
   onFollowersPress,
   onAvatarPress,
 }) => {
-  // 响应式布局
+  const colors = useAppColors();
+  const styles = useMemo(() => createUserProfileHeaderStyles(colors), [colors]);
   const { isWideScreen, isDesktop, width } = useResponsive();
 
   // 格式化数字
@@ -236,22 +237,22 @@ const UserProfileHeader: React.FC<UserProfileHeaderProps> = ({
 
         {/* 个人信息标签 */}
         <View style={styles.metaInfo}>
-          {user.location && (
+          {user.location?.trim() ? (
             <View style={styles.metaTag}>
               <MaterialCommunityIcons name="map-marker-outline" size={12} color={colors.primary.main} />
               <Text variant="caption" color={colors.primary.main} style={styles.metaTagText}>
                 {user.location}
               </Text>
             </View>
-          )}
-          {user.website && (
+          ) : null}
+          {user.website?.trim() ? (
             <View style={styles.metaTag}>
               <MaterialCommunityIcons name="link-variant" size={12} color={colors.info.main} />
               <Text variant="caption" color={colors.info.main} style={styles.metaTagText}>
                 {user.website.replace(/^https?:\/\//, '')}
               </Text>
             </View>
-          )}
+          ) : null}
           <View style={styles.metaTag}>
             <MaterialCommunityIcons name="calendar-outline" size={12} color={colors.text.secondary} />
             <Text variant="caption" color={colors.text.secondary} style={styles.metaTagText}>
@@ -317,7 +318,8 @@ const UserProfileHeader: React.FC<UserProfileHeaderProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
+function createUserProfileHeaderStyles(colors: AppColors) {
+  return StyleSheet.create({
   container: {
     backgroundColor: colors.background.default,
   },
@@ -533,7 +535,8 @@ const styles = StyleSheet.create({
     alignSelf: 'center',
     padding: spacing.sm,
   },
-});
+  });
+}
 
 // 使用 React.memo 避免不必要的重新渲染
 const MemoizedUserProfileHeader = React.memo(UserProfileHeader);

src/components/business/VoteCard.tsx

@@ -4,7 +4,7 @@
  * 风格与现代整体UI保持一致
  */
 
-import React, { useCallback } from 'react';
+import React, { useCallback, useMemo } from 'react';
 import {
   View,
   TouchableOpacity,
@@ -12,7 +12,7 @@ import {
   Animated,
 } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, spacing, fontSizes, borderRadius } from '../../theme';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
 import { VoteOptionDTO } from '../../types';
 import Text from '../common/Text';
 
@@ -28,6 +28,146 @@ interface VoteCardProps {
   compact?: boolean;
 }
 
+function createVoteCardStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.lg,
+      padding: spacing.md,
+      marginVertical: spacing.sm,
+      borderWidth: 1,
+      borderColor: colors.divider,
+    },
+    containerCompact: {
+      padding: spacing.sm,
+      marginVertical: spacing.xs,
+    },
+    header: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginBottom: spacing.sm,
+    },
+    headerIcon: {
+      width: 24,
+      height: 24,
+      borderRadius: borderRadius.sm,
+      backgroundColor: colors.primary.light + '20',
+      justifyContent: 'center',
+      alignItems: 'center',
+      marginRight: spacing.sm,
+    },
+    headerTitle: {
+      fontWeight: '600',
+      color: colors.text.primary,
+    },
+    optionsList: {
+      gap: spacing.sm,
+    },
+    optionContainer: {
+      position: 'relative',
+      borderRadius: borderRadius.md,
+      overflow: 'hidden',
+    },
+    progressBar: {
+      position: 'absolute',
+      top: 0,
+      left: 0,
+      bottom: 0,
+      borderRadius: borderRadius.md,
+    },
+    optionButton: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      paddingVertical: spacing.sm,
+      paddingHorizontal: spacing.md,
+      borderRadius: borderRadius.md,
+      backgroundColor: colors.background.default,
+      minHeight: 44,
+      borderWidth: 1,
+      borderColor: 'transparent',
+    },
+    optionButtonVoted: {
+      borderColor: colors.primary.main,
+      backgroundColor: 'transparent',
+    },
+    optionIndicator: {
+      width: 18,
+      height: 18,
+      borderRadius: borderRadius.full,
+      borderWidth: 2,
+      borderColor: colors.divider,
+      marginRight: spacing.sm,
+      justifyContent: 'center',
+      alignItems: 'center',
+    },
+    optionIndicatorVoted: {
+      backgroundColor: colors.primary.main,
+      borderColor: colors.primary.main,
+    },
+    optionText: {
+      flex: 1,
+      fontSize: fontSizes.md,
+      color: colors.text.primary,
+      lineHeight: 20,
+    },
+    optionTextCompact: {
+      fontSize: fontSizes.sm,
+      lineHeight: 18,
+    },
+    resultContainer: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      marginLeft: spacing.sm,
+      minWidth: 40,
+      justifyContent: 'flex-end',
+    },
+    percentage: {
+      color: colors.text.secondary,
+      fontWeight: '500',
+    },
+    percentageVoted: {
+      color: colors.primary.main,
+      fontWeight: '700',
+    },
+    footer: {
+      flexDirection: 'row',
+      justifyContent: 'space-between',
+      alignItems: 'center',
+      marginTop: spacing.md,
+      paddingTop: spacing.sm,
+      borderTopWidth: StyleSheet.hairlineWidth,
+      borderTopColor: colors.divider,
+    },
+    footerLeft: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: spacing.xs,
+    },
+    footerText: {
+      fontSize: fontSizes.sm,
+    },
+    unvoteButton: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: spacing.xs,
+      paddingVertical: spacing.xs,
+      paddingHorizontal: spacing.sm,
+      borderRadius: borderRadius.sm,
+      backgroundColor: colors.background.default,
+    },
+    unvoteText: {
+      fontSize: fontSizes.sm,
+    },
+    loadingOverlay: {
+      ...StyleSheet.absoluteFillObject,
+      backgroundColor: colors.background.paper + 'CC',
+      justifyContent: 'center',
+      alignItems: 'center',
+      borderRadius: borderRadius.lg,
+    },
+  });
+}
+
 const VoteCard: React.FC<VoteCardProps> = ({
   options,
   totalVotes,
@@ -38,7 +178,8 @@ const VoteCard: React.FC<VoteCardProps> = ({
   isLoading = false,
   compact = false,
 }) => {
-  // 动画值
+  const colors = useAppColors();
+  const styles = useMemo(() => createVoteCardStyles(colors), [colors]);
   const progressAnim = React.useRef(new Animated.Value(0)).current;
 
   React.useEffect(() => {
@@ -151,7 +292,7 @@ const VoteCard: React.FC<VoteCardProps> = ({
         </TouchableOpacity>
       </View>
     );
-  }, [hasVoted, votedOptionId, calculatePercentage, handleVote, isLoading, progressAnim, compact]);
+  }, [hasVoted, votedOptionId, calculatePercentage, handleVote, isLoading, progressAnim, compact, colors, styles]);
 
   // 排序后的选项（已投票的排在前面）
   const sortedOptions = React.useMemo(() => {
@@ -229,142 +370,4 @@ const VoteCard: React.FC<VoteCardProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
-  container: {
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.lg,
-    padding: spacing.md,
-    marginVertical: spacing.sm,
-    borderWidth: 1,
-    borderColor: colors.divider,
-  },
-  containerCompact: {
-    padding: spacing.sm,
-    marginVertical: spacing.xs,
-  },
-  header: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginBottom: spacing.sm,
-  },
-  headerIcon: {
-    width: 24,
-    height: 24,
-    borderRadius: borderRadius.sm,
-    backgroundColor: colors.primary.light + '20',
-    justifyContent: 'center',
-    alignItems: 'center',
-    marginRight: spacing.sm,
-  },
-  headerTitle: {
-    fontWeight: '600',
-    color: colors.text.primary,
-  },
-  optionsList: {
-    gap: spacing.sm,
-  },
-  optionContainer: {
-    position: 'relative',
-    borderRadius: borderRadius.md,
-    overflow: 'hidden',
-  },
-  progressBar: {
-    position: 'absolute',
-    top: 0,
-    left: 0,
-    bottom: 0,
-    borderRadius: borderRadius.md,
-  },
-  optionButton: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    paddingVertical: spacing.sm,
-    paddingHorizontal: spacing.md,
-    borderRadius: borderRadius.md,
-    backgroundColor: colors.background.default,
-    minHeight: 44,
-    borderWidth: 1,
-    borderColor: 'transparent',
-  },
-  optionButtonVoted: {
-    borderColor: colors.primary.main,
-    backgroundColor: 'transparent',
-  },
-  optionIndicator: {
-    width: 18,
-    height: 18,
-    borderRadius: borderRadius.full,
-    borderWidth: 2,
-    borderColor: colors.divider,
-    marginRight: spacing.sm,
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  optionIndicatorVoted: {
-    backgroundColor: colors.primary.main,
-    borderColor: colors.primary.main,
-  },
-  optionText: {
-    flex: 1,
-    fontSize: fontSizes.md,
-    color: colors.text.primary,
-    lineHeight: 20,
-  },
-  optionTextCompact: {
-    fontSize: fontSizes.sm,
-    lineHeight: 18,
-  },
-  resultContainer: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    marginLeft: spacing.sm,
-    minWidth: 40,
-    justifyContent: 'flex-end',
-  },
-  percentage: {
-    color: colors.text.secondary,
-    fontWeight: '500',
-  },
-  percentageVoted: {
-    color: colors.primary.main,
-    fontWeight: '700',
-  },
-  footer: {
-    flexDirection: 'row',
-    justifyContent: 'space-between',
-    alignItems: 'center',
-    marginTop: spacing.md,
-    paddingTop: spacing.sm,
-    borderTopWidth: StyleSheet.hairlineWidth,
-    borderTopColor: colors.divider,
-  },
-  footerLeft: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    gap: spacing.xs,
-  },
-  footerText: {
-    fontSize: fontSizes.sm,
-  },
-  unvoteButton: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    gap: spacing.xs,
-    paddingVertical: spacing.xs,
-    paddingHorizontal: spacing.sm,
-    borderRadius: borderRadius.sm,
-    backgroundColor: colors.background.default,
-  },
-  unvoteText: {
-    fontSize: fontSizes.sm,
-  },
-  loadingOverlay: {
-    ...StyleSheet.absoluteFillObject,
-    backgroundColor: colors.background.paper + 'CC',
-    justifyContent: 'center',
-    alignItems: 'center',
-    borderRadius: borderRadius.lg,
-  },
-});
-
 export default VoteCard;

src/components/business/VoteEditor.tsx

@@ -3,7 +3,7 @@
  * 用于创建帖子时编辑投票选项
  */
 
-import React, { useCallback } from 'react';
+import React, { useCallback, useMemo } from 'react';
 import {
   View,
   TouchableOpacity,
@@ -11,7 +11,7 @@ import {
   TextInput,
 } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, spacing, fontSizes, borderRadius } from '../../theme';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
 import Text from '../common/Text';
 
 interface VoteEditorProps {
@@ -24,6 +24,86 @@ interface VoteEditorProps {
   maxLength?: number;
 }
 
+function createVoteEditorStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      backgroundColor: colors.background.default,
+      borderRadius: borderRadius.lg,
+      marginHorizontal: spacing.lg,
+      marginTop: spacing.md,
+      marginBottom: spacing.md,
+      padding: spacing.md,
+    },
+    header: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'space-between',
+      marginBottom: spacing.md,
+    },
+    headerLeft: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: spacing.sm,
+    },
+    headerTitle: {
+      fontWeight: '600',
+      color: colors.text.primary,
+    },
+    optionsContainer: {
+      gap: spacing.sm,
+    },
+    optionRow: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: spacing.sm,
+    },
+    optionIndex: {
+      width: 20,
+      height: 20,
+      borderRadius: borderRadius.full,
+      backgroundColor: colors.background.disabled,
+      justifyContent: 'center',
+      alignItems: 'center',
+    },
+    optionInput: {
+      flex: 1,
+      fontSize: fontSizes.md,
+      color: colors.text.primary,
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.md,
+      paddingHorizontal: spacing.md,
+      paddingVertical: spacing.sm,
+      borderWidth: 1,
+      borderColor: colors.divider,
+      height: 44,
+    },
+    removeButton: {
+      padding: spacing.xs,
+    },
+    removeButtonPlaceholder: {
+      width: 28,
+    },
+    addOptionButton: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'center',
+      gap: spacing.sm,
+      paddingVertical: spacing.sm,
+      marginTop: spacing.xs,
+    },
+    addOptionText: {
+      fontWeight: '500',
+    },
+    hintContainer: {
+      marginTop: spacing.md,
+      paddingTop: spacing.sm,
+      borderTopWidth: StyleSheet.hairlineWidth,
+      borderTopColor: colors.divider,
+      alignItems: 'center',
+    },
+  });
+}
+
 const VoteEditor: React.FC<VoteEditorProps> = ({
   options,
   onAddOption,
@@ -33,6 +113,8 @@ const VoteEditor: React.FC<VoteEditorProps> = ({
   minOptions = 2,
   maxLength = 50,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createVoteEditorStyles(colors), [colors]);
   const validOptionsCount = options.filter(opt => opt.trim() !== '').length;
   const canAddOption = options.length < maxOptions;
   const canRemoveOption = options.length > minOptions;
@@ -122,82 +204,4 @@ const VoteEditor: React.FC<VoteEditorProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
-  container: {
-    backgroundColor: colors.background.default,
-    borderRadius: borderRadius.lg,
-    marginHorizontal: spacing.lg,
-    marginTop: spacing.md,
-    marginBottom: spacing.md,
-    padding: spacing.md,
-  },
-  header: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    justifyContent: 'space-between',
-    marginBottom: spacing.md,
-  },
-  headerLeft: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    gap: spacing.sm,
-  },
-  headerTitle: {
-    fontWeight: '600',
-    color: colors.text.primary,
-  },
-  optionsContainer: {
-    gap: spacing.sm,
-  },
-  optionRow: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    gap: spacing.sm,
-  },
-  optionIndex: {
-    width: 20,
-    height: 20,
-    borderRadius: borderRadius.full,
-    backgroundColor: colors.background.disabled,
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  optionInput: {
-    flex: 1,
-    fontSize: fontSizes.md,
-    color: colors.text.primary,
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.md,
-    paddingHorizontal: spacing.md,
-    paddingVertical: spacing.sm,
-    borderWidth: 1,
-    borderColor: colors.divider,
-    height: 44,
-  },
-  removeButton: {
-    padding: spacing.xs,
-  },
-  removeButtonPlaceholder: {
-    width: 28,
-  },
-  addOptionButton: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    justifyContent: 'center',
-    gap: spacing.sm,
-    paddingVertical: spacing.sm,
-    marginTop: spacing.xs,
-  },
-  addOptionText: {
-    fontWeight: '500',
-  },
-  hintContainer: {
-    marginTop: spacing.md,
-    paddingTop: spacing.sm,
-    borderTopWidth: StyleSheet.hairlineWidth,
-    borderTopColor: colors.divider,
-    alignItems: 'center',
-  },
-});
-
 export default VoteEditor;

src/components/business/VotePreview.tsx

@@ -3,14 +3,14 @@
  * 用于帖子列表中显示投票预览，类似微博风格
  */
 
-import React from 'react';
+import React, { useMemo } from 'react';
 import {
   View,
   TouchableOpacity,
   StyleSheet,
 } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, spacing, fontSizes, borderRadius } from '../../theme';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
 import Text from '../common/Text';
 
 interface VotePreviewProps {
@@ -19,11 +19,51 @@ interface VotePreviewProps {
   onPress?: () => void;
 }
 
+function createVotePreviewStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      backgroundColor: colors.primary.light + '08',
+      borderRadius: borderRadius.md,
+      padding: spacing.md,
+      marginTop: spacing.sm,
+      borderWidth: 1,
+      borderColor: colors.primary.light + '30',
+    },
+    iconContainer: {
+      width: 36,
+      height: 36,
+      borderRadius: borderRadius.md,
+      backgroundColor: colors.primary.light + '20',
+      justifyContent: 'center',
+      alignItems: 'center',
+      marginRight: spacing.sm,
+    },
+    content: {
+      flex: 1,
+    },
+    title: {
+      fontSize: fontSizes.md,
+      fontWeight: '600',
+      color: colors.text.primary,
+      marginBottom: 2,
+    },
+    subtitle: {
+      fontSize: fontSizes.sm,
+      color: colors.text.secondary,
+    },
+  });
+}
+
 const VotePreview: React.FC<VotePreviewProps> = ({
   totalVotes = 0,
   optionsCount = 0,
   onPress,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createVotePreviewStyles(colors), [colors]);
+
   // 格式化票数
   const formatVoteCount = (count: number): string => {
     if (count >= 10000) {
@@ -71,39 +111,4 @@ const VotePreview: React.FC<VotePreviewProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
-  container: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    backgroundColor: colors.primary.light + '08',
-    borderRadius: borderRadius.md,
-    padding: spacing.md,
-    marginTop: spacing.sm,
-    borderWidth: 1,
-    borderColor: colors.primary.light + '30',
-  },
-  iconContainer: {
-    width: 36,
-    height: 36,
-    borderRadius: borderRadius.md,
-    backgroundColor: colors.primary.light + '20',
-    justifyContent: 'center',
-    alignItems: 'center',
-    marginRight: spacing.sm,
-  },
-  content: {
-    flex: 1,
-  },
-  title: {
-    fontSize: fontSizes.md,
-    fontWeight: '600',
-    color: colors.text.primary,
-    marginBottom: 2,
-  },
-  subtitle: {
-    fontSize: fontSizes.sm,
-    color: colors.text.secondary,
-  },
-});
-
 export default VotePreview;

src/components/business/index.ts

@@ -2,10 +2,20 @@
  * 业务组件导出
  */
 
+// PostCard 新架构（从 PostCard 目录导出）
 export { default as PostCard } from './PostCard';
+// 导出 PostCard 相关类型和工具
+export type {
+  PostCardActionType,
+  PostCardAction,
+  PostCardOnAction,
+  PostCardFeatures,
+  PostCardFeaturesPreset,
+  PostCardFeaturesConfig,
+  PostCardProps,
+} from './PostCard';
 export { default as CommentItem } from './CommentItem';
 export { default as UserProfileHeader } from './UserProfileHeader';
-export { default as NotificationItem } from './NotificationItem';
 export { default as SystemMessageItem } from './SystemMessageItem';
 export { default as SearchBar } from './SearchBar';
 export { default as TabBar } from './TabBar';

src/components/common/AppBackButton.tsx

@@ -0,0 +1,58 @@
+import React from 'react';
+import { TouchableOpacity, StyleProp, ViewStyle, StyleSheet } from 'react-native';
+import { MaterialCommunityIcons } from '@expo/vector-icons';
+
+import { borderRadius, spacing, useAppColors } from '../../theme';
+
+type AppBackButtonIcon = 'arrow-left' | 'close';
+
+interface AppBackButtonProps {
+  onPress: () => void;
+  icon?: AppBackButtonIcon;
+  style?: StyleProp<ViewStyle>;
+  iconColor?: string;
+  backgroundColor?: string;
+  hitSlop?: number;
+  testID?: string;
+}
+
+const AppBackButton: React.FC<AppBackButtonProps> = ({
+  onPress,
+  icon = 'arrow-left',
+  style,
+  iconColor: iconColorProp,
+  backgroundColor: backgroundColorProp,
+  hitSlop = 8,
+  testID,
+}) => {
+  const colors = useAppColors();
+  const iconColor = iconColorProp ?? colors.text.primary;
+  const backgroundColor = backgroundColorProp ?? colors.background.paper;
+
+  return (
+    <TouchableOpacity
+      onPress={onPress}
+      style={[styles.button, { backgroundColor }, style]}
+      activeOpacity={0.75}
+      hitSlop={hitSlop}
+      testID={testID}
+      accessibilityRole="button"
+      accessibilityLabel={icon === 'close' ? '关闭' : '返回'}
+    >
+      <MaterialCommunityIcons name={icon} size={22} color={iconColor} />
+    </TouchableOpacity>
+  );
+};
+
+const styles = StyleSheet.create({
+  button: {
+    width: 36,
+    height: 36,
+    borderRadius: borderRadius.full,
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginLeft: spacing.xs,
+  },
+});
+
+export default AppBackButton;

src/components/common/AppDialogHost.tsx

@@ -5,10 +5,98 @@ import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { LinearGradient } from 'expo-linear-gradient';
 
 import { bindDialogListener, DialogPayload } from '../../services/dialogService';
-import { borderRadius, colors, shadows, spacing } from '../../theme';
+import { borderRadius, shadows, spacing, useAppColors, type AppColors } from '../../theme';
+
+function createDialogHostStyles(colors: AppColors) {
+  return StyleSheet.create({
+    backdrop: {
+      flex: 1,
+      backgroundColor: 'rgba(0, 0, 0, 0.36)',
+      justifyContent: 'center',
+      alignItems: 'center',
+      paddingHorizontal: spacing.xl,
+    },
+    container: {
+      width: '100%',
+      maxWidth: 380,
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius['2xl'],
+      paddingHorizontal: spacing.xl,
+      paddingTop: spacing.lg,
+      paddingBottom: spacing.lg,
+      ...shadows.lg,
+    },
+    iconHeader: {
+      alignItems: 'center',
+      marginBottom: spacing.md,
+    },
+    iconBadge: {
+      width: 42,
+      height: 42,
+      borderRadius: borderRadius.full,
+      justifyContent: 'center',
+      alignItems: 'center',
+    },
+    title: {
+      color: colors.text.primary,
+      fontSize: 18,
+      fontWeight: '700',
+      textAlign: 'center',
+    },
+    message: {
+      marginTop: spacing.md,
+      color: colors.text.secondary,
+      fontSize: 14,
+      lineHeight: 21,
+      textAlign: 'center',
+    },
+    actions: {
+      marginTop: spacing.xl,
+      gap: spacing.sm,
+    },
+    actionButton: {
+      height: 46,
+      borderRadius: borderRadius.lg,
+      borderWidth: 1,
+      borderColor: `${colors.primary.main}28`,
+      backgroundColor: colors.background.paper,
+      justifyContent: 'center',
+      alignItems: 'center',
+    },
+    primaryButton: {
+      backgroundColor: colors.primary.main,
+      borderColor: colors.primary.main,
+    },
+    cancelButton: {
+      backgroundColor: colors.background.paper,
+      borderColor: colors.divider,
+    },
+    destructiveButton: {
+      backgroundColor: `${colors.error.main}18`,
+      borderColor: `${colors.error.main}40`,
+    },
+    actionText: {
+      color: colors.text.primary,
+      fontSize: 15,
+      fontWeight: '700',
+    },
+    primaryText: {
+      color: colors.text.inverse,
+    },
+    cancelText: {
+      color: colors.text.secondary,
+      fontWeight: '600',
+    },
+    destructiveText: {
+      color: colors.error.main,
+    },
+  });
+}
 
 const AppDialogHost: React.FC = () => {
   const [dialog, setDialog] = useState<DialogPayload | null>(null);
+  const colors = useAppColors();
+  const styles = useMemo(() => createDialogHostStyles(colors), [colors]);
 
   useEffect(() => {
     const unbind = bindDialogListener((payload) => {
@@ -19,7 +107,7 @@ const AppDialogHost: React.FC = () => {
 
   const actions = useMemo<AlertButton[]>(() => {
     if (!dialog?.actions?.length) return [{ text: '确定' }];
-    return dialog.actions.slice(0, 3);
+    return dialog.actions;
   }, [dialog]);
 
   const onClose = () => {
@@ -101,88 +189,4 @@ const AppDialogHost: React.FC = () => {
   );
 };
 
-const styles = StyleSheet.create({
-  backdrop: {
-    flex: 1,
-    backgroundColor: 'rgba(0, 0, 0, 0.36)',
-    justifyContent: 'center',
-    alignItems: 'center',
-    paddingHorizontal: spacing.xl,
-  },
-  container: {
-    width: '100%',
-    maxWidth: 380,
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius['2xl'],
-    paddingHorizontal: spacing.xl,
-    paddingTop: spacing.lg,
-    paddingBottom: spacing.lg,
-    ...shadows.lg,
-  },
-  iconHeader: {
-    alignItems: 'center',
-    marginBottom: spacing.md,
-  },
-  iconBadge: {
-    width: 42,
-    height: 42,
-    borderRadius: borderRadius.full,
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  title: {
-    color: colors.text.primary,
-    fontSize: 18,
-    fontWeight: '700',
-    textAlign: 'center',
-  },
-  message: {
-    marginTop: spacing.md,
-    color: colors.text.secondary,
-    fontSize: 14,
-    lineHeight: 21,
-    textAlign: 'center',
-  },
-  actions: {
-    marginTop: spacing.xl,
-    gap: spacing.sm,
-  },
-  actionButton: {
-    height: 46,
-    borderRadius: borderRadius.lg,
-    borderWidth: 1,
-    borderColor: `${colors.primary.main}28`,
-    backgroundColor: '#FFFFFF',
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  primaryButton: {
-    backgroundColor: colors.primary.main,
-    borderColor: colors.primary.main,
-  },
-  cancelButton: {
-    backgroundColor: colors.background.paper,
-    borderColor: colors.divider,
-  },
-  destructiveButton: {
-    backgroundColor: '#FEECEC',
-    borderColor: '#FCD4D1',
-  },
-  actionText: {
-    color: colors.text.primary,
-    fontSize: 15,
-    fontWeight: '700',
-  },
-  primaryText: {
-    color: '#FFFFFF',
-  },
-  cancelText: {
-    color: colors.text.secondary,
-    fontWeight: '600',
-  },
-  destructiveText: {
-    color: colors.error.main,
-  },
-});
-
 export default AppDialogHost;

src/components/common/AppPromptBar.tsx

@@ -1,10 +1,10 @@
-import React, { useCallback, useEffect, useRef, useState } from 'react';
+import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { Animated, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 
 import { bindPromptListener, PromptPayload, PromptType } from '../../services/promptService';
-import { borderRadius, colors, shadows, spacing } from '../../theme';
+import { borderRadius, shadows, spacing, useAppColors, type AppColors } from '../../theme';
 
 interface PromptState extends PromptPayload {
   id: number;
@@ -12,29 +12,96 @@ interface PromptState extends PromptPayload {
 
 const DEFAULT_DURATION = 2200;
 
-const styleMap: Record<PromptType, { backgroundColor: string; icon: React.ComponentProps<typeof MaterialCommunityIcons>['name'] }> = {
-  info: { backgroundColor: '#FFFFFF', icon: 'information-outline' },
-  success: { backgroundColor: '#FFFFFF', icon: 'check-circle-outline' },
-  warning: { backgroundColor: '#FFFFFF', icon: 'alert-outline' },
-  error: { backgroundColor: '#FFFFFF', icon: 'alert-circle-outline' },
-};
-
-const iconColorMap: Record<PromptType, string> = {
-  info: colors.primary.main,
-  success: colors.success.main,
-  warning: colors.warning.dark,
-  error: colors.error.main,
-};
-
-const accentColorMap: Record<PromptType, string> = {
-  info: colors.primary.main,
-  success: colors.success.main,
-  warning: colors.warning.main,
-  error: colors.error.main,
-};
+function createPromptBarStyles(colors: AppColors) {
+  return StyleSheet.create({
+    wrapper: {
+      position: 'absolute',
+      left: spacing.md,
+      right: spacing.md,
+      zIndex: 9999,
+    },
+    card: {
+      borderRadius: borderRadius.xl,
+      paddingVertical: spacing.md,
+      paddingHorizontal: spacing.md,
+      borderWidth: 1,
+      borderColor: `${colors.primary.main}22`,
+      flexDirection: 'row',
+      alignItems: 'center',
+      overflow: 'hidden',
+      ...shadows.lg,
+    },
+    accentBar: {
+      position: 'absolute',
+      left: 0,
+      top: 0,
+      bottom: 0,
+      width: 4,
+    },
+    iconWrap: {
+      width: 32,
+      height: 32,
+      borderRadius: borderRadius.full,
+      backgroundColor: `${colors.primary.main}12`,
+      alignItems: 'center',
+      justifyContent: 'center',
+      marginRight: spacing.md,
+    },
+    textWrap: {
+      flex: 1,
+      paddingRight: spacing.sm,
+    },
+    title: {
+      color: colors.text.primary,
+      fontWeight: '700',
+      fontSize: 14,
+      marginBottom: 2,
+    },
+    message: {
+      color: colors.text.primary,
+      fontSize: 13,
+      lineHeight: 18,
+    },
+  });
+}
 
 const AppPromptBar: React.FC = () => {
   const insets = useSafeAreaInsets();
+  const colors = useAppColors();
+  const styles = useMemo(() => createPromptBarStyles(colors), [colors]);
+
+  const styleMap = useMemo<
+    Record<PromptType, { backgroundColor: string; icon: React.ComponentProps<typeof MaterialCommunityIcons>['name'] }>
+  >(
+    () => ({
+      info: { backgroundColor: colors.background.paper, icon: 'information-outline' },
+      success: { backgroundColor: colors.background.paper, icon: 'check-circle-outline' },
+      warning: { backgroundColor: colors.background.paper, icon: 'alert-outline' },
+      error: { backgroundColor: colors.background.paper, icon: 'alert-circle-outline' },
+    }),
+    [colors.background.paper],
+  );
+
+  const iconColorMap = useMemo(
+    () => ({
+      info: colors.primary.main,
+      success: colors.success.main,
+      warning: colors.warning.dark,
+      error: colors.error.main,
+    }),
+    [colors.primary.main, colors.success.main, colors.warning.dark, colors.error.main],
+  );
+
+  const accentColorMap = useMemo(
+    () => ({
+      info: colors.primary.main,
+      success: colors.success.main,
+      warning: colors.warning.main,
+      error: colors.error.main,
+    }),
+    [colors.primary.main, colors.success.main, colors.warning.main, colors.error.main],
+  );
+
   const [prompt, setPrompt] = useState<PromptState | null>(null);
   const hideTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
   const animation = useRef(new Animated.Value(0)).current;
@@ -131,55 +198,4 @@ const AppPromptBar: React.FC = () => {
   );
 };
 
-const styles = StyleSheet.create({
-  wrapper: {
-    position: 'absolute',
-    left: spacing.md,
-    right: spacing.md,
-    zIndex: 9999,
-  },
-  card: {
-    borderRadius: borderRadius.xl,
-    paddingVertical: spacing.md,
-    paddingHorizontal: spacing.md,
-    borderWidth: 1,
-    borderColor: `${colors.primary.main}22`,
-    flexDirection: 'row',
-    alignItems: 'center',
-    overflow: 'hidden',
-    ...shadows.lg,
-  },
-  accentBar: {
-    position: 'absolute',
-    left: 0,
-    top: 0,
-    bottom: 0,
-    width: 4,
-  },
-  iconWrap: {
-    width: 32,
-    height: 32,
-    borderRadius: borderRadius.full,
-    backgroundColor: `${colors.primary.main}12`,
-    alignItems: 'center',
-    justifyContent: 'center',
-    marginRight: spacing.md,
-  },
-  textWrap: {
-    flex: 1,
-    paddingRight: spacing.sm,
-  },
-  title: {
-    color: colors.text.primary,
-    fontWeight: '700',
-    fontSize: 14,
-    marginBottom: 2,
-  },
-  message: {
-    color: colors.text.primary,
-    fontSize: 13,
-    lineHeight: 18,
-  },
-});
-
 export default AppPromptBar;

src/components/common/Avatar.tsx

@@ -4,7 +4,7 @@
  * 使用 expo-image 实现内存+磁盘双级缓存，头像秒加载
  */
 
-import React from 'react';
+import React, { useMemo } from 'react';
 import {
   View,
   TouchableOpacity,
@@ -12,7 +12,7 @@ import {
   ViewStyle,
 } from 'react-native';
 import { Image as ExpoImage } from 'expo-image';
-import { colors, borderRadius } from '../../theme';
+import { borderRadius, useAppColors, type AppColors } from '../../theme';
 import Text from './Text';
 
 type AvatarSource = string | { uri: string } | number | null;
@@ -27,29 +27,50 @@ interface AvatarProps {
   style?: ViewStyle;
 }
 
+function createAvatarStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      position: 'relative',
+    },
+    image: {
+      backgroundColor: colors.background.disabled,
+    },
+    placeholder: {
+      backgroundColor: colors.primary.main,
+      justifyContent: 'center',
+      alignItems: 'center',
+    },
+    badge: {
+      position: 'absolute',
+      borderWidth: 2,
+      borderColor: colors.background.paper,
+    },
+  });
+}
+
 const Avatar: React.FC<AvatarProps> = ({
   source,
   size = 40,
   name,
   onPress,
   showBadge = false,
-  badgeColor = colors.success.main,
+  badgeColor,
   style,
 }) => {
-  // 获取首字母
+  const colors = useAppColors();
+  const styles = useMemo(() => createAvatarStyles(colors), [colors]);
+  const resolvedBadgeColor = badgeColor ?? colors.success.main;
+
   const getInitial = (): string => {
     if (!name) return '?';
     const firstChar = name.charAt(0).toUpperCase();
-    // 中文字符
     if (/[\u4e00-\u9fa5]/.test(firstChar)) {
       return firstChar;
     }
     return firstChar;
   };
 
-  // 渲染头像内容
   const renderAvatarContent = () => {
-    // 如果有图片源
     if (source) {
       const imageSource =
         typeof source === 'string' ? { uri: source } : source;
@@ -72,7 +93,6 @@ const Avatar: React.FC<AvatarProps> = ({
       );
     }
 
-    // 显示首字母
     const fontSize = size / 2;
     return (
       <View
@@ -100,7 +120,7 @@ const Avatar: React.FC<AvatarProps> = ({
           style={[
             styles.badge,
             {
-              backgroundColor: badgeColor,
+              backgroundColor: resolvedBadgeColor,
               width: size * 0.3,
               height: size * 0.3,
               borderRadius: (size * 0.3) / 2,
@@ -124,23 +144,4 @@ const Avatar: React.FC<AvatarProps> = ({
   return avatarContainer;
 };
 
-const styles = StyleSheet.create({
-  container: {
-    position: 'relative',
-  },
-  image: {
-    backgroundColor: colors.background.disabled,
-  },
-  placeholder: {
-    backgroundColor: colors.primary.main,
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  badge: {
-    position: 'absolute',
-    borderWidth: 2,
-    borderColor: colors.background.paper,
-  },
-});
-
 export default Avatar;

src/components/common/Button.tsx

@@ -3,7 +3,7 @@
  * 支持多种变体、尺寸、加载状态和图标
  */
 
-import React from 'react';
+import React, { useMemo } from 'react';
 import {
   TouchableOpacity,
   ActivityIndicator,
@@ -13,7 +13,7 @@ import {
   TextStyle,
 } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, borderRadius, spacing, fontSizes, shadows } from '../../theme';
+import { borderRadius, spacing, fontSizes, useAppColors, type AppColors } from '../../theme';
 import Text from './Text';
 
 type ButtonVariant = 'primary' | 'secondary' | 'outline' | 'text' | 'danger';
@@ -27,12 +27,86 @@ interface ButtonProps {
   size?: ButtonSize;
   disabled?: boolean;
   loading?: boolean;
-  icon?: string; // MaterialCommunityIcons name
+  icon?: string;
   iconPosition?: IconPosition;
   fullWidth?: boolean;
   style?: ViewStyle;
 }
 
+function createButtonStyles(colors: AppColors) {
+  return StyleSheet.create({
+    base: {
+      justifyContent: 'center',
+      alignItems: 'center',
+      borderRadius: borderRadius.md,
+    },
+    content: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+    size_sm: {
+      paddingVertical: spacing.sm,
+      paddingHorizontal: spacing.md,
+      minHeight: 32,
+    },
+    size_md: {
+      paddingVertical: spacing.md,
+      paddingHorizontal: spacing.lg,
+      minHeight: 40,
+    },
+    size_lg: {
+      paddingVertical: spacing.lg,
+      paddingHorizontal: spacing.xl,
+      minHeight: 48,
+    },
+    primary: {
+      backgroundColor: colors.primary.main,
+    },
+    secondary: {
+      backgroundColor: colors.secondary.main,
+    },
+    outline: {
+      backgroundColor: 'transparent',
+      borderWidth: 1,
+      borderColor: colors.primary.main,
+    },
+    text: {
+      backgroundColor: 'transparent',
+      shadowColor: 'transparent',
+      elevation: 0,
+    },
+    danger: {
+      backgroundColor: colors.error.main,
+    },
+    disabled: {
+      backgroundColor: colors.background.disabled,
+      borderColor: colors.background.disabled,
+    },
+    fullWidth: {
+      width: '100%',
+    },
+    textBase: {
+      fontWeight: '600',
+    },
+    textSize_sm: {
+      fontSize: fontSizes.sm,
+    },
+    textSize_md: {
+      fontSize: fontSizes.md,
+    },
+    textSize_lg: {
+      fontSize: fontSizes.lg,
+    },
+    iconLeft: {
+      marginRight: spacing.sm,
+    },
+    iconRight: {
+      marginLeft: spacing.sm,
+    },
+  });
+}
+
 const Button: React.FC<ButtonProps> = ({
   title,
   onPress,
@@ -45,11 +119,12 @@ const Button: React.FC<ButtonProps> = ({
   fullWidth = false,
   style,
 }) => {
-  // 获取按钮样式
+  const colors = useAppColors();
+  const styles = useMemo(() => createButtonStyles(colors), [colors]);
+
   const getButtonStyle = (): ViewStyle[] => {
     const baseStyle: ViewStyle[] = [styles.base, styles[`size_${size}`]];
 
-    // 变体样式
     switch (variant) {
       case 'primary':
         baseStyle.push(styles.primary);
@@ -68,12 +143,10 @@ const Button: React.FC<ButtonProps> = ({
         break;
     }
 
-    // 禁用状态
     if (disabled || loading) {
       baseStyle.push(styles.disabled);
     }
 
-    // 全宽度
     if (fullWidth) {
       baseStyle.push(styles.fullWidth);
     }
@@ -81,7 +154,6 @@ const Button: React.FC<ButtonProps> = ({
     return baseStyle;
   };
 
-  // 获取文本样式
   const getTextStyle = (): TextStyle => {
     const baseStyle: TextStyle = {
       ...styles.textBase,
@@ -109,7 +181,6 @@ const Button: React.FC<ButtonProps> = ({
     return baseStyle;
   };
 
-  // 获取图标大小
   const getIconSize = (): number => {
     switch (size) {
       case 'sm':
@@ -121,7 +192,6 @@ const Button: React.FC<ButtonProps> = ({
     }
   };
 
-  // 获取图标颜色
   const getIconColor = (): string => {
     if (disabled || loading) {
       return colors.text.disabled;
@@ -150,9 +220,9 @@ const Button: React.FC<ButtonProps> = ({
       {loading ? (
         <ActivityIndicator
           size="small"
-          color={variant === 'outline' || variant === 'text' 
-            ? colors.primary.main 
-            : colors.text.inverse}
+          color={
+            variant === 'outline' || variant === 'text' ? colors.primary.main : colors.text.inverse
+          }
         />
       ) : (
         <View style={styles.content}>
@@ -179,82 +249,4 @@ const Button: React.FC<ButtonProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
-  base: {
-    justifyContent: 'center',
-    alignItems: 'center',
-    borderRadius: borderRadius.md,
-  },
-  content: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  // 尺寸样式
-  size_sm: {
-    paddingVertical: spacing.sm,
-    paddingHorizontal: spacing.md,
-    minHeight: 32,
-  },
-  size_md: {
-    paddingVertical: spacing.md,
-    paddingHorizontal: spacing.lg,
-    minHeight: 40,
-  },
-  size_lg: {
-    paddingVertical: spacing.lg,
-    paddingHorizontal: spacing.xl,
-    minHeight: 48,
-  },
-  // 变体样式
-  primary: {
-    backgroundColor: colors.primary.main,
-  },
-  secondary: {
-    backgroundColor: colors.secondary.main,
-  },
-  outline: {
-    backgroundColor: 'transparent',
-    borderWidth: 1,
-    borderColor: colors.primary.main,
-  },
-  text: {
-    backgroundColor: 'transparent',
-    shadowColor: 'transparent',
-    elevation: 0,
-  },
-  danger: {
-    backgroundColor: colors.error.main,
-  },
-  // 禁用状态
-  disabled: {
-    backgroundColor: colors.background.disabled,
-    borderColor: colors.background.disabled,
-  },
-  // 全宽度
-  fullWidth: {
-    width: '100%',
-  },
-  // 文本样式
-  textBase: {
-    fontWeight: '600',
-  },
-  textSize_sm: {
-    fontSize: fontSizes.sm,
-  },
-  textSize_md: {
-    fontSize: fontSizes.md,
-  },
-  textSize_lg: {
-    fontSize: fontSizes.lg,
-  },
-  // 图标样式
-  iconLeft: {
-    marginRight: spacing.sm,
-  },
-  iconRight: {
-    marginLeft: spacing.sm,
-  },
-});
-
 export default Button;

src/components/common/Card.tsx

@@ -3,9 +3,9 @@
  * 白色背景、圆角、阴影，支持点击
  */
 
-import React from 'react';
+import React, { useMemo } from 'react';
 import { View, TouchableOpacity, StyleSheet, ViewStyle } from 'react-native';
-import { colors, borderRadius, spacing, shadows } from '../../theme';
+import { borderRadius, spacing, shadows, useAppColors, type AppColors } from '../../theme';
 
 type ShadowSize = 'sm' | 'md' | 'lg';
 
@@ -13,10 +13,20 @@ interface CardProps {
   children: React.ReactNode;
   onPress?: () => void;
   padding?: number;
-  shadow?: ShadowSize;
+  shadow?: ShadowSize | 'none';
   style?: ViewStyle;
 }
 
+function createCardStyles(colors: AppColors) {
+  return StyleSheet.create({
+    card: {
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.lg,
+      overflow: 'hidden',
+    },
+  });
+}
+
 const Card: React.FC<CardProps> = ({
   children,
   onPress,
@@ -24,13 +34,11 @@ const Card: React.FC<CardProps> = ({
   shadow = 'none',
   style,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createCardStyles(colors), [colors]);
   const shadowStyle = shadow !== 'none' ? shadows[shadow as keyof typeof shadows] : undefined;
 
-  const cardStyle = [
-    styles.card,
-    { padding },
-    shadowStyle,
-  ].filter(Boolean);
+  const cardStyle = [styles.card, { padding }, shadowStyle].filter(Boolean);
 
   if (onPress) {
     return (
@@ -47,12 +55,4 @@ const Card: React.FC<CardProps> = ({
   return <View style={[...cardStyle, style]}>{children}</View>;
 };
 
-const styles = StyleSheet.create({
-  card: {
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.lg,
-    overflow: 'hidden',
-  },
-});
-
 export default Card;

src/components/common/Divider.tsx

@@ -5,7 +5,7 @@
 
 import React from 'react';
 import { View, StyleSheet, ViewStyle } from 'react-native';
-import { colors, spacing } from '../../theme';
+import { spacing, useAppColors } from '../../theme';
 
 interface DividerProps {
   margin?: number;
@@ -13,16 +13,14 @@ interface DividerProps {
   style?: ViewStyle;
 }
 
-const Divider: React.FC<DividerProps> = ({
-  margin = spacing.lg,
-  color = colors.divider,
-  style,
-}) => {
+const Divider: React.FC<DividerProps> = ({ margin = spacing.lg, color, style }) => {
+  const colors = useAppColors();
+  const lineColor = color ?? colors.divider;
   return (
     <View
       style={[
         styles.divider,
-        { marginVertical: margin, backgroundColor: color },
+        { marginVertical: margin, backgroundColor: lineColor },
         style,
       ]}
     />

src/components/common/EmptyState.tsx

@@ -3,10 +3,10 @@
  * 显示空数据时的占位界面，采用现代插图风格设计
  */
 
-import React from 'react';
-import { View, StyleSheet, ViewStyle, Dimensions } from 'react-native';
+import React, { useMemo } from 'react';
+import { View, StyleSheet, ViewStyle } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, spacing, fontSizes, borderRadius } from '../../theme';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
 import Text from './Text';
 import Button from './Button';
 
@@ -20,6 +20,109 @@ interface EmptyStateProps {
   variant?: 'default' | 'modern' | 'compact';
 }
 
+function createEmptyStateStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flex: 1,
+      alignItems: 'center',
+      justifyContent: 'center',
+      padding: spacing.xl,
+    },
+    icon: {
+      marginBottom: spacing.lg,
+    },
+    title: {
+      textAlign: 'center',
+      marginBottom: spacing.sm,
+    },
+    description: {
+      textAlign: 'center',
+      marginBottom: spacing.lg,
+    },
+    button: {
+      minWidth: 120,
+    },
+    modernContainer: {
+      flex: 1,
+      alignItems: 'center',
+      justifyContent: 'center',
+      padding: spacing.xl,
+      minHeight: 280,
+    },
+    illustrationContainer: {
+      position: 'relative',
+      alignItems: 'center',
+      justifyContent: 'center',
+      marginBottom: spacing.xl,
+      width: 120,
+      height: 120,
+    },
+    iconBackground: {
+      width: 100,
+      height: 100,
+      borderRadius: borderRadius['2xl'],
+      backgroundColor: colors.primary.main + '15',
+      alignItems: 'center',
+      justifyContent: 'center',
+      shadowColor: colors.primary.main,
+      shadowOffset: { width: 0, height: 4 },
+      shadowOpacity: 0.2,
+      shadowRadius: 12,
+      elevation: 4,
+    },
+    modernIcon: {
+      opacity: 0.9,
+    },
+    decorativeCircle1: {
+      position: 'absolute',
+      width: 24,
+      height: 24,
+      borderRadius: borderRadius.full,
+      backgroundColor: colors.primary.light + '30',
+      top: 5,
+      right: 10,
+    },
+    decorativeCircle2: {
+      position: 'absolute',
+      width: 16,
+      height: 16,
+      borderRadius: borderRadius.full,
+      backgroundColor: colors.primary.main + '20',
+      bottom: 15,
+      left: 5,
+    },
+    modernTitle: {
+      textAlign: 'center',
+      marginBottom: spacing.sm,
+      fontWeight: '700',
+      fontSize: fontSizes.xl,
+    },
+    modernDescription: {
+      textAlign: 'center',
+      marginBottom: spacing.lg,
+      fontSize: fontSizes.md,
+      lineHeight: 22,
+      maxWidth: 280,
+    },
+    modernButton: {
+      minWidth: 140,
+      borderRadius: borderRadius.lg,
+    },
+    compactContainer: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      justifyContent: 'center',
+      padding: spacing.lg,
+    },
+    compactIcon: {
+      marginRight: spacing.sm,
+    },
+    compactTitle: {
+      fontSize: fontSizes.md,
+    },
+  });
+}
+
 const EmptyState: React.FC<EmptyStateProps> = ({
   icon = 'folder-open-outline',
   title,
@@ -29,7 +132,9 @@ const EmptyState: React.FC<EmptyStateProps> = ({
   style,
   variant = 'modern',
 }) => {
-  // 现代风格空状态
+  const colors = useAppColors();
+  const styles = useMemo(() => createEmptyStateStyles(colors), [colors]);
+
   if (variant === 'modern') {
     return (
       <View style={[styles.modernContainer, style]}>
@@ -45,19 +150,11 @@ const EmptyState: React.FC<EmptyStateProps> = ({
           <View style={styles.decorativeCircle1} />
           <View style={styles.decorativeCircle2} />
         </View>
-        <Text
-          variant="h3"
-          color={colors.text.primary}
-          style={styles.modernTitle}
-        >
+        <Text variant="h3" color={colors.text.primary} style={styles.modernTitle}>
           {title}
         </Text>
         {description && (
-          <Text
-            variant="body"
-            color={colors.text.secondary}
-            style={styles.modernDescription}
-          >
+          <Text variant="body" color={colors.text.secondary} style={styles.modernDescription}>
             {description}
           </Text>
         )}
@@ -74,7 +171,6 @@ const EmptyState: React.FC<EmptyStateProps> = ({
     );
   }
 
-  // 紧凑风格
   if (variant === 'compact') {
     return (
       <View style={[styles.compactContainer, style]}>
@@ -84,18 +180,13 @@ const EmptyState: React.FC<EmptyStateProps> = ({
           color={colors.text.disabled}
           style={styles.compactIcon}
         />
-        <Text
-          variant="body"
-          color={colors.text.secondary}
-          style={styles.compactTitle}
-        >
+        <Text variant="body" color={colors.text.secondary} style={styles.compactTitle}>
           {title}
         </Text>
       </View>
     );
   }
 
-  // 默认风格
   return (
     <View style={[styles.container, style]}>
       <MaterialCommunityIcons
@@ -104,19 +195,11 @@ const EmptyState: React.FC<EmptyStateProps> = ({
         color={colors.text.disabled}
         style={styles.icon}
       />
-      <Text
-        variant="h3"
-        color={colors.text.secondary}
-        style={styles.title}
-      >
+      <Text variant="h3" color={colors.text.secondary} style={styles.title}>
         {title}
       </Text>
       {description && (
-        <Text
-          variant="body"
-          color={colors.text.secondary}
-          style={styles.description}
-        >
+        <Text variant="body" color={colors.text.secondary} style={styles.description}>
           {description}
         </Text>
       )}
@@ -133,110 +216,4 @@ const EmptyState: React.FC<EmptyStateProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
-  // 默认风格
-  container: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    padding: spacing.xl,
-  },
-  icon: {
-    marginBottom: spacing.lg,
-  },
-  title: {
-    textAlign: 'center',
-    marginBottom: spacing.sm,
-  },
-  description: {
-    textAlign: 'center',
-    marginBottom: spacing.lg,
-  },
-  button: {
-    minWidth: 120,
-  },
-
-  // 现代风格
-  modernContainer: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    padding: spacing.xl,
-    minHeight: 280,
-  },
-  illustrationContainer: {
-    position: 'relative',
-    alignItems: 'center',
-    justifyContent: 'center',
-    marginBottom: spacing.xl,
-    width: 120,
-    height: 120,
-  },
-  iconBackground: {
-    width: 100,
-    height: 100,
-    borderRadius: borderRadius['2xl'],
-    backgroundColor: colors.primary.main + '15',
-    alignItems: 'center',
-    justifyContent: 'center',
-    shadowColor: colors.primary.main,
-    shadowOffset: { width: 0, height: 4 },
-    shadowOpacity: 0.2,
-    shadowRadius: 12,
-    elevation: 4,
-  },
-  modernIcon: {
-    opacity: 0.9,
-  },
-  decorativeCircle1: {
-    position: 'absolute',
-    width: 24,
-    height: 24,
-    borderRadius: borderRadius.full,
-    backgroundColor: colors.primary.light + '30',
-    top: 5,
-    right: 10,
-  },
-  decorativeCircle2: {
-    position: 'absolute',
-    width: 16,
-    height: 16,
-    borderRadius: borderRadius.full,
-    backgroundColor: colors.primary.main + '20',
-    bottom: 15,
-    left: 5,
-  },
-  modernTitle: {
-    textAlign: 'center',
-    marginBottom: spacing.sm,
-    fontWeight: '700',
-    fontSize: fontSizes.xl,
-  },
-  modernDescription: {
-    textAlign: 'center',
-    marginBottom: spacing.lg,
-    fontSize: fontSizes.md,
-    lineHeight: 22,
-    maxWidth: 280,
-  },
-  modernButton: {
-    minWidth: 140,
-    borderRadius: borderRadius.lg,
-  },
-
-  // 紧凑风格
-  compactContainer: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    justifyContent: 'center',
-    padding: spacing.lg,
-  },
-  compactIcon: {
-    marginRight: spacing.sm,
-  },
-  compactTitle: {
-    fontSize: fontSizes.md,
-  },
-});
-
 export default EmptyState;

src/components/common/ImageGallery.tsx

@@ -4,7 +4,7 @@
  * 使用 expo-image，原生支持 GIF/WebP 动图
  */
 
-import React, { useState, useCallback, useEffect, useMemo } from 'react';
+import React, { useState, useCallback, useEffect, useMemo, useRef } from 'react';
 import {
   Modal,
   View,
@@ -13,7 +13,6 @@ import {
   TouchableOpacity,
   Text,
   StatusBar,
-  ActivityIndicator,
   Alert,
 } from 'react-native';
 import { Image as ExpoImage } from 'expo-image';
@@ -25,16 +24,14 @@ import {
 import Animated, {
   useSharedValue,
   useAnimatedStyle,
-  useDerivedValue,
   runOnJS,
   withTiming,
-  withSpring,
 } from 'react-native-reanimated';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import * as MediaLibrary from 'expo-media-library';
 import { File, Paths } from 'expo-file-system';
-import { colors, spacing, borderRadius, fontSizes } from '../../theme';
+import { spacing, borderRadius, fontSizes } from '../../theme';
 
 const { width: SCREEN_WIDTH, height: SCREEN_HEIGHT } = Dimensions.get('window');
 
@@ -84,9 +81,13 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
   onSave,
   backgroundOpacity = 1,
 }) => {
+  const closeTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+  const isClosingRef = useRef(false);
+  const currentIndexRef = useRef(initialIndex);
+  const pendingSwipeDirectionRef = useRef<-1 | 1 | null>(null);
   const [currentIndex, setCurrentIndex] = useState(initialIndex);
+  currentIndexRef.current = currentIndex;
   const [showControls, setShowControls] = useState(true);
-  const [loading, setLoading] = useState(true);
   const [error, setError] = useState(false);
   const [saving, setSaving] = useState(false);
   const [saveToast, setSaveToast] = useState<'success' | 'error' | null>(null);
@@ -127,7 +128,6 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
     if (visible) {
       setCurrentIndex(initialIndex);
       setShowControls(true);
-      setLoading(true);
       setError(false);
       resetZoom();
       StatusBar.setHidden(true, 'fade');
@@ -136,37 +136,61 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
     }
   }, [visible, initialIndex, resetZoom]);
 
-  // 图片变化时重置加载状态和缩放
   useEffect(() => {
-    setLoading(true);
-    setError(false);
+    if (visible) {
+      isClosingRef.current = false;
+    }
+  }, [visible]);
+
+  useEffect(() => {
+    return () => {
+      if (closeTimerRef.current) {
+        clearTimeout(closeTimerRef.current);
+      }
+    };
+  }, []);
+
+  // 图片变化时重置缩放（加载态在 updateIndex / 打开弹窗时同步设置，避免晚一帧仍显示上一张）
+  useEffect(() => {
     resetZoom();
   }, [currentImage?.id, resetZoom]);
 
   const updateIndex = useCallback(
     (newIndex: number) => {
       const clampedIndex = Math.max(0, Math.min(validImages.length - 1, newIndex));
+      if (clampedIndex === currentIndexRef.current) {
+        return;
+      }
+      setError(false);
       setCurrentIndex(clampedIndex);
       onIndexChange?.(clampedIndex);
     },
     [validImages.length, onIndexChange]
   );
 
+  const updateIndexFromSwipe = useCallback(
+    (newIndex: number, direction: -1 | 1) => {
+      pendingSwipeDirectionRef.current = direction;
+      updateIndex(newIndex);
+    },
+    [updateIndex]
+  );
+
   const toggleControls = useCallback(() => {
     setShowControls(prev => !prev);
   }, []);
 
-  const goToPrev = useCallback(() => {
-    if (currentIndex > 0) {
-      updateIndex(currentIndex - 1);
+  const requestClose = useCallback(() => {
+    if (isClosingRef.current) {
+      return;
     }
-  }, [currentIndex, updateIndex]);
 
-  const goToNext = useCallback(() => {
-    if (currentIndex < validImages.length - 1) {
-      updateIndex(currentIndex + 1);
-    }
-  }, [currentIndex, validImages.length, updateIndex]);
+    isClosingRef.current = true;
+    // 延迟一个短时间窗口，避免关闭同一触摸触发到底层组件
+    closeTimerRef.current = setTimeout(() => {
+      onClose();
+    }, 120);
+  }, [onClose]);
 
   // 显示短暂提示
   const showToast = useCallback((type: 'success' | 'error') => {
@@ -236,6 +260,30 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
   // 滑动切换图片相关状态
   const swipeTranslateX = useSharedValue(0);
 
+  useEffect(() => {
+    pendingSwipeDirectionRef.current = null;
+    swipeTranslateX.value = 0;
+  }, [currentIndex, swipeTranslateX]);
+
+  const switchWithDirection = useCallback(
+    (targetIndex: number, direction: -1 | 1) => {
+      updateIndexFromSwipe(targetIndex, direction);
+    },
+    [updateIndexFromSwipe]
+  );
+
+  const goToPrev = useCallback(() => {
+    if (currentIndex > 0) {
+      switchWithDirection(currentIndex - 1, 1);
+    }
+  }, [currentIndex, switchWithDirection]);
+
+  const goToNext = useCallback(() => {
+    if (currentIndex < validImages.length - 1) {
+      switchWithDirection(currentIndex + 1, -1);
+    }
+  }, [currentIndex, validImages.length, switchWithDirection]);
+
   // 统一的滑动手势：放大时拖动，未放大时切换图片
   const panGesture = Gesture.Pan()
     .activeOffsetX([-10, 10])  // 水平方向需要移动10pt才激活，避免与点击冲突
@@ -248,16 +296,6 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
         // 放大状态下：拖动图片
         translateX.value = savedTranslateX.value + e.translationX;
         translateY.value = savedTranslateY.value + e.translationY;
-      } else if (validImages.length > 1) {
-        // 未放大且有多张图片：切换图片的跟随效果
-        const isFirst = currentIndex === 0 && e.translationX > 0;
-        const isLast = currentIndex === validImages.length - 1 && e.translationX < 0;
-        if (isFirst || isLast) {
-          // 边界阻力效果
-          swipeTranslateX.value = e.translationX * 0.3;
-        } else {
-          swipeTranslateX.value = e.translationX;
-        }
       }
     })
     .onEnd((e) => {
@@ -275,19 +313,10 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
 
         if (shouldGoNext && currentIndex < validImages.length - 1) {
           // 向左滑动，显示下一张
-          swipeTranslateX.value = withTiming(-SCREEN_WIDTH, { duration: 200 }, () => {
-            runOnJS(updateIndex)(currentIndex + 1);
-            swipeTranslateX.value = 0;
-          });
+          runOnJS(updateIndexFromSwipe)(currentIndex + 1, -1);
         } else if (shouldGoPrev && currentIndex > 0) {
           // 向右滑动，显示上一张
-          swipeTranslateX.value = withTiming(SCREEN_WIDTH, { duration: 200 }, () => {
-            runOnJS(updateIndex)(currentIndex - 1);
-            swipeTranslateX.value = 0;
-          });
-        } else {
-          // 回弹到原位
-          swipeTranslateX.value = withTiming(0, { duration: 200 });
+          runOnJS(updateIndexFromSwipe)(currentIndex - 1, 1);
         }
       }
     });
@@ -297,7 +326,7 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
     .numberOfTaps(1)
     .maxDistance(10)
     .onEnd(() => {
-      runOnJS(onClose)();
+      runOnJS(requestClose)();
     });
 
   // 组合手势：
@@ -326,7 +355,7 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
       visible={visible}
       transparent
       animationType="fade"
-      onRequestClose={onClose}
+      onRequestClose={requestClose}
       statusBarTranslucent
     >
       <GestureHandlerRootView style={styles.root}>
@@ -334,7 +363,7 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
           {/* 顶部控制栏 */}
           {showControls && (
             <View style={[styles.header, { paddingTop: insets.top + spacing.md }]}>
-              <TouchableOpacity style={styles.closeButton} onPress={onClose}>
+              <TouchableOpacity style={styles.closeButton} onPress={requestClose}>
                 <MaterialCommunityIcons name="close" size={24} color="#FFF" />
               </TouchableOpacity>
 
@@ -351,7 +380,7 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
                   disabled={saving}
                 >
                   {saving ? (
-                    <ActivityIndicator size="small" color="#FFF" />
+                    <MaterialCommunityIcons name="loading" size={24} color="#FFF" />
                   ) : (
                     <MaterialCommunityIcons name="download" size={24} color="#FFF" />
                   )}
@@ -363,12 +392,6 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
           {/* 图片显示区域 */}
           <GestureDetector gesture={composedGesture}>
             <View style={styles.imageContainer}>
-              {loading && (
-                <View style={styles.loadingContainer}>
-                  <ActivityIndicator size="large" color="#FFF" />
-                </View>
-              )}
-
               {error && (
                 <View style={styles.errorContainer}>
                   <MaterialCommunityIcons name="image-off" size={48} color="#999" />
@@ -384,15 +407,13 @@ export const ImageGallery: React.FC<ImageGalleryProps> = ({
                     contentFit="contain"
                     cachePolicy="disk"
                     priority="high"
-                    recyclingKey={currentImage.id}
+                    recyclingKey={currentImage.url}
+                    transition={null}
                     allowDownscaling
-                    onLoadStart={() => setLoading(true)}
                     onLoad={() => {
-                      setLoading(false);
                       setError(false);
                     }}
                     onError={() => {
-                      setLoading(false);
                       setError(true);
                     }}
                   />
@@ -523,16 +544,11 @@ const styles = StyleSheet.create({
     width: SCREEN_WIDTH,
     height: SCREEN_HEIGHT * 0.8,
   },
-  loadingContainer: {
-    ...StyleSheet.absoluteFillObject,
-    justifyContent: 'center',
-    alignItems: 'center',
-    zIndex: 5,
-  },
   errorContainer: {
     ...StyleSheet.absoluteFillObject,
     justifyContent: 'center',
     alignItems: 'center',
+    backgroundColor: '#000',
   },
   errorText: {
     color: '#999',

src/components/common/ImageGrid.tsx

@@ -5,7 +5,7 @@
  * 支持预览图优化
  */
 
-import React, { useMemo, useCallback, useState, useEffect } from 'react';
+import React, { useMemo, useCallback, useState, useEffect, createContext, useContext } from 'react';
 import {
   View,
   StyleSheet,
@@ -15,8 +15,8 @@ import {
   Text,
   Image,
 } from 'react-native';
-import { SmartImage, ImageSource } from './SmartImage';
-import { colors, spacing, borderRadius } from '../../theme';
+import { SmartImage } from './SmartImage';
+import { spacing, borderRadius, fontSizes, useAppColors, type AppColors } from '../../theme';
 import { getPreviewImageUrl, ImageDisplayMode } from '../../utils/imageHelper';
 
 const { width: SCREEN_WIDTH } = Dimensions.get('window');
@@ -40,6 +40,8 @@ export interface ImageGridItem {
   url?: string;
   thumbnailUrl?: string;
   thumbnail_url?: string;
+  preview_url?: string;
+  preview_url_large?: string;
   width?: number;
   height?: number;
 }
@@ -99,6 +101,89 @@ const calculateGridDimensions = (
   };
 };
 
+function createImageGridStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      marginTop: spacing.sm,
+    },
+    fullSize: {
+      flex: 1,
+      width: '100%',
+      height: '100%',
+    },
+    singleContainer: {
+      overflow: 'hidden',
+      backgroundColor: colors.background.disabled,
+    },
+    horizontalContainer: {
+      flexDirection: 'row',
+    },
+    horizontalItem: {
+      overflow: 'hidden',
+      backgroundColor: colors.background.disabled,
+    },
+    gridContainer: {
+      flexDirection: 'row',
+      flexWrap: 'wrap',
+    },
+    gridItem: {
+      overflow: 'hidden',
+      backgroundColor: colors.background.disabled,
+      aspectRatio: 1,
+    },
+    gridItem2: {
+      width: '49%',
+    },
+    gridItem3: {
+      width: '32.5%',
+    },
+    masonryContainer: {
+      flexDirection: 'row',
+    },
+    masonryColumn: {
+      flex: 1,
+    },
+    masonryItem: {
+      overflow: 'hidden',
+      backgroundColor: colors.background.disabled,
+    },
+    moreOverlay: {
+      ...StyleSheet.absoluteFillObject,
+      backgroundColor: 'rgba(0, 0, 0, 0.4)',
+      justifyContent: 'center',
+      alignItems: 'center',
+      borderRadius: borderRadius.md,
+    },
+    moreText: {
+      color: colors.text.inverse,
+      fontSize: fontSizes.xl,
+      fontWeight: '500',
+    },
+    compactContainer: {
+      marginTop: spacing.xs,
+    },
+    compactGrid: {
+      flexDirection: 'row',
+      flexWrap: 'wrap',
+    },
+    compactItem: {
+      overflow: 'hidden',
+      backgroundColor: colors.background.disabled,
+    },
+  });
+}
+
+type ImageGridStyles = ReturnType<typeof createImageGridStyles>;
+const ImageGridStylesContext = createContext<ImageGridStyles | null>(null);
+
+function useImageGridStyles(): ImageGridStyles {
+  const ctx = useContext(ImageGridStylesContext);
+  if (!ctx) {
+    throw new Error('useImageGridStyles must be used within ImageGrid or CompactImageGrid');
+  }
+  return ctx;
+}
+
 // ─── 单张图片子组件 ───────────────────────────────────────────────────────────
 // 独立成组件，方便用 useState 管理异步加载到的实际尺寸
 
@@ -108,6 +193,8 @@ interface SingleImageItemProps {
   maxHeight: number;
   borderRadiusValue: number;
   onPress: () => void;
+  usePreview: boolean;
+  displayMode: ImageDisplayMode;
 }
 
 const SingleImageItem: React.FC<SingleImageItemProps> = ({
@@ -116,15 +203,27 @@ const SingleImageItem: React.FC<SingleImageItemProps> = ({
   maxHeight,
   borderRadiusValue,
   onPress,
+  usePreview,
+  displayMode,
 }) => {
+  const styles = useImageGridStyles();
   const [aspectRatio, setAspectRatio] = useState<number | null>(null);
-  const uri = image.uri || image.url || '';
+  const mainUri = image.uri || image.url || '';
+  const thumbnailUri =
+    image.thumbnail_url ||
+    image.thumbnailUrl ||
+    image.preview_url ||
+    '';
 
   useEffect(() => {
-    if (!uri) return;
+    if (image.width && image.height) {
+      setAspectRatio(image.width / image.height);
+      return;
+    }
+    const probeUri = thumbnailUri || mainUri;
+    if (!probeUri) return;
     let cancelled = false;
 
-    // 添加超时处理，防止高分辨率图片加载卡住
     const timeoutId = setTimeout(() => {
       if (!cancelled && aspectRatio === null) {
         setAspectRatio(SINGLE_IMAGE_DEFAULT_ASPECT_RATIO);
@@ -132,7 +231,7 @@ const SingleImageItem: React.FC<SingleImageItemProps> = ({
     }, 3000);
 
     Image.getSize(
-      uri,
+      probeUri,
       (w, h) => {
         if (!cancelled) {
           clearTimeout(timeoutId);
@@ -150,7 +249,7 @@ const SingleImageItem: React.FC<SingleImageItemProps> = ({
       cancelled = true;
       clearTimeout(timeoutId);
     };
-  }, [uri]);
+  }, [image.width, image.height, thumbnailUri, mainUri]);
 
   const effectiveContainerWidth = containerWidth || SCREEN_WIDTH - DEFAULT_CONTAINER_PADDING;
 
@@ -189,13 +288,19 @@ const SingleImageItem: React.FC<SingleImageItemProps> = ({
     width = Math.min(SINGLE_IMAGE_MIN_HEIGHT * aspectRatio, effectiveContainerWidth);
   }
 
+  const previewForSmart =
+    usePreview && displayMode ? getPreviewImageUrl(image as any, displayMode) : '';
+  const useSmartPreview = !!(usePreview && previewForSmart && mainUri && previewForSmart !== mainUri);
+
   return (
     <Pressable
       onPress={onPress}
       style={[styles.singleContainer, { width, height, borderRadius: borderRadiusValue }]}
     >
       <SmartImage
-        source={{ uri }}
+        source={{ uri: mainUri }}
+        previewUrl={useSmartPreview ? previewForSmart : undefined}
+        usePreview={useSmartPreview}
         style={styles.fullSize}
         resizeMode="cover"
         borderRadius={borderRadiusValue}
@@ -224,7 +329,8 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
   displayMode = 'list',
   usePreview = true,
 }) => {
-  // 通过 onLayout 拿到容器实际宽度
+  const colors = useAppColors();
+  const gridStyles = useMemo(() => createImageGridStyles(colors), [colors]);
   const [containerWidth, setContainerWidth] = useState(0);
 
   // 过滤有效图片 - 支持 uri 或 url 字段
@@ -266,11 +372,6 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
     const image = displayImages[0];
     if (!image) return null;
 
-    // 获取预览图 URL
-    const previewUrl = usePreview && displayMode
-      ? getPreviewImageUrl(image as any, displayMode)
-      : (image.uri || image.url || '');
-    
     return (
       <SingleImageItem
         image={image}
@@ -278,6 +379,8 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
         maxHeight={singleImageMaxHeight}
         borderRadiusValue={borderRadiusValue}
         onPress={() => handleImagePress(0)}
+        usePreview={usePreview}
+        displayMode={displayMode}
       />
     );
   };
@@ -285,7 +388,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
   // 渲染横向双图
   const renderHorizontal = () => {
     return (
-      <View style={[styles.horizontalContainer, { gap }]}>
+      <View style={[gridStyles.horizontalContainer, { gap }]}>
         {displayImages.map((image, index) => {
           const previewUrl = usePreview && displayMode
             ? getPreviewImageUrl(image as any, displayMode)
@@ -296,7 +399,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
               key={image.id || index}
               onPress={() => handleImagePress(index)}
               style={[
-                styles.horizontalItem,
+                gridStyles.horizontalItem,
                 {
                   flex: 1,
                   aspectRatio: 1,
@@ -306,7 +409,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
             >
               <SmartImage
                 source={{ uri: previewUrl }}
-                style={styles.fullSize}
+                style={gridStyles.fullSize}
                 resizeMode="cover"
                 borderRadius={borderRadiusValue}
               />
@@ -320,7 +423,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
   // 渲染网格布局
   const renderGrid = () => {
     return (
-      <View style={[styles.gridContainer, { gap }]}>
+      <View style={[gridStyles.gridContainer, { gap }]}>
         {displayImages.map((image, index) => {
           const isLastVisible = index === displayImages.length - 1;
           const showOverlay = isLastVisible && remainingCount > 0 && showMoreOverlay;
@@ -334,8 +437,8 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
               key={image.id || index}
               onPress={() => handleImagePress(index)}
               style={[
-                styles.gridItem,
-                gridColumns === 3 ? styles.gridItem3 : styles.gridItem2,
+                gridStyles.gridItem,
+                gridColumns === 3 ? gridStyles.gridItem3 : gridStyles.gridItem2,
                 {
                   borderRadius: borderRadiusValue,
                 },
@@ -343,13 +446,13 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
             >
               <SmartImage
                 source={{ uri: previewUrl }}
-                style={styles.fullSize}
+                style={gridStyles.fullSize}
                 resizeMode="cover"
                 borderRadius={borderRadiusValue}
               />
               {showOverlay && (
-                <View style={styles.moreOverlay}>
-                  <Text style={styles.moreText}>+{remainingCount}</Text>
+                <View style={gridStyles.moreOverlay}>
+                  <Text style={gridStyles.moreText}>+{remainingCount}</Text>
                 </View>
               )}
             </Pressable>
@@ -379,7 +482,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
 
     const renderColumn = (columnImages: ImageGridItem[], columnIndex: number) => {
       return (
-        <View style={[styles.masonryColumn, { gap }]}>
+        <View style={[gridStyles.masonryColumn, { gap }]}>
           {columnImages.map((image, index) => {
             const actualIndex = columnIndex + index * 2;
             const aspectRatio = image.width && image.height
@@ -396,7 +499,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
                 key={image.id || actualIndex}
                 onPress={() => handleImagePress(actualIndex)}
                 style={[
-                  styles.masonryItem,
+                  gridStyles.masonryItem,
                   {
                     width: itemWidth,
                     height: Math.max(height, itemWidth * 0.7),
@@ -406,7 +509,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
               >
                 <SmartImage
                   source={{ uri: previewUrl }}
-                  style={styles.fullSize}
+                  style={gridStyles.fullSize}
                   resizeMode="cover"
                   borderRadius={borderRadiusValue}
                 />
@@ -418,7 +521,7 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
     };
 
     return (
-      <View style={[styles.masonryContainer, { gap }]}>
+      <View style={[gridStyles.masonryContainer, { gap }]}>
         {renderColumn(leftColumn, 0)}
         {renderColumn(rightColumn, 1)}
       </View>
@@ -446,13 +549,15 @@ export const ImageGrid: React.FC<ImageGridProps> = ({
   }
 
   return (
-    <View
-      style={[styles.container, style]}
-      testID={testID}
-      onLayout={e => setContainerWidth(e.nativeEvent.layout.width)}
-    >
-      {renderContent()}
-    </View>
+    <ImageGridStylesContext.Provider value={gridStyles}>
+      <View
+        style={[gridStyles.container, style]}
+        testID={testID}
+        onLayout={e => setContainerWidth(e.nativeEvent.layout.width)}
+      >
+        {renderContent()}
+      </View>
+    </ImageGridStylesContext.Provider>
   );
 };
 
@@ -472,6 +577,8 @@ export const CompactImageGrid: React.FC<CompactImageGridProps> = ({
   borderRadius: borderRadiusValue = borderRadius.sm,
   ...props
 }) => {
+  const colors = useAppColors();
+  const gridStyles = useMemo(() => createImageGridStyles(colors), [colors]);
   const containerWidth = maxWidth || SCREEN_WIDTH - DEFAULT_CONTAINER_PADDING - 36 - spacing.sm; // 36是头像宽度
 
   const renderCompactGrid = () => {
@@ -488,7 +595,7 @@ export const CompactImageGrid: React.FC<CompactImageGridProps> = ({
         <Pressable
           onPress={() => props.onImagePress?.(images, 0)}
           style={[
-            styles.compactItem,
+            gridStyles.compactItem,
             {
               width: size,
               height: size,
@@ -498,7 +605,7 @@ export const CompactImageGrid: React.FC<CompactImageGridProps> = ({
         >
           <SmartImage
             source={{ uri: image.uri || image.url, width: image.width, height: image.height }}
-            style={styles.fullSize}
+            style={gridStyles.fullSize}
             resizeMode="cover"
             borderRadius={borderRadiusValue}
           />
@@ -511,13 +618,13 @@ export const CompactImageGrid: React.FC<CompactImageGridProps> = ({
     const { itemSize } = calculateGridDimensions(count, containerWidth, gap, columns);
 
     return (
-      <View style={[styles.compactGrid, { gap }]}>
+      <View style={[gridStyles.compactGrid, { gap }]}>
         {images.slice(0, 6).map((image, index) => (
           <Pressable
             key={image.id || index}
             onPress={() => props.onImagePress?.(images, index)}
             style={[
-              styles.compactItem,
+              gridStyles.compactItem,
               {
                 width: itemSize,
                 height: itemSize,
@@ -527,13 +634,13 @@ export const CompactImageGrid: React.FC<CompactImageGridProps> = ({
           >
             <SmartImage
               source={{ uri: image.uri || image.url, width: image.width, height: image.height }}
-              style={styles.fullSize}
+              style={gridStyles.fullSize}
               resizeMode="cover"
               borderRadius={borderRadiusValue}
             />
             {index === 5 && images.length > 6 && (
-              <View style={styles.moreOverlay}>
-                <Text style={styles.moreText}>+{images.length - 6}</Text>
+              <View style={gridStyles.moreOverlay}>
+                <Text style={gridStyles.moreText}>+{images.length - 6}</Text>
               </View>
             )}
           </Pressable>
@@ -542,86 +649,11 @@ export const CompactImageGrid: React.FC<CompactImageGridProps> = ({
     );
   };
 
-  return <View style={styles.compactContainer}>{renderCompactGrid()}</View>;
+  return (
+    <ImageGridStylesContext.Provider value={gridStyles}>
+      <View style={gridStyles.compactContainer}>{renderCompactGrid()}</View>
+    </ImageGridStylesContext.Provider>
+  );
 };
 
-const styles = StyleSheet.create({
-  container: {
-    marginTop: spacing.sm,
-  },
-  fullSize: {
-    flex: 1,
-    width: '100%',
-    height: '100%',
-  },
-  // 单图样式
-  singleContainer: {
-    overflow: 'hidden',
-    backgroundColor: colors.background.disabled,
-  },
-  // 横向布局样式
-  horizontalContainer: {
-    flexDirection: 'row',
-  },
-  horizontalItem: {
-    overflow: 'hidden',
-    backgroundColor: colors.background.disabled,
-  },
-  // 网格布局样式
-  gridContainer: {
-    flexDirection: 'row',
-    flexWrap: 'wrap',
-  },
-  gridItem: {
-    overflow: 'hidden',
-    backgroundColor: colors.background.disabled,
-    aspectRatio: 1,
-  },
-  gridItem2: {
-    width: '48%', // 2列布局，每列约48%宽度，留有余量避免换行
-  },
-  gridItem3: {
-    width: '31%', // 3列布局，每列约31%宽度，留有余量避免换行
-  },
-  // 瀑布流样式
-  masonryContainer: {
-    flexDirection: 'row',
-  },
-  masonryColumn: {
-    flex: 1,
-  },
-  masonryItem: {
-    overflow: 'hidden',
-    backgroundColor: colors.background.disabled,
-  },
-  // 更多遮罩 - 类似微博的灰色蒙版
-  moreOverlay: {
-    ...StyleSheet.absoluteFillObject,
-    backgroundColor: 'rgba(0, 0, 0, 0.4)',
-    justifyContent: 'center',
-    alignItems: 'center',
-    borderRadius: borderRadius.md,
-  },
-  moreText: {
-    color: colors.text.inverse,
-    fontSize: fontSizes.xl,
-    fontWeight: '500',
-  },
-  // 紧凑模式样式
-  compactContainer: {
-    marginTop: spacing.xs,
-  },
-  compactGrid: {
-    flexDirection: 'row',
-    flexWrap: 'wrap',
-  },
-  compactItem: {
-    overflow: 'hidden',
-    backgroundColor: colors.background.disabled,
-  },
-});
-
-// 导入字体大小
-import { fontSizes } from '../../theme';
-
 export default ImageGrid;

src/components/common/Input.tsx

@@ -3,7 +3,7 @@
  * 支持标签、错误提示、图标、多行输入等
  */
 
-import React, { useState } from 'react';
+import React, { useMemo, useState } from 'react';
 import {
   View,
   TextInput,
@@ -13,7 +13,7 @@ import {
   TextStyle,
 } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, borderRadius, spacing, fontSizes } from '../../theme';
+import { borderRadius, spacing, fontSizes, useAppColors, type AppColors } from '../../theme';
 import Text from './Text';
 
 interface InputProps {
@@ -36,6 +36,46 @@ interface InputProps {
   autoCorrect?: boolean;
 }
 
+function createInputStyles(colors: AppColors) {
+  return StyleSheet.create({
+    wrapper: {
+      width: '100%',
+    },
+    label: {
+      marginBottom: spacing.xs,
+    },
+    container: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      backgroundColor: colors.background.paper,
+      borderWidth: 1,
+      borderRadius: borderRadius.md,
+      paddingHorizontal: spacing.md,
+      borderColor: colors.divider,
+    },
+    input: {
+      flex: 1,
+      fontSize: fontSizes.md,
+      color: colors.text.primary,
+      paddingVertical: spacing.md,
+      minHeight: 44,
+    },
+    multilineInput: {
+      textAlignVertical: 'top',
+      minHeight: 100,
+    },
+    leftIcon: {
+      marginRight: spacing.sm,
+    },
+    rightIcon: {
+      marginLeft: spacing.sm,
+    },
+    error: {
+      marginTop: spacing.xs,
+    },
+  });
+}
+
 const Input: React.FC<InputProps> = ({
   value,
   onChangeText,
@@ -55,6 +95,8 @@ const Input: React.FC<InputProps> = ({
   keyboardType = 'default',
   autoCorrect = true,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createInputStyles(colors), [colors]);
   const [isFocused, setIsFocused] = useState(false);
 
   const getBorderColor = () => {
@@ -87,11 +129,7 @@ const Input: React.FC<InputProps> = ({
           />
         )}
         <TextInput
-          style={[
-            styles.input,
-            multiline && styles.multilineInput,
-            inputStyle,
-          ]}
+          style={[styles.input, multiline && styles.multilineInput, inputStyle]}
           value={value}
           onChangeText={onChangeText}
           placeholder={placeholder}
@@ -105,15 +143,11 @@ const Input: React.FC<InputProps> = ({
           autoCapitalize={autoCapitalize}
           keyboardType={keyboardType}
           autoCorrect={autoCorrect}
-          // 确保光标可见
           cursorColor={colors.primary.main}
           selectionColor={`${colors.primary.main}40`}
         />
         {rightIcon && (
-          <TouchableOpacity
-            onPress={onRightIconPress}
-            disabled={!onRightIconPress}
-          >
+          <TouchableOpacity onPress={onRightIconPress} disabled={!onRightIconPress}>
             <MaterialCommunityIcons
               name={rightIcon as any}
               size={20}
@@ -132,43 +166,4 @@ const Input: React.FC<InputProps> = ({
   );
 };
 
-const styles = StyleSheet.create({
-  wrapper: {
-    width: '100%',
-  },
-  label: {
-    marginBottom: spacing.xs,
-  },
-  container: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    backgroundColor: colors.background.paper,
-    borderWidth: 1,
-    borderRadius: borderRadius.md,
-    paddingHorizontal: spacing.md,
-    // 减少非焦点状态的边框明显度
-    borderColor: colors.divider,
-  },
-  input: {
-    flex: 1,
-    fontSize: fontSizes.md,
-    color: colors.text.primary,
-    paddingVertical: spacing.md,
-    minHeight: 44,
-  },
-  multilineInput: {
-    textAlignVertical: 'top',
-    minHeight: 100,
-  },
-  leftIcon: {
-    marginRight: spacing.sm,
-  },
-  rightIcon: {
-    marginLeft: spacing.sm,
-  },
-  error: {
-    marginTop: spacing.xs,
-  },
-});
-
 export default Input;

src/components/common/Loading.tsx

@@ -3,9 +3,9 @@
  * 支持不同尺寸、全屏模式
  */
 
-import React from 'react';
+import React, { useMemo } from 'react';
 import { View, ActivityIndicator, StyleSheet, ViewStyle } from 'react-native';
-import { colors } from '../../theme';
+import { useAppColors, type AppColors } from '../../theme';
 
 type LoadingSize = 'sm' | 'md' | 'lg';
 
@@ -16,12 +16,32 @@ interface LoadingProps {
   style?: ViewStyle;
 }
 
+function createLoadingStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      padding: 20,
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+    fullScreen: {
+      flex: 1,
+      alignItems: 'center',
+      justifyContent: 'center',
+      backgroundColor: colors.background.default,
+    },
+  });
+}
+
 const Loading: React.FC<LoadingProps> = ({
   size = 'md',
-  color = colors.primary.main,
+  color,
   fullScreen = false,
   style,
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createLoadingStyles(colors), [colors]);
+  const indicatorColor = color ?? colors.primary.main;
+
   const getSize = (): 'small' | 'large' | undefined => {
     switch (size) {
       case 'sm':
@@ -36,30 +56,16 @@ const Loading: React.FC<LoadingProps> = ({
   if (fullScreen) {
     return (
       <View style={[styles.fullScreen, style]}>
-        <ActivityIndicator size={getSize()} color={color} />
+        <ActivityIndicator size={getSize()} color={indicatorColor} />
       </View>
     );
   }
 
   return (
     <View style={[styles.container, style]}>
-      <ActivityIndicator size={getSize()} color={color} />
+      <ActivityIndicator size={getSize()} color={indicatorColor} />
     </View>
   );
 };
 
-const styles = StyleSheet.create({
-  container: {
-    padding: 20,
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  fullScreen: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    backgroundColor: colors.background.default,
-  },
-});
-
 export default Loading;

src/components/common/SearchBar.tsx

@@ -0,0 +1,137 @@
+/**
+ * SearchBar 搜索栏组件
+ * 用于搜索内容
+ */
+
+import React, { useMemo, useState } from 'react';
+import { View, TextInput, TouchableOpacity, StyleSheet } from 'react-native';
+import { MaterialCommunityIcons } from '@expo/vector-icons';
+import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
+
+interface SearchBarProps {
+  value: string;
+  onChangeText: (text: string) => void;
+  onSubmit: () => void;
+  placeholder?: string;
+  onFocus?: () => void;
+  onBlur?: () => void;
+  autoFocus?: boolean;
+}
+
+function createSearchBarStyles(colors: AppColors) {
+  return StyleSheet.create({
+    container: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.full,
+      paddingHorizontal: spacing.xs,
+      height: 46,
+      borderWidth: 1,
+      borderColor: colors.divider,
+      shadowColor: 'transparent',
+      shadowOffset: { width: 0, height: 0 },
+      shadowOpacity: 0,
+      shadowRadius: 0,
+      elevation: 0,
+    },
+    containerFocused: {
+      borderColor: colors.primary.main,
+      shadowColor: 'transparent',
+      shadowOffset: { width: 0, height: 0 },
+      shadowOpacity: 0,
+      shadowRadius: 0,
+      elevation: 0,
+    },
+    searchIconWrap: {
+      width: 30,
+      height: 30,
+      marginLeft: spacing.xs,
+      marginRight: spacing.xs,
+      borderRadius: borderRadius.full,
+      backgroundColor: `${colors.text.secondary}12`,
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+    searchIconWrapFocused: {
+      backgroundColor: `${colors.primary.main}1A`,
+    },
+    input: {
+      flex: 1,
+      fontSize: fontSizes.md,
+      color: colors.text.primary,
+      paddingVertical: spacing.sm + 1,
+      paddingHorizontal: spacing.xs,
+    },
+    clearButton: {
+      width: 24,
+      height: 24,
+      marginHorizontal: spacing.xs,
+      borderRadius: borderRadius.full,
+      backgroundColor: `${colors.text.secondary}14`,
+      alignItems: 'center',
+      justifyContent: 'center',
+    },
+  });
+}
+
+const SearchBar: React.FC<SearchBarProps> = ({
+  value,
+  onChangeText,
+  onSubmit,
+  placeholder = '搜索...',
+  onFocus,
+  onBlur,
+  autoFocus = false,
+}) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createSearchBarStyles(colors), [colors]);
+  const [isFocused, setIsFocused] = useState(false);
+
+  const handleFocus = () => {
+    setIsFocused(true);
+    onFocus?.();
+  };
+
+  const handleBlur = () => {
+    setIsFocused(false);
+    onBlur?.();
+  };
+
+  return (
+    <View style={[styles.container, isFocused && styles.containerFocused]}>
+      <View style={[styles.searchIconWrap, isFocused && styles.searchIconWrapFocused]}>
+        <MaterialCommunityIcons
+          name="magnify"
+          size={18}
+          color={isFocused ? colors.primary.main : colors.text.secondary}
+        />
+      </View>
+      <TextInput
+        style={styles.input}
+        value={value}
+        onChangeText={onChangeText}
+        placeholder={placeholder}
+        placeholderTextColor={colors.text.hint}
+        returnKeyType="search"
+        onSubmitEditing={onSubmit}
+        onFocus={handleFocus}
+        onBlur={handleBlur}
+        autoFocus={autoFocus}
+        cursorColor={colors.primary.main}
+        selectionColor={`${colors.primary.main}40`}
+      />
+      {value.length > 0 && (
+        <TouchableOpacity
+          onPress={() => onChangeText('')}
+          style={styles.clearButton}
+          activeOpacity={0.7}
+        >
+          <MaterialCommunityIcons name="close" size={14} color={colors.text.secondary} />
+        </TouchableOpacity>
+      )}
+    </View>
+  );
+};
+
+export default SearchBar;

src/components/common/SmartImage.tsx

@@ -4,7 +4,7 @@
  * 基于 expo-image 封装，原生支持 GIF/WebP 动图
  */
 
-import React, { useState, useCallback, useRef, useEffect } from 'react';
+import React, { useState, useCallback, useRef, useEffect, useMemo } from 'react';
 import {
   View,
   StyleSheet,
@@ -13,10 +13,40 @@ import {
   ActivityIndicator,
   Pressable,
   StyleProp,
+  Platform,
 } from 'react-native';
 import { Image as ExpoImage } from 'expo-image';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { colors, borderRadius } from '../../theme';
+import { borderRadius, useAppColors, type AppColors } from '../../theme';
+
+function createSmartImageStyles(colors: AppColors) {
+  return StyleSheet.create({
+    image: {
+      flex: 1,
+      width: '100%',
+      height: '100%',
+    },
+    variantImage: {
+      flex: 1,
+    },
+    overlay: {
+      ...StyleSheet.absoluteFillObject,
+      justifyContent: 'center',
+      alignItems: 'center',
+      backgroundColor: colors.background.disabled,
+    },
+    loadingContainer: {
+      padding: 8,
+      borderRadius: borderRadius.md,
+      backgroundColor: `${colors.background.paper}E6`,
+    },
+    errorContainer: {
+      padding: 12,
+      borderRadius: borderRadius.md,
+      backgroundColor: `${colors.text.primary}0D`,
+    },
+  });
+}
 
 // 图片加载状态
 export type ImageLoadState = 'loading' | 'success' | 'error';
@@ -61,6 +91,8 @@ export interface SmartImageProps {
   usePreview?: boolean;
   /** 是否懒加载 */
   lazyLoad?: boolean;
+  /** Web 端 IntersectionObserver rootMargin，略提前加载进入视口附近的图 */
+  lazyRootMargin?: string;
   /** 缓存策略 */
   cachePolicy?: 'memory' | 'disk' | 'memory-disk' | 'none';
 }
@@ -85,11 +117,15 @@ export const SmartImage: React.FC<SmartImageProps> = ({
   previewUrl,
   usePreview = false,
   lazyLoad = false,
+  lazyRootMargin = '160px',
   cachePolicy = 'memory-disk',
 }) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createSmartImageStyles(colors), [colors]);
   const [loadState, setLoadState] = useState<ImageLoadState>('loading');
-  const [isVisible, setIsVisible] = useState(!lazyLoad);
+  const [isVisible, setIsVisible] = useState(() => !lazyLoad || Platform.OS !== 'web');
   const [shouldLoadOriginal, setShouldLoadOriginal] = useState(false);
+  const lazyTargetRef = useRef<View>(null);
 
   // 解析图片源 - 支持 uri 或 url 字段
   const imageUri = typeof source === 'string'
@@ -99,6 +135,39 @@ export const SmartImage: React.FC<SmartImageProps> = ({
   // 解析预览图 URL
   const previewUri = typeof previewUrl === 'string' ? previewUrl : '';
 
+  useEffect(() => {
+    setShouldLoadOriginal(false);
+    setLoadState('loading');
+  }, [imageUri]);
+
+  useEffect(() => {
+    if (!lazyLoad) {
+      setIsVisible(true);
+      return;
+    }
+    if (Platform.OS !== 'web') {
+      setIsVisible(true);
+      return;
+    }
+    setIsVisible(false);
+    const node = lazyTargetRef.current as unknown as Element | null;
+    if (!node || typeof IntersectionObserver === 'undefined') {
+      setIsVisible(true);
+      return;
+    }
+    const observer = new IntersectionObserver(
+      entries => {
+        if (entries.some(e => e.isIntersecting)) {
+          setIsVisible(true);
+          observer.disconnect();
+        }
+      },
+      { rootMargin: lazyRootMargin }
+    );
+    observer.observe(node);
+    return () => observer.disconnect();
+  }, [lazyLoad, lazyRootMargin, imageUri]);
+
   // 智能选择图片 URL
   const getImageUrl = useCallback((): string => {
     // 如果应该加载原图（预览图已加载完成或没有预览图）
@@ -200,11 +269,13 @@ export const SmartImage: React.FC<SmartImageProps> = ({
     );
   }
 
-  // 如果是懒加载且不可见，显示占位
+  // 如果是懒加载且不可见，显示占位（Web 上由 IntersectionObserver 驱动进入视口后再加载）
   if (lazyLoad && !isVisible) {
     return (
       <View
-        style={[containerStyle, style as ViewStyle, { backgroundColor: '#F5F5F5' }]}
+        ref={Platform.OS === 'web' ? lazyTargetRef : undefined}
+        collapsable={false}
+        style={[containerStyle, style as ViewStyle, { backgroundColor: colors.background.default }]}
         testID={testID}
       />
     );
@@ -288,36 +359,15 @@ export const VariantImage: React.FC<ImageVariantProps> = ({
     <SmartImage
       {...props}
       style={finalStyle}
-      imageStyle={[styles.variantImage, imageStyle]}
+      imageStyle={[variantStyles.variantImage, imageStyle]}
     />
   );
 };
 
-const styles = StyleSheet.create({
-  image: {
-    flex: 1,
-    width: '100%',
-    height: '100%',
-  },
+const variantStyles = StyleSheet.create({
   variantImage: {
     flex: 1,
   },
-  overlay: {
-    ...StyleSheet.absoluteFillObject,
-    justifyContent: 'center',
-    alignItems: 'center',
-    backgroundColor: colors.background.disabled,
-  },
-  loadingContainer: {
-    padding: 8,
-    borderRadius: borderRadius.md,
-    backgroundColor: 'rgba(255, 255, 255, 0.9)',
-  },
-  errorContainer: {
-    padding: 12,
-    borderRadius: borderRadius.md,
-    backgroundColor: 'rgba(0, 0, 0, 0.05)',
-  },
 });
 
 export default SmartImage;

src/components/common/Text.tsx

@@ -5,7 +5,7 @@
 
 import React from 'react';
 import { Text as RNText, TextProps, StyleSheet, TextStyle, ViewStyle } from 'react-native';
-import { colors, fontSizes } from '../../theme';
+import { useAppColors, fontSizes } from '../../theme';
 
 type TextVariant = 'h1' | 'h2' | 'h3' | 'body' | 'caption' | 'label';
 
@@ -60,6 +60,7 @@ const Text: React.FC<CustomTextProps> = ({
   style,
   ...props
 }) => {
+  const colors = useAppColors();
   const textStyle = [
     styles.base,
     variantStyles[variant],

src/components/common/index.ts

@@ -16,6 +16,7 @@ export { default as ResponsiveContainer } from './ResponsiveContainer';
 export { default as ResponsiveGrid } from './ResponsiveGrid';
 export { default as ResponsiveStack, HStack, VStack } from './ResponsiveStack';
 export { default as AdaptiveLayout, SidebarLayout } from './AdaptiveLayout';
+export { default as AppBackButton } from './AppBackButton';
 
 // 图片相关组件
 export { default as SmartImage } from './SmartImage';

src/core/entities/Message.ts

@@ -0,0 +1,144 @@
+/**
+ * Message Entity - 消息领域实体
+ * 定义消息的核心属性和行为，不依赖任何外部框架
+ */
+
+export interface MessageSegment {
+  type: 'text' | 'image' | 'mention' | 'reply' | string;
+  data: Record<string, any>;
+}
+
+export interface Message {
+  id: string;
+  conversationId: string;
+  senderId: string;
+  seq: number;
+  segments: MessageSegment[];
+  createdAt: string;
+  status: 'normal' | 'recalled' | 'deleted';
+  category?: string;
+  sender?: {
+    id: string;
+    username: string;
+    avatar?: string;
+    nickname?: string;
+  };
+}
+
+export interface Conversation {
+  id: string;
+  type: 'private' | 'group';
+  isPinned: boolean;
+  lastSeq: number;
+  lastMessage?: Message;
+  lastMessageAt: string;
+  unreadCount: number;
+  participants: Array<{
+    id: string;
+    username: string;
+    avatar?: string;
+    nickname?: string;
+  }>;
+  group?: {
+    id: string;
+    name: string;
+    avatar?: string;
+  };
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface UnreadCount {
+  total: number;
+  system: number;
+}
+
+export interface TypingStatus {
+  groupId: string;
+  userId: string;
+  isTyping: boolean;
+}
+
+export interface GroupNotice {
+  type: 'member_join' | 'member_leave' | 'member_removed' | 'role_changed' | 'muted' | 'unmuted';
+  groupId: string;
+  data: {
+    userId?: string;
+    operatorId?: string;
+    role?: string;
+    username?: string;
+    [key: string]: any;
+  };
+  timestamp: number;
+  messageId?: string;
+  seq?: number;
+}
+
+// 工厂函数
+export const createMessage = (data: Partial<Message>): Message => ({
+  id: data.id || '',
+  conversationId: data.conversationId || '',
+  senderId: data.senderId || '',
+  seq: data.seq || 0,
+  segments: data.segments || [],
+  createdAt: data.createdAt || new Date().toISOString(),
+  status: data.status || 'normal',
+  category: data.category,
+  sender: data.sender,
+});
+
+export const createConversation = (data: Partial<Conversation>): Conversation => ({
+  id: data.id || '',
+  type: data.type || 'private',
+  isPinned: data.isPinned || false,
+  lastSeq: data.lastSeq || 0,
+  lastMessage: data.lastMessage,
+  lastMessageAt: data.lastMessageAt || new Date().toISOString(),
+  unreadCount: data.unreadCount || 0,
+  participants: data.participants || [],
+  group: data.group,
+  createdAt: data.createdAt || new Date().toISOString(),
+  updatedAt: data.updatedAt || new Date().toISOString(),
+});
+
+// 工具函数
+export const isMessageFromCurrentUser = (message: Message, currentUserId: string): boolean => {
+  return message.senderId === currentUserId;
+};
+
+export const shouldIncrementUnread = (
+  message: Message,
+  currentUserId: string,
+  activeConversationId: string | null
+): boolean => {
+  return (
+    message.senderId !== currentUserId &&
+    message.conversationId !== activeConversationId &&
+    !!currentUserId
+  );
+};
+
+export const buildTextContent = (segments: MessageSegment[]): string => {
+  return segments
+    .filter((s) => s.type === 'text')
+    .map((s) => s.data?.text || '')
+    .join('');
+};
+
+export const buildGroupNoticeText = (notice: GroupNotice): string => {
+  const username = notice.data?.username || '用户';
+  switch (notice.type) {
+    case 'member_join':
+      return `"${username}" 加入了群聊`;
+    case 'member_leave':
+      return `"${username}" 退出了群聊`;
+    case 'member_removed':
+      return `"${username}" 被移出群聊`;
+    case 'muted':
+      return `"${username}" 已被管理员禁言`;
+    case 'unmuted':
+      return `"${username}" 已被管理员解除禁言`;
+    default:
+      return '';
+  }
+};

src/core/entities/Post.ts

@@ -0,0 +1,290 @@
+/**
+ * Post Entity - 帖子领域实体
+ * 定义帖子的核心属性和行为，不依赖任何外部框架
+ */
+
+// ==================== 帖子状态枚举 ====================
+
+export type PostStatus = 'published' | 'draft' | 'deleted';
+
+// ==================== 值对象 ====================
+
+/**
+ * 帖子作者信息
+ */
+export interface PostAuthor {
+  id: string;
+  username: string;
+  nickname?: string;
+  avatar?: string;
+  is_following?: boolean;
+  is_following_me?: boolean;
+}
+
+/**
+ * 帖子图片信息
+ */
+export interface PostImage {
+  url: string;
+  width?: number;
+  height?: number;
+  thumbnailUrl?: string;
+}
+
+/**
+ * 帖子标签
+ */
+export interface PostTag {
+  id: string;
+  name: string;
+}
+
+// ==================== 主实体 ====================
+
+/**
+ * 帖子实体
+ */
+export interface Post {
+  /** 帖子唯一标识 */
+  id: string;
+  /** 作者ID */
+  authorId: string;
+  /** 作者信息 */
+  author?: PostAuthor;
+  /** 帖子标题 */
+  title: string;
+  /** 帖子内容 */
+  content: string;
+  /** 图片列表 */
+  images: PostImage[];
+  /** 点赞数 (camelCase) */
+  likesCount: number;
+  /** 评论数 (camelCase) */
+  commentsCount: number;
+  /** 分享数 (camelCase) */
+  sharesCount: number;
+  /** 浏览数 (camelCase) */
+  viewsCount: number;
+  /** 收藏数 (camelCase) */
+  favoritesCount: number;
+  /** 当前用户是否已点赞 (camelCase) */
+  isLiked: boolean;
+  /** 当前用户是否已收藏 (camelCase) */
+  isFavorited: boolean;
+  /** 是否置顶 (camelCase) */
+  isPinned: boolean;
+  /** 帖子状态 */
+  status: PostStatus;
+  /** 所属频道ID */
+  channelId?: string;
+  /** 频道摘要（列表 API 填充，供 PostCard 等展示） */
+  channel?: { id: string; name: string } | null;
+  /** 标签列表 */
+  tags: string[];
+  /** 创建时间 */
+  createdAt: string;
+  /** 更新时间 */
+  updatedAt: string;
+  /** 用户编辑内容的时间（与统计类更新解耦） */
+  contentEditedAt?: string;
+
+  // ==================== 向后兼容字段 (snake_case) ====================
+  // 这些字段用于与旧代码兼容，新代码应使用 camelCase 版本
+  
+  /** @deprecated 请使用 likesCount */
+  likes_count?: number;
+  /** @deprecated 请使用 commentsCount */
+  comments_count?: number;
+  /** @deprecated 请使用 favoritesCount */
+  favorites_count?: number;
+  /** @deprecated 请使用 sharesCount */
+  shares_count?: number;
+  /** @deprecated 请使用 viewsCount */
+  views_count?: number;
+  /** @deprecated 请使用 isLiked */
+  is_liked?: boolean;
+  /** @deprecated 请使用 isFavorited */
+  is_favorited?: boolean;
+  /** @deprecated 请使用 isPinned */
+  is_pinned?: boolean;
+  /** @deprecated 请使用 authorId */
+  user_id?: string;
+  /** @deprecated 请使用 createdAt */
+  created_at?: string;
+  /** @deprecated 请使用 updatedAt */
+  updated_at?: string;
+  /** @deprecated 请使用 contentEditedAt */
+  content_edited_at?: string;
+  /** @deprecated 请使用 channelId */
+  channel_id?: string;
+  /** @deprecated 请使用 status */
+  status_str?: string;
+  /** 投票帖子标识 (部分旧代码使用) */
+  is_vote?: boolean;
+  /** 锁定状态 (部分旧代码使用) */
+  is_locked?: boolean;
+  /** 置顶评论 (部分旧代码使用) */
+  top_comment?: any;
+}
+
+// ==================== 工厂函数 ====================
+
+/**
+ * 创建帖子作者信息
+ */
+export const createPostAuthor = (data: Partial<PostAuthor>): PostAuthor => ({
+  id: data.id || '',
+  username: data.username || '',
+  nickname: data.nickname,
+  avatar: data.avatar,
+  is_following: data.is_following,
+  is_following_me: data.is_following_me,
+});
+
+/**
+ * 创建帖子图片信息
+ */
+export const createPostImage = (data: Partial<PostImage>): PostImage => ({
+  url: data.url || '',
+  width: data.width,
+  height: data.height,
+  thumbnailUrl: data.thumbnailUrl,
+});
+
+/**
+ * 创建帖子实体
+ */
+export const createPost = (data: Partial<Post>): Post => ({
+  id: data.id || '',
+  authorId: data.authorId || '',
+  author: data.author,
+  title: data.title || '',
+  content: data.content || '',
+  images: data.images || [],
+  likesCount: data.likesCount || 0,
+  commentsCount: data.commentsCount || 0,
+  sharesCount: data.sharesCount || 0,
+  viewsCount: data.viewsCount || 0,
+  favoritesCount: data.favoritesCount || 0,
+  isLiked: data.isLiked || false,
+  isFavorited: data.isFavorited || false,
+  isPinned: data.isPinned || false,
+  status: data.status || 'published',
+  channelId: data.channelId,
+  tags: data.tags || [],
+  createdAt: data.createdAt || new Date().toISOString(),
+  updatedAt: data.updatedAt || new Date().toISOString(),
+});
+
+// ==================== 类型守卫 ====================
+
+/**
+ * 检查是否为有效的帖子状态
+ */
+export const isValidPostStatus = (status: string): status is PostStatus => {
+  return ['published', 'draft', 'deleted'].includes(status);
+};
+
+/**
+ * 检查帖子是否已发布
+ */
+export const isPostPublished = (post: Post): boolean => {
+  return post.status === 'published';
+};
+
+/**
+ * 检查帖子是否已删除
+ */
+export const isPostDeleted = (post: Post): boolean => {
+  return post.status === 'deleted';
+};
+
+/**
+ * 检查帖子是否为草稿
+ */
+export const isPostDraft = (post: Post): boolean => {
+  return post.status === 'draft';
+};
+
+// ==================== 辅助函数 ====================
+
+/**
+ * 检查当前用户是否为帖子作者
+ */
+export const isPostAuthor = (post: Post, userId: string): boolean => {
+  return post.authorId === userId;
+};
+
+/**
+ * 获取帖子的主要图片（第一张图片）
+ */
+export const getPostThumbnail = (post: Post): PostImage | undefined => {
+  return post.images[0];
+};
+
+/**
+ * 检查帖子是否包含图片
+ */
+export const hasPostImages = (post: Post): boolean => {
+  return post.images.length > 0;
+};
+
+/**
+ * 获取帖子的显示标题（优先使用标题，否则使用内容摘要）
+ */
+export const getPostDisplayTitle = (post: Post, maxLength: number = 50): string => {
+  if (post.title) {
+    return post.title;
+  }
+  if (post.content.length > maxLength) {
+    return post.content.substring(0, maxLength) + '...';
+  }
+  return post.content;
+};
+
+/**
+ * 计算帖子的互动总数
+ */
+export const getPostTotalEngagement = (post: Post): number => {
+  return post.likesCount + post.commentsCount + post.sharesCount + post.favoritesCount;
+};
+
+/**
+ * 根据创建时间 ISO 字符串格式化为列表用相对时间（与历史 formatPostTime 行为一致）
+ */
+export const formatPostCreatedAtString = (createdAt: string | undefined | null): string => {
+  if (!createdAt) return '';
+  const createdAtDate = new Date(createdAt);
+  if (Number.isNaN(createdAtDate.getTime())) return '';
+
+  const now = new Date();
+  const diffMs = now.getTime() - createdAtDate.getTime();
+  if (diffMs < 0) {
+    return createdAtDate.toLocaleDateString('zh-CN');
+  }
+  const diffSeconds = Math.floor(diffMs / 1000);
+  const diffMinutes = Math.floor(diffSeconds / 60);
+  const diffHours = Math.floor(diffMinutes / 60);
+  const diffDays = Math.floor(diffHours / 24);
+
+  if (diffSeconds < 60) {
+    return '刚刚';
+  }
+  if (diffMinutes < 60) {
+    return `${diffMinutes}分钟前`;
+  }
+  if (diffHours < 24) {
+    return `${diffHours}小时前`;
+  }
+  if (diffDays < 7) {
+    return `${diffDays}天前`;
+  }
+  return createdAtDate.toLocaleDateString('zh-CN');
+};
+
+/**
+ * 格式化帖子创建时间为相对时间描述
+ */
+export const formatPostTime = (post: Post): string => {
+  return formatPostCreatedAtString(post.createdAt);
+};

src/core/usecases/ProcessMessageUseCase.ts

@@ -0,0 +1,656 @@
+/**
+ * ProcessMessageUseCase - 处理消息用例
+ * 处理消息的业务逻辑，协调 Repository 和 SSEClient
+ * 纯业务逻辑，无UI依赖
+ */
+
+import { messageRepository } from '../../data/repositories/MessageRepository';
+import { sseClient, SSEEventType } from '../../data/datasources/SSEClient';
+import {
+  Message,
+  Conversation,
+  GroupNotice,
+  createMessage,
+  isMessageFromCurrentUser,
+  shouldIncrementUnread,
+  buildGroupNoticeText,
+} from '../entities/Message';
+import { messageService } from '../../services/messageService';
+import { api } from '../../services/api';
+
+// 事件类型定义
+export type MessageUseCaseEventType =
+  | 'message_received'
+  | 'message_recalled'
+  | 'typing_status'
+  | 'group_notice'
+  | 'connection_changed'
+  | 'error';
+
+export interface MessageUseCaseEvent {
+  type: MessageUseCaseEventType;
+  payload: any;
+  timestamp: number;
+}
+
+export type MessageUseCaseSubscriber = (event: MessageUseCaseEvent) => void;
+
+// 已读状态保护记录
+interface ReadStateRecord {
+  timestamp: number;
+  version: number;
+  lastReadSeq: number;
+  clearTimer?: NodeJS.Timeout;
+}
+
+class ProcessMessageUseCase {
+  private subscribers: Set<MessageUseCaseSubscriber> = new Set();
+  private unsubscribeFns: Array<() => void> = [];
+  private processedMessageIds: Set<string> = new Set();
+  private processedMessageIdsExpiry: Map<string, number> = new Map();
+  private pendingReadMap: Map<string, ReadStateRecord> = new Map();
+  private readStateVersion = 0;
+  private pendingUserRequests: Map<string, Promise<any>> = new Map();
+  private currentUserId: string | null = null;
+
+  // 常量
+  private readonly READ_STATE_PROTECTION_DELAY = 5000; // 5秒
+  private readonly MESSAGE_ID_EXPIRY = 5 * 60 * 1000; // 5分钟
+
+  /**
+   * 初始化用例
+   */
+  initialize(currentUserId: string | null): void {
+    this.currentUserId = currentUserId;
+    this.setupSSEListeners();
+  }
+
+  /**
+   * 销毁用例
+   */
+  destroy(): void {
+    this.unsubscribeFns.forEach((fn) => fn());
+    this.unsubscribeFns = [];
+    this.subscribers.clear();
+    this.processedMessageIds.clear();
+    this.processedMessageIdsExpiry.clear();
+    this.pendingReadMap.clear();
+    this.pendingUserRequests.clear();
+  }
+
+  /**
+   * 设置SSE监听器
+   */
+  private setupSSEListeners(): void {
+    // 监听私聊消息
+    const unsubChat = sseClient.on('chat', (message) => {
+      this.handleNewMessage(message);
+    });
+
+    // 监听群聊消息
+    const unsubGroupMessage = sseClient.on('group_message', (message) => {
+      this.handleNewMessage(message);
+    });
+
+    // 监听私聊已读回执
+    const unsubRead = sseClient.on('read', (message) => {
+      this.handleReadReceipt(message);
+    });
+
+    // 监听群聊已读回执
+    const unsubGroupRead = sseClient.on('group_read', (message) => {
+      this.handleGroupReadReceipt(message);
+    });
+
+    // 监听私聊消息撤回
+    const unsubRecall = sseClient.on('recall', (message) => {
+      this.handleRecallMessage(message);
+    });
+
+    // 监听群聊消息撤回
+    const unsubGroupRecall = sseClient.on('group_recall', (message) => {
+      this.handleGroupRecallMessage(message);
+    });
+
+    // 监听群聊输入状态
+    const unsubGroupTyping = sseClient.on('group_typing', (message) => {
+      this.handleGroupTyping(message);
+    });
+
+    // 监听群通知
+    const unsubGroupNotice = sseClient.on('group_notice', (message) => {
+      this.handleGroupNotice(message);
+    });
+
+    // 监听连接状态
+    const unsubConnected = sseClient.on('connected', () => {
+      this.notifySubscribers({
+        type: 'connection_changed',
+        payload: { connected: true },
+        timestamp: Date.now(),
+      });
+    });
+
+    const unsubDisconnected = sseClient.on('disconnected', () => {
+      this.notifySubscribers({
+        type: 'connection_changed',
+        payload: { connected: false },
+        timestamp: Date.now(),
+      });
+    });
+
+    this.unsubscribeFns = [
+      unsubChat,
+      unsubGroupMessage,
+      unsubRead,
+      unsubGroupRead,
+      unsubRecall,
+      unsubGroupRecall,
+      unsubGroupTyping,
+      unsubGroupNotice,
+      unsubConnected,
+      unsubDisconnected,
+    ];
+  }
+
+  /**
+   * 处理新消息
+   */
+  private async handleNewMessage(message: any): Promise<void> {
+    const { conversation_id, id, sender_id, seq, segments, created_at, _isAck } = message;
+
+    // 消息去重检查
+    if (this.isMessageProcessed(id)) {
+      return;
+    }
+    this.markMessageAsProcessed(id);
+
+    // 构造消息对象
+    const newMessage = createMessage({
+      id,
+      conversationId: String(conversation_id),
+      senderId: sender_id,
+      seq,
+      segments: segments || [],
+      createdAt: created_at,
+    });
+
+    // 异步获取发送者信息（如果是群聊且不是当前用户发送的）
+    if (message.type === 'group_message' && sender_id && sender_id !== this.currentUserId) {
+      this.enrichMessageWithSender(newMessage);
+    }
+
+    // 异步保存到本地数据库
+    const isRead = _isAck || sender_id === this.currentUserId;
+    messageRepository.saveMessage(newMessage, isRead).catch((error) => {
+      console.error('[ProcessMessageUseCase] 保存消息失败:', error);
+    });
+
+    // 通知订阅者
+    this.notifySubscribers({
+      type: 'message_received',
+      payload: {
+        message: newMessage,
+        isCurrentUser: sender_id === this.currentUserId,
+        isAck: _isAck,
+      },
+      timestamp: Date.now(),
+    });
+  }
+
+  /**
+   * 丰富消息的发送者信息
+   */
+  private async enrichMessageWithSender(message: Message): Promise<void> {
+    try {
+      const user = await this.getSenderInfo(message.senderId);
+      if (user) {
+        message.sender = user;
+        // 重新通知，包含发送者信息
+        this.notifySubscribers({
+          type: 'message_received',
+          payload: {
+            message,
+            isCurrentUser: false,
+            isUpdated: true,
+          },
+          timestamp: Date.now(),
+        });
+      }
+    } catch (error) {
+      console.error('[ProcessMessageUseCase] 获取发送者信息失败:', error);
+    }
+  }
+
+  /**
+   * 获取发送者信息（带缓存和去重）
+   */
+  private async getSenderInfo(userId: string): Promise<any | null> {
+    // 先检查本地缓存
+    const cachedUser = await messageRepository.getUserCache(userId);
+    if (cachedUser) {
+      return cachedUser;
+    }
+
+    // 检查是否已有正在进行的请求
+    const pendingRequest = this.pendingUserRequests.get(userId);
+    if (pendingRequest) {
+      return pendingRequest;
+    }
+
+    // 发起新请求
+    const request = this.fetchUserInfo(userId);
+    this.pendingUserRequests.set(userId, request);
+
+    try {
+      const user = await request;
+      return user;
+    } finally {
+      this.pendingUserRequests.delete(userId);
+    }
+  }
+
+  /**
+   * 从服务器获取用户信息
+   */
+  private async fetchUserInfo(userId: string): Promise<any | null> {
+    try {
+      const response = await api.get(`/users/${userId}`);
+      if (response.code === 0 && response.data) {
+        await messageRepository.saveUserCache(response.data);
+        return response.data;
+      }
+      return null;
+    } catch (error) {
+      console.error(`[ProcessMessageUseCase] 获取用户信息失败: ${userId}`, error);
+      return null;
+    }
+  }
+
+  /**
+   * 检查消息是否已处理
+   */
+  private isMessageProcessed(messageId: string): boolean {
+    return this.processedMessageIds.has(messageId);
+  }
+
+  /**
+   * 标记消息已处理
+   */
+  private markMessageAsProcessed(messageId: string): void {
+    this.processedMessageIds.add(messageId);
+    this.processedMessageIdsExpiry.set(messageId, Date.now());
+
+    // 定期清理
+    if (this.processedMessageIds.size > 1000) {
+      this.cleanupProcessedMessageIds();
+    }
+  }
+
+  /**
+   * 清理过期的消息ID
+   */
+  private cleanupProcessedMessageIds(): void {
+    const now = Date.now();
+    for (const [id, timestamp] of this.processedMessageIdsExpiry.entries()) {
+      if (now - timestamp > this.MESSAGE_ID_EXPIRY) {
+        this.processedMessageIds.delete(id);
+        this.processedMessageIdsExpiry.delete(id);
+      }
+    }
+  }
+
+  /**
+   * 处理私聊已读回执
+   */
+  private handleReadReceipt(message: any): void {
+    // 可以在这里处理对方已读的状态更新
+  }
+
+  /**
+   * 处理群聊已读回执
+   */
+  private handleGroupReadReceipt(message: any): void {
+    // 可以在这里处理群聊已读状态更新
+  }
+
+  /**
+   * 处理私聊消息撤回
+   */
+  private handleRecallMessage(message: any): Promise<void> {
+    const { conversation_id, message_id } = message;
+
+    // 更新本地数据库状态
+    messageRepository
+      .updateMessageStatus(message_id, 'recalled', true)
+      .catch((error) => {
+        console.error('[ProcessMessageUseCase] 更新撤回状态失败:', error);
+      });
+
+    // 通知订阅者
+    this.notifySubscribers({
+      type: 'message_recalled',
+      payload: {
+        conversationId: String(conversation_id),
+        messageId: message_id,
+        isGroup: false,
+      },
+      timestamp: Date.now(),
+    });
+
+    return Promise.resolve();
+  }
+
+  /**
+   * 处理群聊消息撤回
+   */
+  private handleGroupRecallMessage(message: any): Promise<void> {
+    const { conversation_id, message_id } = message;
+
+    // 更新本地数据库状态
+    messageRepository
+      .updateMessageStatus(message_id, 'recalled', true)
+      .catch((error) => {
+        console.error('[ProcessMessageUseCase] 更新撤回状态失败:', error);
+      });
+
+    // 通知订阅者
+    this.notifySubscribers({
+      type: 'message_recalled',
+      payload: {
+        conversationId: String(conversation_id),
+        messageId: message_id,
+        isGroup: true,
+      },
+      timestamp: Date.now(),
+    });
+
+    return Promise.resolve();
+  }
+
+  /**
+   * 处理群聊输入状态
+   */
+  private handleGroupTyping(message: any): void {
+    const { group_id, user_id, is_typing } = message;
+
+    this.notifySubscribers({
+      type: 'typing_status',
+      payload: {
+        groupId: String(group_id),
+        userId: user_id,
+        isTyping: is_typing,
+      },
+      timestamp: Date.now(),
+    });
+  }
+
+  /**
+   * 处理群通知
+   */
+  private handleGroupNotice(message: any): void {
+    const { notice_type, group_id, data, timestamp, message_id, seq } = message;
+    const groupIdStr = String(group_id);
+
+    const notice: GroupNotice = {
+      type: notice_type,
+      groupId: groupIdStr,
+      data: data || {},
+      timestamp: timestamp || Date.now(),
+      messageId: message_id,
+      seq,
+    };
+
+    // 通知订阅者
+    this.notifySubscribers({
+      type: 'group_notice',
+      payload: {
+        notice,
+        text: buildGroupNoticeText(notice),
+      },
+      timestamp: Date.now(),
+    });
+  }
+
+  /**
+   * 标记会话已读
+   */
+  async markAsRead(conversationId: string, seq: number): Promise<void> {
+    const existingRecord = this.pendingReadMap.get(conversationId);
+
+    // 使用seq去重
+    if (existingRecord && seq <= existingRecord.lastReadSeq) {
+      return;
+    }
+
+    // 清除可能存在的旧定时器
+    if (existingRecord?.clearTimer) {
+      clearTimeout(existingRecord.clearTimer);
+    }
+
+    // 递增全局版本号
+    this.readStateVersion++;
+    const currentVersion = this.readStateVersion;
+
+    // 记录已读状态
+    this.pendingReadMap.set(conversationId, {
+      timestamp: Date.now(),
+      version: currentVersion,
+      lastReadSeq: seq,
+    });
+
+    // 更新本地数据库
+    await messageRepository.markConversationAsRead(conversationId);
+
+    // 调用API
+    try {
+      await messageService.markAsRead(conversationId, seq);
+    } catch (error) {
+      console.error('[ProcessMessageUseCase] 标记已读API失败:', error);
+      this.pendingReadMap.delete(conversationId);
+      throw error;
+    }
+
+    // 设置延迟清除保护
+    const clearTimer = setTimeout(() => {
+      const record = this.pendingReadMap.get(conversationId);
+      if (record && record.version === currentVersion) {
+        this.pendingReadMap.delete(conversationId);
+      }
+    }, this.READ_STATE_PROTECTION_DELAY);
+
+    this.pendingReadMap.set(conversationId, {
+      timestamp: Date.now(),
+      version: currentVersion,
+      lastReadSeq: seq,
+      clearTimer,
+    });
+  }
+
+  /**
+   * 检查会话是否有进行中的已读请求
+   */
+  hasPendingRead(conversationId: string): boolean {
+    return this.pendingReadMap.has(conversationId);
+  }
+
+  /**
+   * 获取进行中的已读记录
+   */
+  getPendingReadRecord(conversationId: string): ReadStateRecord | undefined {
+    return this.pendingReadMap.get(conversationId);
+  }
+
+  /**
+   * 发送消息
+   */
+  async sendMessage(
+    conversationId: string,
+    segments: any[],
+    options?: { replyToId?: string }
+  ): Promise<Message | null> {
+    try {
+      const response = await messageService.sendMessage(conversationId, {
+        segments,
+        reply_to_id: options?.replyToId,
+      });
+
+      if (response) {
+        const message = createMessage({
+          id: response.id,
+          conversationId,
+          senderId: this.currentUserId || '',
+          seq: response.seq,
+          segments,
+          createdAt: new Date().toISOString(),
+        });
+
+        // 保存到本地数据库
+        await messageRepository.saveMessage(message, true);
+
+        return message;
+      }
+
+      return null;
+    } catch (error) {
+      console.error('[ProcessMessageUseCase] 发送消息失败:', error);
+      throw error;
+    }
+  }
+
+  /**
+   * 获取本地消息
+   */
+  async getLocalMessages(conversationId: string, limit: number = 20): Promise<Message[]> {
+    return messageRepository.getMessagesByConversation(conversationId, limit);
+  }
+
+  /**
+   * 获取历史消息
+   */
+  async getHistoryMessages(
+    conversationId: string,
+    beforeSeq: number,
+    limit: number = 20
+  ): Promise<Message[]> {
+    // 先从本地获取
+    const localMessages = await messageRepository.getMessagesBeforeSeq(
+      conversationId,
+      beforeSeq,
+      limit
+    );
+
+    if (localMessages.length >= limit) {
+      return localMessages;
+    }
+
+    // 本地数据不足，从服务端获取
+    try {
+      const response = await messageService.getMessages(
+        conversationId,
+        undefined,
+        beforeSeq,
+        limit
+      );
+
+      if (response?.messages && response.messages.length > 0) {
+        const serverMessages = response.messages.map((m: any) =>
+          createMessage({
+            id: m.id,
+            conversationId: m.conversation_id || conversationId,
+            senderId: m.sender_id,
+            seq: m.seq,
+            segments: m.segments || [],
+            createdAt: m.created_at,
+            status: m.status || 'normal',
+          })
+        );
+
+        // 保存到本地
+        await messageRepository.saveMessages(serverMessages, false);
+
+        return serverMessages;
+      }
+    } catch (error) {
+      console.error('[ProcessMessageUseCase] 获取历史消息失败:', error);
+    }
+
+    return localMessages;
+  }
+
+  /**
+   * 从服务端同步消息
+   */
+  async syncMessagesFromServer(
+    conversationId: string,
+    afterSeq?: number
+  ): Promise<Message[]> {
+    try {
+      const response = await messageService.getMessages(conversationId, afterSeq);
+
+      if (response?.messages && response.messages.length > 0) {
+        const messages = response.messages.map((m: any) =>
+          createMessage({
+            id: m.id,
+            conversationId: m.conversation_id || conversationId,
+            senderId: m.sender_id,
+            seq: m.seq,
+            segments: m.segments || [],
+            createdAt: m.created_at,
+            status: m.status || 'normal',
+          })
+        );
+
+        // 保存到本地
+        await messageRepository.saveMessages(messages, false);
+
+        return messages;
+      }
+    } catch (error) {
+      console.error('[ProcessMessageUseCase] 同步消息失败:', error);
+    }
+
+    return [];
+  }
+
+  /**
+   * 订阅事件
+   */
+  subscribe(subscriber: MessageUseCaseSubscriber): () => void {
+    this.subscribers.add(subscriber);
+
+    return () => {
+      this.subscribers.delete(subscriber);
+    };
+  }
+
+  /**
+   * 通知订阅者
+   */
+  private notifySubscribers(event: MessageUseCaseEvent): void {
+    this.subscribers.forEach((subscriber) => {
+      try {
+        subscriber(event);
+      } catch (error) {
+        console.error('[ProcessMessageUseCase] 订阅者执行失败:', error);
+      }
+    });
+  }
+
+  /**
+   * 获取当前用户ID
+   */
+  getCurrentUserId(): string | null {
+    return this.currentUserId;
+  }
+
+  /**
+   * 设置当前用户ID
+   */
+  setCurrentUserId(userId: string | null): void {
+    this.currentUserId = userId;
+  }
+}
+
+export const processMessageUseCase = new ProcessMessageUseCase();
+export default processMessageUseCase;

src/data/datasources/ApiDataSource.ts

@@ -0,0 +1,98 @@
+/**
+ * API 数据源实现
+ * 封装所有 API 调用，统一错误处理和请求拦截
+ */
+
+import { api, ApiResponse, ApiError } from '../../services/api';
+import { IApiDataSource, DataSourceError } from './interfaces';
+
+export class ApiDataSource implements IApiDataSource {
+  private baseUrl: string;
+
+  constructor(baseUrl?: string) {
+    this.baseUrl = baseUrl || '';
+  }
+
+  private buildUrl(url: string): string {
+    if (url.startsWith('http')) {
+      return url;
+    }
+    return `${this.baseUrl}${url}`;
+  }
+
+  private handleError(error: unknown, operation: string): never {
+    if (error instanceof ApiError) {
+      throw new DataSourceError(
+        error.message,
+        String(error.code),
+        'ApiDataSource',
+        error
+      );
+    }
+    
+    const message = error instanceof Error ? error.message : 'Unknown error';
+    throw new DataSourceError(
+      `API ${operation} failed: ${message}`,
+      'API_ERROR',
+      'ApiDataSource',
+      error instanceof Error ? error : undefined
+    );
+  }
+
+  async get<T>(url: string, params?: any): Promise<T> {
+    try {
+      const fullUrl = this.buildUrl(url);
+      const response = await api.get<T>(fullUrl, params);
+      return response.data;
+    } catch (error) {
+      this.handleError(error, 'GET');
+    }
+  }
+
+  async post<T>(url: string, data?: any): Promise<T> {
+    try {
+      const fullUrl = this.buildUrl(url);
+      const response = await api.post<T>(fullUrl, data);
+      return response.data;
+    } catch (error) {
+      this.handleError(error, 'POST');
+    }
+  }
+
+  async put<T>(url: string, data?: any): Promise<T> {
+    try {
+      const fullUrl = this.buildUrl(url);
+      const response = await api.put<T>(fullUrl, data);
+      return response.data;
+    } catch (error) {
+      this.handleError(error, 'PUT');
+    }
+  }
+
+  async delete<T>(url: string, data?: any): Promise<T> {
+    try {
+      const fullUrl = this.buildUrl(url);
+      const response = await api.delete<T>(fullUrl, data);
+      return response.data;
+    } catch (error) {
+      this.handleError(error, 'DELETE');
+    }
+  }
+
+  async upload<T>(
+    url: string,
+    file: { uri: string; name: string; type: string },
+    additionalData?: Record<string, string>
+  ): Promise<T> {
+    try {
+      const fullUrl = this.buildUrl(url);
+      const response = await api.upload<T>(fullUrl, file, additionalData);
+      return response.data;
+    } catch (error) {
+      this.handleError(error, 'UPLOAD');
+    }
+  }
+}
+
+// 导出单例实例
+export const apiDataSource = new ApiDataSource();

src/data/datasources/CacheDataSource.ts

@@ -0,0 +1,199 @@
+/**
+ * 缓存数据源实现
+ * 基于内存和 AsyncStorage 的混合缓存实现
+ */
+
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import { ICacheDataSource, DataSourceError } from './interfaces';
+
+interface CacheEntry<T> {
+  value: T;
+  expiry: number | null; // null 表示永不过期
+}
+
+export class CacheDataSource implements ICacheDataSource {
+  private memoryCache: Map<string, CacheEntry<any>> = new Map();
+  private maxSize: number;
+  private defaultTtl: number; // 默认过期时间（毫秒）
+  private persistPrefix: string;
+
+  constructor(config?: {
+    maxSize?: number;
+    defaultTtl?: number; // 默认5分钟
+    persistPrefix?: string;
+  }) {
+    this.maxSize = config?.maxSize || 100;
+    this.defaultTtl = config?.defaultTtl || 5 * 60 * 1000;
+    this.persistPrefix = config?.persistPrefix || 'cache_';
+  }
+
+  /**
+   * 检查 key 是否过期
+   */
+  private isExpired(entry: CacheEntry<any>): boolean {
+    if (entry.expiry === null) return false;
+    return Date.now() > entry.expiry;
+  }
+
+  /**
+   * 清理过期缓存
+   */
+  private cleanup(): void {
+    const now = Date.now();
+    for (const [key, entry] of this.memoryCache.entries()) {
+      if (entry.expiry !== null && now > entry.expiry) {
+        this.memoryCache.delete(key);
+      }
+    }
+
+    // 如果仍然超过最大大小，删除最旧的条目
+    while (this.memoryCache.size > this.maxSize) {
+      const firstKey = this.memoryCache.keys().next().value;
+      if (firstKey !== undefined) {
+        this.memoryCache.delete(firstKey);
+      }
+    }
+  }
+
+  /**
+   * 生成持久化存储 key
+   */
+  private getPersistKey(key: string): string {
+    return `${this.persistPrefix}${key}`;
+  }
+
+  // ==================== ICacheDataSource 实现 ====================
+
+  async get<T>(key: string): Promise<T | null> {
+    try {
+      // 先检查内存缓存
+      const memoryEntry = this.memoryCache.get(key);
+      if (memoryEntry) {
+        if (!this.isExpired(memoryEntry)) {
+          return memoryEntry.value as T;
+        }
+        // 过期了，从内存中删除
+        this.memoryCache.delete(key);
+      }
+
+      // 尝试从持久化存储读取
+      const persistKey = this.getPersistKey(key);
+      const stored = await AsyncStorage.getItem(persistKey);
+      if (stored) {
+        const entry: CacheEntry<T> = JSON.parse(stored);
+        if (!this.isExpired(entry)) {
+          // 重新加载到内存缓存
+          this.memoryCache.set(key, entry);
+          this.cleanup();
+          return entry.value;
+        }
+        // 过期了，删除
+        await AsyncStorage.removeItem(persistKey);
+      }
+
+      return null;
+    } catch (error) {
+      console.warn(`[CacheDataSource] Failed to get ${key}:`, error);
+      return null;
+    }
+  }
+
+  async set<T>(key: string, value: T, ttl?: number): Promise<void> {
+    try {
+      const expiry = ttl === undefined 
+        ? (this.defaultTtl > 0 ? Date.now() + this.defaultTtl : null)
+        : (ttl > 0 ? Date.now() + ttl : null);
+
+      const entry: CacheEntry<T> = { value, expiry };
+
+      // 存入内存
+      this.memoryCache.set(key, entry);
+      this.cleanup();
+
+      // 持久化存储（重要数据）
+      if (ttl === undefined || ttl > 0) {
+        const persistKey = this.getPersistKey(key);
+        await AsyncStorage.setItem(persistKey, JSON.stringify(entry));
+      }
+    } catch (error) {
+      throw new DataSourceError(
+        `Failed to set cache ${key}`,
+        'CACHE_SET_ERROR',
+        'CacheDataSource',
+        error instanceof Error ? error : undefined
+      );
+    }
+  }
+
+  async delete(key: string): Promise<void> {
+    try {
+      // 从内存删除
+      this.memoryCache.delete(key);
+
+      // 从持久化存储删除
+      const persistKey = this.getPersistKey(key);
+      await AsyncStorage.removeItem(persistKey);
+    } catch (error) {
+      throw new DataSourceError(
+        `Failed to delete cache ${key}`,
+        'CACHE_DELETE_ERROR',
+        'CacheDataSource',
+        error instanceof Error ? error : undefined
+      );
+    }
+  }
+
+  async clear(): Promise<void> {
+    try {
+      // 清空内存
+      this.memoryCache.clear();
+
+      // 清空持久化存储中的所有缓存项
+      const keys = await AsyncStorage.getAllKeys();
+      const cacheKeys = keys.filter(k => k.startsWith(this.persistPrefix));
+      if (cacheKeys.length > 0) {
+        await AsyncStorage.multiRemove(cacheKeys);
+      }
+    } catch (error) {
+      throw new DataSourceError(
+        'Failed to clear cache',
+        'CACHE_CLEAR_ERROR',
+        'CacheDataSource',
+        error instanceof Error ? error : undefined
+      );
+    }
+  }
+
+  async has(key: string): Promise<boolean> {
+    try {
+      // 检查内存
+      const memoryEntry = this.memoryCache.get(key);
+      if (memoryEntry && !this.isExpired(memoryEntry)) {
+        return true;
+      }
+
+      // 检查持久化存储
+      const persistKey = this.getPersistKey(key);
+      const stored = await AsyncStorage.getItem(persistKey);
+      if (stored) {
+        const entry: CacheEntry<any> = JSON.parse(stored);
+        return !this.isExpired(entry);
+      }
+
+      return false;
+    } catch (error) {
+      return false;
+    }
+  }
+
+  async getMultiple<T>(keys: string[]): Promise<(T | null)[]> {
+    return Promise.all(keys.map(key => this.get<T>(key)));
+  }
+
+  async setMultiple<T>(entries: { key: string; value: T; ttl?: number }[]): Promise<void> {
+    await Promise.all(entries.map(entry => this.set(entry.key, entry.value, entry.ttl)));
+  }
+}
+
+// 导出单例实例
+export const cacheDataSource = new CacheDataSource();

src/data/datasources/LocalDataSource.ts

@@ -0,0 +1,323 @@
+/**
+ * 本地数据库数据源实现
+ * 封装所有 SQLite 操作，提供统一的错误处理和事务支持
+ */
+
+import * as SQLite from 'expo-sqlite';
+import { ILocalDataSource, DataSourceError } from './interfaces';
+
+// 数据库实例管理
+let dbInstance: SQLite.SQLiteDatabase | null = null;
+let currentDbName: string | null = null;
+let writeQueue: Promise<void> = Promise.resolve();
+
+export interface LocalDataSourceConfig {
+  dbName?: string;
+  userId?: string;
+}
+
+export class LocalDataSource implements ILocalDataSource {
+  private db: SQLite.SQLiteDatabase | null = null;
+  private dbName: string;
+  private initialized = false;
+  private initializingPromise: Promise<void> | null = null;
+
+  constructor(config: LocalDataSourceConfig = {}) {
+    // 如果提供了userId，使用用户专属数据库
+    this.dbName = config.dbName || (config.userId ? `carrot_bbs_${config.userId}.db` : 'carrot_bbs.db');
+  }
+
+  /**
+   * 初始化数据库连接
+   */
+  async initialize(): Promise<void> {
+    if (this.initialized && this.db) {
+      return;
+    }
+
+    // 防止并发初始化导致连接状态竞争
+    if (this.initializingPromise) {
+      await this.initializingPromise;
+      return;
+    }
+
+    this.initializingPromise = this.doInitialize();
+    try {
+      await this.initializingPromise;
+    } finally {
+      this.initializingPromise = null;
+    }
+  }
+
+  private async doInitialize(): Promise<void> {
+    try {
+      // 使用全局实例管理
+      if (dbInstance && currentDbName === this.dbName) {
+        this.db = dbInstance;
+        this.initialized = true;
+        return;
+      }
+
+      // 关闭旧连接
+      if (dbInstance) {
+        try {
+          await dbInstance.closeAsync();
+        } catch (e) {
+          console.warn('关闭旧数据库连接失败:', e);
+        }
+      }
+
+      // 创建新连接
+      this.db = await SQLite.openDatabaseAsync(this.dbName);
+      dbInstance = this.db;
+      currentDbName = this.dbName;
+      this.initialized = true;
+
+      // 初始化数据库表结构
+      await this.createTables();
+    } catch (error) {
+      this.handleError(error, 'INITIALIZE');
+    }
+  }
+
+  /**
+   * 创建数据库表结构
+   */
+  private async createTables(): Promise<void> {
+    if (!this.db) return;
+
+    const tables = [
+      // 消息表
+      `CREATE TABLE IF NOT EXISTS messages (
+        id TEXT PRIMARY KEY NOT NULL,
+        conversationId TEXT NOT NULL,
+        senderId TEXT NOT NULL,
+        content TEXT,
+        type TEXT DEFAULT 'text',
+        isRead INTEGER DEFAULT 0,
+        createdAt TEXT NOT NULL,
+        seq INTEGER DEFAULT 0,
+        status TEXT DEFAULT 'normal',
+        segments TEXT
+      )`,
+      // 会话表
+      `CREATE TABLE IF NOT EXISTS conversations (
+        id TEXT PRIMARY KEY NOT NULL,
+        participantId TEXT NOT NULL,
+        lastMessageId TEXT,
+        lastSeq INTEGER DEFAULT 0,
+        unreadCount INTEGER DEFAULT 0,
+        createdAt TEXT NOT NULL,
+        updatedAt TEXT NOT NULL
+      )`,
+      // 会话缓存表
+      `CREATE TABLE IF NOT EXISTS conversation_cache (
+        id TEXT PRIMARY KEY NOT NULL,
+        data TEXT NOT NULL,
+        updatedAt TEXT NOT NULL
+      )`,
+      // 会话列表缓存表
+      `CREATE TABLE IF NOT EXISTS conversation_list_cache (
+        id TEXT PRIMARY KEY NOT NULL,
+        data TEXT NOT NULL,
+        updatedAt TEXT NOT NULL
+      )`,
+      // 用户缓存表
+      `CREATE TABLE IF NOT EXISTS users (
+        id TEXT PRIMARY KEY NOT NULL,
+        data TEXT NOT NULL,
+        updatedAt TEXT NOT NULL
+      )`,
+      // 当前登录用户缓存
+      `CREATE TABLE IF NOT EXISTS current_user_cache (
+        id TEXT PRIMARY KEY NOT NULL,
+        data TEXT NOT NULL,
+        updatedAt TEXT NOT NULL
+      )`,
+      // 群组缓存表
+      `CREATE TABLE IF NOT EXISTS groups (
+        id TEXT PRIMARY KEY NOT NULL,
+        data TEXT NOT NULL,
+        updatedAt TEXT NOT NULL
+      )`,
+      // 群成员缓存表
+      `CREATE TABLE IF NOT EXISTS group_members (
+        groupId TEXT NOT NULL,
+        userId TEXT NOT NULL,
+        data TEXT NOT NULL,
+        updatedAt TEXT NOT NULL,
+        PRIMARY KEY (groupId, userId)
+      )`,
+      // 帖子缓存表
+      `CREATE TABLE IF NOT EXISTS posts_cache (
+        id TEXT PRIMARY KEY NOT NULL,
+        data TEXT NOT NULL,
+        updatedAt TEXT NOT NULL
+      )`,
+    ];
+
+    for (const sql of tables) {
+      await this.db.execAsync(sql);
+    }
+
+    // 创建索引
+    const indexes = [
+      `CREATE INDEX IF NOT EXISTS idx_messages_conversationId ON messages(conversationId)`,
+      `CREATE INDEX IF NOT EXISTS idx_messages_seq ON messages(seq)`,
+      `CREATE INDEX IF NOT EXISTS idx_messages_conversation_seq ON messages(conversationId, seq)`,
+      `CREATE INDEX IF NOT EXISTS idx_group_members_groupId ON group_members(groupId)`,
+    ];
+
+    for (const sql of indexes) {
+      await this.db.execAsync(sql);
+    }
+  }
+
+  /**
+   * 处理错误
+   */
+  private handleError(error: unknown, operation: string): never {
+    const message = error instanceof Error ? error.message : 'Unknown error';
+    throw new DataSourceError(
+      `Database ${operation} failed: ${message}`,
+      'DB_ERROR',
+      'LocalDataSource',
+      error instanceof Error ? error : undefined
+    );
+  }
+
+  /**
+   * 检查数据库连接
+   */
+  private ensureDb(): SQLite.SQLiteDatabase {
+    if (!this.db) {
+      throw new DataSourceError(
+        'Database not initialized',
+        'DB_NOT_INITIALIZED',
+        'LocalDataSource'
+      );
+    }
+    return this.db;
+  }
+
+  // ==================== ILocalDataSource 实现 ====================
+
+  async query<T>(sql: string, params?: any[]): Promise<T[]> {
+    try {
+      const db = this.ensureDb();
+      if (params && params.length > 0) {
+        return await db.getAllAsync<T>(sql, params as any);
+      }
+      return await db.getAllAsync<T>(sql);
+    } catch (error) {
+      this.handleError(error, 'QUERY');
+    }
+  }
+
+  async getFirst<T>(sql: string, params?: any[]): Promise<T | null> {
+    try {
+      const db = this.ensureDb();
+      if (params && params.length > 0) {
+        return await db.getFirstAsync<T>(sql, params as any);
+      }
+      return await db.getFirstAsync<T>(sql);
+    } catch (error) {
+      this.handleError(error, 'GET_FIRST');
+    }
+  }
+
+  async execute(sql: string, params?: any[]): Promise<void> {
+    try {
+      const db = this.ensureDb();
+      await db.execAsync(sql);
+    } catch (error) {
+      this.handleError(error, 'EXECUTE');
+    }
+  }
+
+  async run(sql: string, params?: any[]): Promise<{ lastInsertRowId: number; changes: number }> {
+    try {
+      const db = this.ensureDb();
+      if (params && params.length > 0) {
+        return await db.runAsync(sql, params as any);
+      }
+      return await db.runAsync(sql);
+    } catch (error) {
+      if (this.isRecoverableError(error)) {
+        this.db = null;
+        this.initialized = false;
+        dbInstance = null;
+        await this.initialize();
+        const db = this.ensureDb();
+        if (params && params.length > 0) {
+          return await db.runAsync(sql, params as any);
+        }
+        return await db.runAsync(sql);
+      }
+      this.handleError(error, 'RUN');
+    }
+  }
+
+  async transaction(operations: () => Promise<void>): Promise<void> {
+    try {
+      const db = this.ensureDb();
+      await db.withTransactionAsync(async () => {
+        await operations();
+      });
+    } catch (error) {
+      this.handleError(error, 'TRANSACTION');
+    }
+  }
+
+  async batch(operations: (db: ILocalDataSource) => Promise<void>): Promise<void> {
+    try {
+      await this.transaction(async () => {
+        await operations(this);
+      });
+    } catch (error) {
+      this.handleError(error, 'BATCH');
+    }
+  }
+
+  // ==================== 队列写入支持 ====================
+
+  /**
+   * 使用队列执行写入操作（避免并发写入冲突）
+   */
+  async enqueueWrite<T>(operation: () => Promise<T>): Promise<T> {
+    const wrappedOperation = async () => {
+      try {
+        return await operation();
+      } catch (error) {
+        // 尝试重连后重试
+        if (this.isRecoverableError(error)) {
+          console.error('数据库写入异常，尝试重连后重试:', error);
+          this.db = null;
+          dbInstance = null;
+          await this.initialize();
+          return operation();
+        }
+        throw error;
+      }
+    };
+
+    const queued = writeQueue.then(wrappedOperation, wrappedOperation);
+    writeQueue = queued.then(() => undefined, () => undefined);
+    return queued;
+  }
+
+  /**
+   * 判断错误是否可恢复
+   */
+  private isRecoverableError(error: unknown): boolean {
+    const message = String(error);
+    return (
+      message.includes('NativeDatabase.prepareAsync') ||
+      message.includes('NullPointerException') ||
+      message.includes('database is locked')
+    );
+  }
+}
+
+// 导出单例实例
+export const localDataSource = new LocalDataSource();

src/data/datasources/SSEClient.ts

@@ -0,0 +1,184 @@
+/**
+ * SSEClient - SSE连接管理
+ * 只负责SSE连接管理，提供事件驱动架构
+ */
+
+import {
+  sseService,
+  WSChatMessage,
+  WSGroupChatMessage,
+  WSReadMessage,
+  WSGroupReadMessage,
+  WSRecallMessage,
+  WSGroupRecallMessage,
+  WSGroupTypingMessage,
+  WSGroupNoticeMessage,
+  WSMessageType,
+} from '../../services/sseService';
+
+// 事件处理器类型
+type EventHandler<T> = (data: T) => void;
+
+// SSE事件类型
+export interface SSEEvents {
+  'chat': WSChatMessage;
+  'group_message': WSGroupChatMessage;
+  'read': WSReadMessage;
+  'group_read': WSGroupReadMessage;
+  'recall': WSRecallMessage;
+  'group_recall': WSGroupRecallMessage;
+  'group_typing': WSGroupTypingMessage;
+  'group_notice': WSGroupNoticeMessage;
+  'connected': void;
+  'disconnected': void;
+  'error': Error;
+}
+
+export type SSEEventType = keyof SSEEvents;
+
+class SSEClient {
+  private handlers: Map<SSEEventType, Set<EventHandler<any>>> = new Map();
+  private unsubscribeFns: Array<() => void> = [];
+  private isInitialized = false;
+
+  /**
+   * 初始化SSE监听
+   */
+  initialize(): void {
+    if (this.isInitialized) return;
+
+    // 监听私聊消息
+    const unsubChat = sseService.on('chat', (message) => {
+      this.emit('chat', message);
+    });
+
+    // 监听群聊消息
+    const unsubGroupMessage = sseService.on('group_message', (message) => {
+      this.emit('group_message', message);
+    });
+
+    // 监听私聊已读回执
+    const unsubRead = sseService.on('read', (message) => {
+      this.emit('read', message);
+    });
+
+    // 监听群聊已读回执
+    const unsubGroupRead = sseService.on('group_read', (message) => {
+      this.emit('group_read', message);
+    });
+
+    // 监听私聊消息撤回
+    const unsubRecall = sseService.on('recall', (message) => {
+      this.emit('recall', message);
+    });
+
+    // 监听群聊消息撤回
+    const unsubGroupRecall = sseService.on('group_recall', (message) => {
+      this.emit('group_recall', message);
+    });
+
+    // 监听群聊输入状态
+    const unsubGroupTyping = sseService.on('group_typing', (message) => {
+      this.emit('group_typing', message);
+    });
+
+    // 监听群通知
+    const unsubGroupNotice = sseService.on('group_notice', (message) => {
+      this.emit('group_notice', message);
+    });
+
+    // 监听连接状态
+    const unsubConnect = sseService.onConnect(() => {
+      this.emit('connected', undefined);
+    });
+
+    const unsubDisconnect = sseService.onDisconnect(() => {
+      this.emit('disconnected', undefined);
+    });
+
+    this.unsubscribeFns = [
+      unsubChat,
+      unsubGroupMessage,
+      unsubRead,
+      unsubGroupRead,
+      unsubRecall,
+      unsubGroupRecall,
+      unsubGroupTyping,
+      unsubGroupNotice,
+      unsubConnect,
+      unsubDisconnect,
+    ];
+
+    this.isInitialized = true;
+  }
+
+  /**
+   * 销毁SSE监听
+   */
+  destroy(): void {
+    this.unsubscribeFns.forEach((fn) => fn());
+    this.unsubscribeFns = [];
+    this.handlers.clear();
+    this.isInitialized = false;
+  }
+
+  /**
+   * 订阅事件
+   */
+  on<T extends SSEEventType>(
+    event: T,
+    handler: EventHandler<SSEEvents[T]>
+  ): () => void {
+    if (!this.handlers.has(event)) {
+      this.handlers.set(event, new Set());
+    }
+    this.handlers.get(event)!.add(handler);
+
+    return () => {
+      this.handlers.get(event)?.delete(handler);
+    };
+  }
+
+  /**
+   * 触发事件
+   */
+  private emit<T extends SSEEventType>(
+    event: T,
+    data: SSEEvents[T]
+  ): void {
+    const handlers = this.handlers.get(event);
+    if (handlers) {
+      handlers.forEach((handler) => {
+        try {
+          handler(data);
+        } catch (error) {
+          console.error(`[SSEClient] 事件处理器执行失败: ${event}`, error);
+        }
+      });
+    }
+  }
+
+  /**
+   * 检查连接状态
+   */
+  isConnected(): boolean {
+    return sseService.isConnected();
+  }
+
+  /**
+   * 启动SSE连接
+   */
+  async connect(): Promise<boolean> {
+    return sseService.start();
+  }
+
+  /**
+   * 断开SSE连接
+   */
+  disconnect(): void {
+    sseService.stop();
+  }
+}
+
+export const sseClient = new SSEClient();
+export default sseClient;

src/data/datasources/index.ts

@@ -0,0 +1,9 @@
+/**
+ * 数据源导出
+ * 统一导出所有数据源实现
+ */
+
+export * from './interfaces';
+export * from './ApiDataSource';
+export * from './LocalDataSource';
+export * from './CacheDataSource';

src/data/datasources/interfaces.ts

@@ -0,0 +1,64 @@
+/**
+ * 数据源接口定义
+ * 定义所有数据源的标准接口，便于替换和测试
+ */
+
+// API 数据源接口
+export interface IApiDataSource {
+  get<T>(url: string, params?: any): Promise<T>;
+  post<T>(url: string, data?: any): Promise<T>;
+  put<T>(url: string, data?: any): Promise<T>;
+  delete<T>(url: string, data?: any): Promise<T>;
+  upload<T>(url: string, file: { uri: string; name: string; type: string }, additionalData?: Record<string, string>): Promise<T>;
+}
+
+// 本地数据源接口 (SQLite)
+export interface ILocalDataSource {
+  query<T>(sql: string, params?: any[]): Promise<T[]>;
+  getFirst<T>(sql: string, params?: any[]): Promise<T | null>;
+  execute(sql: string, params?: any[]): Promise<void>;
+  run(sql: string, params?: any[]): Promise<{ lastInsertRowId: number; changes: number }>;
+  transaction(operations: () => Promise<void>): Promise<void>;
+  batch(operations: (db: ILocalDataSource) => Promise<void>): Promise<void>;
+}
+
+// 缓存数据源接口
+export interface ICacheDataSource {
+  get<T>(key: string): Promise<T | null>;
+  set<T>(key: string, value: T, ttl?: number): Promise<void>;
+  delete(key: string): Promise<void>;
+  clear(): Promise<void>;
+  has(key: string): Promise<boolean>;
+  getMultiple<T>(keys: string[]): Promise<(T | null)[]>;
+  setMultiple<T>(entries: { key: string; value: T; ttl?: number }[]): Promise<void>;
+}
+
+// 数据源错误类型
+export class DataSourceError extends Error {
+  constructor(
+    message: string,
+    public code: string,
+    public source: string,
+    public originalError?: Error
+  ) {
+    super(message);
+    this.name = 'DataSourceError';
+  }
+}
+
+// 数据源配置
+export interface DataSourceConfig {
+  api?: {
+    baseUrl: string;
+    timeout?: number;
+    retryCount?: number;
+  };
+  local?: {
+    dbName: string;
+    version: number;
+  };
+  cache?: {
+    maxSize: number;
+    defaultTtl: number;
+  };
+}

src/data/mappers/ConversationMapper.ts

@@ -0,0 +1,302 @@
+/**
+ * 会话数据映射器
+ * 负责 Conversation 模型与 API 响应、数据库记录之间的转换
+ */
+
+import {
+  ConversationModel,
+  ConversationType,
+  UserModel,
+  GroupModel,
+  MessageModel,
+} from '../models';
+import type {
+  ConversationResponse,
+  ConversationDetailResponse,
+  UserDTO,
+  GroupResponse,
+  MessageResponse,
+} from '../../types/dto';
+import { MessageMapper } from './MessageMapper';
+
+// 数据库会话记录类型
+export interface ConversationDbRecord {
+  id: string;
+  participantId: string;
+  lastMessageId: string | null;
+  lastSeq: number;
+  unreadCount: number;
+  createdAt: string;
+  updatedAt: string;
+}
+
+// 缓存数据类型
+export interface ConversationCacheData {
+  id: string;
+  type: string;
+  is_pinned?: boolean;
+  last_seq?: number;
+  last_message?: any;
+  last_message_at?: string;
+  unread_count?: number;
+  participants?: any[];
+  my_last_read_seq?: number;
+  other_last_read_seq?: number;
+  group?: any;
+  created_at?: string;
+  updated_at?: string;
+}
+
+export class ConversationMapper {
+  /**
+   * 将 API 列表响应转换为应用模型
+   */
+  static fromApiResponse(response: ConversationResponse): ConversationModel {
+    return {
+      id: String(response.id || ''),
+      type: (response.type as ConversationType) || 'private',
+      participantId: this.extractParticipantId(response),
+      lastMessageId: response.last_message?.id,
+      lastMessage: response.last_message 
+        ? MessageMapper.fromApiResponse(response.last_message)
+        : undefined,
+      lastSeq: response.last_seq || 0,
+      myLastReadSeq: response.my_last_read_seq || 0,
+      otherLastReadSeq: response.other_last_read_seq || 0,
+      unreadCount: response.unread_count || 0,
+      isPinned: response.is_pinned || false,
+      participants: response.participants?.map(p => this.mapUserFromApi(p)),
+      group: response.group ? this.mapGroupFromApi(response.group) : undefined,
+      createdAt: new Date(response.created_at || Date.now()),
+      updatedAt: new Date(response.updated_at || Date.now()),
+    };
+  }
+
+  /**
+   * 将 API 详情响应转换为应用模型
+   */
+  static fromDetailApiResponse(response: ConversationDetailResponse): ConversationModel {
+    return {
+      id: String(response.id || ''),
+      type: (response.type as ConversationType) || 'private',
+      participantId: this.extractParticipantIdFromDetail(response),
+      lastMessageId: response.last_message?.id,
+      lastMessage: response.last_message 
+        ? MessageMapper.fromApiResponse(response.last_message)
+        : undefined,
+      lastSeq: response.last_seq || 0,
+      myLastReadSeq: response.my_last_read_seq || 0,
+      otherLastReadSeq: response.other_last_read_seq || 0,
+      unreadCount: response.unread_count || 0,
+      isPinned: response.is_pinned || false,
+      participants: response.participants?.map(p => this.mapUserFromApi(p)),
+      group: response.group ? this.mapGroupFromApi(response.group) : undefined,
+      createdAt: new Date(response.created_at || Date.now()),
+      updatedAt: new Date(response.updated_at || Date.now()),
+    };
+  }
+
+  /**
+   * 将 API 响应数组转换为应用模型数组
+   */
+  static fromApiResponseList(responses: ConversationResponse[]): ConversationModel[] {
+    return responses.map(r => this.fromApiResponse(r));
+  }
+
+  /**
+   * 从缓存数据转换为应用模型
+   */
+  static fromCacheData(id: string, cached: ConversationCacheData): ConversationModel {
+    return {
+      id: String(cached?.id || id),
+      type: (cached?.type as ConversationType) || 'private',
+      participantId: '',
+      lastSeq: Number(cached?.last_seq || 0),
+      lastMessage: cached?.last_message 
+        ? MessageMapper.fromApiResponse(cached.last_message)
+        : undefined,
+      lastMessageId: cached?.last_message?.id,
+      myLastReadSeq: Number(cached?.my_last_read_seq || 0),
+      otherLastReadSeq: Number(cached?.other_last_read_seq || 0),
+      unreadCount: Number(cached?.unread_count || 0),
+      isPinned: Boolean(cached?.is_pinned),
+      participants: Array.isArray(cached?.participants) 
+        ? cached.participants.map(p => this.mapUserFromApi(p))
+        : [],
+      group: cached?.group ? this.mapGroupFromApi(cached.group) : undefined,
+      createdAt: new Date(cached?.created_at || Date.now()),
+      updatedAt: new Date(cached?.updated_at || Date.now()),
+    };
+  }
+
+  /**
+   * 将数据库记录转换为应用模型
+   */
+  static fromDbRecord(record: ConversationDbRecord): ConversationModel {
+    return {
+      id: record.id,
+      type: 'private', // 数据库中不存储类型，需要额外查询
+      participantId: record.participantId,
+      lastMessageId: record.lastMessageId || undefined,
+      lastSeq: record.lastSeq,
+      myLastReadSeq: 0,
+      otherLastReadSeq: 0,
+      unreadCount: record.unreadCount,
+      isPinned: false,
+      createdAt: new Date(record.createdAt),
+      updatedAt: new Date(record.updatedAt),
+    };
+  }
+
+  /**
+   * 将应用模型转换为数据库记录
+   */
+  static toDbRecord(model: ConversationModel): ConversationDbRecord {
+    return {
+      id: model.id,
+      participantId: model.participantId,
+      lastMessageId: model.lastMessageId || null,
+      lastSeq: model.lastSeq,
+      unreadCount: model.unreadCount,
+      createdAt: model.createdAt.toISOString(),
+      updatedAt: model.updatedAt.toISOString(),
+    };
+  }
+
+  /**
+   * 将应用模型转换为缓存数据
+   */
+  static toCacheData(model: ConversationModel): ConversationCacheData {
+    return {
+      id: model.id,
+      type: model.type,
+      is_pinned: model.isPinned,
+      last_seq: model.lastSeq,
+      last_message: model.lastMessage ? this.messageToCache(model.lastMessage) : undefined,
+      last_message_at: model.updatedAt.toISOString(),
+      unread_count: model.unreadCount,
+      participants: model.participants?.map(p => this.userToCache(p)),
+      my_last_read_seq: model.myLastReadSeq,
+      other_last_read_seq: model.otherLastReadSeq,
+      group: model.group ? this.groupToCache(model.group) : undefined,
+      created_at: model.createdAt.toISOString(),
+      updated_at: model.updatedAt.toISOString(),
+    };
+  }
+
+  /**
+   * 提取会话参与者 ID
+   */
+  private static extractParticipantId(response: ConversationResponse): string {
+    if (response.participants && response.participants.length > 0) {
+      return String(response.participants[0].id || '');
+    }
+    return '';
+  }
+
+  /**
+   * 从详情响应提取参与者 ID
+   */
+  private static extractParticipantIdFromDetail(response: ConversationDetailResponse): string {
+    if (response.participants && response.participants.length > 0) {
+      return String(response.participants[0].id || '');
+    }
+    return '';
+  }
+
+  /**
+   * 映射用户 API 响应
+   */
+  private static mapUserFromApi(user: UserDTO): UserModel {
+    return {
+      id: String(user.id || ''),
+      username: user.username || '',
+      nickname: user.nickname,
+      avatar: user.avatar ?? undefined,
+    };
+  }
+
+  /**
+   * 映射群组 API 响应
+   */
+  private static mapGroupFromApi(group: GroupResponse): GroupModel {
+    // 将数字类型的 join_type 转换为字符串类型
+    // JoinType: 0 = 允许任何人, 1 = 需要审批, 2 = 不允许
+    const mapJoinType = (joinType: number): 'anyone' | 'approval' | 'invite' => {
+      switch (joinType) {
+        case 0: return 'anyone';
+        case 1: return 'approval';
+        case 2: return 'invite';
+        default: return 'approval';
+      }
+    };
+
+    return {
+      id: String(group.id || ''),
+      name: group.name || '',
+      avatar: group.avatar,
+      description: group.description,
+      // GroupResponse 没有 announcement 和 updated_at 字段，使用默认值
+      announcement: undefined,
+      ownerId: String(group.owner_id || ''),
+      memberCount: group.member_count || 0,
+      maxMemberCount: group.max_members || 500,
+      joinType: mapJoinType(group.join_type),
+      isMuted: group.mute_all || false,
+      createdAt: new Date(group.created_at || Date.now()),
+      updatedAt: new Date(group.created_at || Date.now()),
+    };
+  }
+
+  /**
+   * 消息模型转缓存格式
+   */
+  private static messageToCache(message: MessageModel): any {
+    return {
+      id: message.id,
+      conversation_id: message.conversationId,
+      sender_id: message.senderId,
+      content: message.content,
+      message_type: message.type,
+      is_read: message.isRead,
+      created_at: message.createdAt.toISOString(),
+      seq: message.seq,
+      status: message.status,
+      segments: message.segments,
+      reply_to_id: message.replyToId,
+      sender: message.sender ? this.userToCache(message.sender) : undefined,
+    };
+  }
+
+  /**
+   * 用户模型转缓存格式
+   */
+  private static userToCache(user: UserModel): any {
+    return {
+      id: user.id,
+      username: user.username,
+      nickname: user.nickname,
+      avatar: user.avatar,
+    };
+  }
+
+  /**
+   * 群组模型转缓存格式
+   */
+  private static groupToCache(group: GroupModel): any {
+    return {
+      id: group.id,
+      name: group.name,
+      avatar: group.avatar,
+      description: group.description,
+      announcement: group.announcement,
+      owner_id: group.ownerId,
+      member_count: group.memberCount,
+      max_member_count: group.maxMemberCount,
+      join_type: group.joinType,
+      mute_all: group.isMuted,
+      created_at: group.createdAt.toISOString(),
+      updated_at: group.updatedAt.toISOString(),
+    };
+  }
+}