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

Reviewed-on: #5
2026-03-25 20:54:09 +08:00
parent cf466a3959 619f08275c
commit 2014be28c4
222 changed files with 22922 additions and 15835 deletions
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -94,7 +94,7 @@ jobs:
          test "${REMOTE}" = "${LOCAL}"

  build-android-apk:
-    runs-on: ubuntu-latest
+    runs-on: android-builder
    container:
      image: reactnativecommunity/react-native-android:latest
    env:
@@ -104,6 +104,7 @@ jobs:
      NODE_ENV: "production"
      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
@@ -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: |
--- a/.gitignore
+++ b/.gitignore
@@ -51,3 +51,6 @@ dist-android-update.zip
 # Backend
 backend/data/
 backend/logs/
+
+doc/
+docs/
--- a/App.tsx
+++ b/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;
 }
--- a/app.json
+++ b/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",
        {
--- a/app/(app)/(tabs)/_layout.tsx
+++ b/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>
+  );
+}
--- a/app/(app)/(tabs)/apps/_layout.tsx
+++ b/app/(app)/(tabs)/apps/_layout.tsx
@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function AppsStackLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}
--- a/app/(app)/(tabs)/apps/index.tsx
+++ b/app/(app)/(tabs)/apps/index.tsx
@@ -0,0 +1,5 @@
+import { AppsScreen } from '../../../../src/screens/apps';
+
+export default function AppsRoute() {
+  return <AppsScreen />;
+}
--- a/app/(app)/(tabs)/apps/schedule/_layout.tsx
+++ b/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>
+  );
+}
--- a/app/(app)/(tabs)/apps/schedule/course.tsx
+++ b/app/(app)/(tabs)/apps/schedule/course.tsx
@@ -0,0 +1,5 @@
+import { CourseDetailScreen } from '../../../../../src/screens/schedule';
+
+export default function CourseDetailRoute() {
+  return <CourseDetailScreen />;
+}
--- a/app/(app)/(tabs)/apps/schedule/index.tsx
+++ b/app/(app)/(tabs)/apps/schedule/index.tsx
@@ -0,0 +1,5 @@
+import { ScheduleScreen } from '../../../../../src/screens/schedule';
+
+export default function ScheduleRoute() {
+  return <ScheduleScreen />;
+}
--- a/app/(app)/(tabs)/home/_layout.tsx
+++ b/app/(app)/(tabs)/home/_layout.tsx
@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function HomeStackLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}
--- a/app/(app)/(tabs)/home/index.tsx
+++ b/app/(app)/(tabs)/home/index.tsx
@@ -0,0 +1,5 @@
+import { HomeScreen } from '../../../../src/screens/home';
+
+export default function HomeRoute() {
+  return <HomeScreen />;
+}
--- a/app/(app)/(tabs)/home/search.tsx
+++ b/app/(app)/(tabs)/home/search.tsx
@@ -0,0 +1,5 @@
+import { SearchScreen } from '../../../../src/screens/home';
+
+export default function HomeSearchRoute() {
+  return <SearchScreen />;
+}
--- a/app/(app)/(tabs)/messages/_layout.tsx
+++ b/app/(app)/(tabs)/messages/_layout.tsx
@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function MessagesStackLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}
--- a/app/(app)/(tabs)/messages/index.tsx
+++ b/app/(app)/(tabs)/messages/index.tsx
@@ -0,0 +1,5 @@
+import { MessageListScreen } from '../../../../src/screens/message';
+
+export default function MessagesRoute() {
+  return <MessageListScreen />;
+}
--- a/app/(app)/(tabs)/messages/notifications.tsx
+++ b/app/(app)/(tabs)/messages/notifications.tsx
@@ -0,0 +1,5 @@
+import { NotificationsScreen } from '../../../../src/screens/message';
+
+export default function NotificationsRoute() {
+  return <NotificationsScreen />;
+}
--- a/app/(app)/(tabs)/profile/_layout.tsx
+++ b/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>
+  );
+}
--- a/app/(app)/(tabs)/profile/account-security.tsx
+++ b/app/(app)/(tabs)/profile/account-security.tsx
@@ -0,0 +1,5 @@
+import { AccountSecurityScreen } from '../../../../src/screens/profile';
+
+export default function AccountSecurityRoute() {
+  return <AccountSecurityScreen />;
+}
--- a/app/(app)/(tabs)/profile/blocked-users.tsx
+++ b/app/(app)/(tabs)/profile/blocked-users.tsx
@@ -0,0 +1,5 @@
+import { BlockedUsersScreen } from '../../../../src/screens/profile';
+
+export default function BlockedUsersRoute() {
+  return <BlockedUsersScreen />;
+}
--- a/app/(app)/(tabs)/profile/bookmarks.tsx
+++ b/app/(app)/(tabs)/profile/bookmarks.tsx
@@ -0,0 +1,5 @@
+import { ProfileScreen } from '../../../../src/screens/profile';
+
+export default function BookmarksRoute() {
+  return <ProfileScreen />;
+}
--- a/app/(app)/(tabs)/profile/edit-profile.tsx
+++ b/app/(app)/(tabs)/profile/edit-profile.tsx
@@ -0,0 +1,5 @@
+import { EditProfileScreen } from '../../../../src/screens/profile';
+
+export default function EditProfileRoute() {
+  return <EditProfileScreen />;
+}
--- a/app/(app)/(tabs)/profile/index.tsx
+++ b/app/(app)/(tabs)/profile/index.tsx
@@ -0,0 +1,5 @@
+import { ProfileScreen } from '../../../../src/screens/profile';
+
+export default function ProfileRoute() {
+  return <ProfileScreen />;
+}
--- a/app/(app)/(tabs)/profile/my-posts.tsx
+++ b/app/(app)/(tabs)/profile/my-posts.tsx
@@ -0,0 +1,5 @@
+import { ProfileScreen } from '../../../../src/screens/profile';
+
+export default function MyPostsRoute() {
+  return <ProfileScreen />;
+}
--- a/app/(app)/(tabs)/profile/notification-settings.tsx
+++ b/app/(app)/(tabs)/profile/notification-settings.tsx
@@ -0,0 +1,5 @@
+import { NotificationSettingsScreen } from '../../../../src/screens/profile';
+
+export default function NotificationSettingsRoute() {
+  return <NotificationSettingsScreen />;
+}
--- a/app/(app)/(tabs)/profile/settings.tsx
+++ b/app/(app)/(tabs)/profile/settings.tsx
@@ -0,0 +1,5 @@
+import { SettingsScreen } from '../../../../src/screens/profile';
+
+export default function SettingsRoute() {
+  return <SettingsScreen />;
+}
--- a/app/(app)/_layout.tsx
+++ b/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 />;
+}
--- a/app/(app)/_layout.web.tsx
+++ b/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 />;
+}
--- a/app/(app)/chat/[conversationId].tsx
+++ b/app/(app)/chat/[conversationId].tsx
@@ -0,0 +1,5 @@
+import { ChatScreen } from '../../../src/screens/message';
+
+export default function ChatRoute() {
+  return <ChatScreen />;
+}
--- a/app/(app)/chat/private-info.tsx
+++ b/app/(app)/chat/private-info.tsx
@@ -0,0 +1,5 @@
+import { PrivateChatInfoScreen } from '../../../src/screens/message';
+
+export default function PrivateChatInfoRoute() {
+  return <PrivateChatInfoScreen />;
+}
--- a/app/(app)/group/[groupId]/index.tsx
+++ b/app/(app)/group/[groupId]/index.tsx
@@ -0,0 +1,5 @@
+import { GroupInfoScreen } from '../../../../src/screens/message';
+
+export default function GroupInfoRoute() {
+  return <GroupInfoScreen />;
+}
--- a/app/(app)/group/[groupId]/members.tsx
+++ b/app/(app)/group/[groupId]/members.tsx
@@ -0,0 +1,5 @@
+import { GroupMembersScreen } from '../../../../src/screens/message';
+
+export default function GroupMembersRoute() {
+  return <GroupMembersScreen />;
+}
--- a/app/(app)/group/create.tsx
+++ b/app/(app)/group/create.tsx
@@ -0,0 +1,5 @@
+import { CreateGroupScreen } from '../../../src/screens/message';
+
+export default function CreateGroupRoute() {
+  return <CreateGroupScreen />;
+}
--- a/app/(app)/group/invite.tsx
+++ b/app/(app)/group/invite.tsx
@@ -0,0 +1,5 @@
+import GroupInviteDetailScreen from '../../../src/screens/message/GroupInviteDetailScreen';
+
+export default function GroupInviteRoute() {
+  return <GroupInviteDetailScreen />;
+}
--- a/app/(app)/group/join.tsx
+++ b/app/(app)/group/join.tsx
@@ -0,0 +1,5 @@
+import { JoinGroupScreen } from '../../../src/screens/message';
+
+export default function JoinGroupRoute() {
+  return <JoinGroupScreen />;
+}
--- a/app/(app)/group/request.tsx
+++ b/app/(app)/group/request.tsx
@@ -0,0 +1,5 @@
+import GroupRequestDetailScreen from '../../../src/screens/message/GroupRequestDetailScreen';
+
+export default function GroupRequestRoute() {
+  return <GroupRequestDetailScreen />;
+}
--- a/app/(app)/posts/create.tsx
+++ b/app/(app)/posts/create.tsx
@@ -0,0 +1,5 @@
+import { CreatePostScreen } from '../../../src/screens/create';
+
+export default function CreatePostRoute() {
+  return <CreatePostScreen />;
+}
--- a/app/(app)/qrcode/login/[sessionId].tsx
+++ b/app/(app)/qrcode/login/[sessionId].tsx
@@ -0,0 +1,5 @@
+import { QRCodeConfirmScreen } from '../../../../src/screens/auth/QRCodeConfirmScreen';
+
+export default function QrLoginConfirmRoute() {
+  return <QRCodeConfirmScreen />;
+}
--- a/app/(app)/users/[userId]/[type].tsx
+++ b/app/(app)/users/[userId]/[type].tsx
@@ -0,0 +1,5 @@
+import FollowListScreen from '../../../../src/screens/profile/FollowListScreen';
+
+export default function FollowListRoute() {
+  return <FollowListScreen />;
+}
--- a/app/(auth)/_layout.tsx
+++ b/app/(auth)/_layout.tsx
@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function AuthLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}
--- a/app/(auth)/forgot-password.tsx
+++ b/app/(auth)/forgot-password.tsx
@@ -0,0 +1,5 @@
+import { ForgotPasswordScreen } from '../../src/screens/auth';
+
+export default function ForgotPasswordRoute() {
+  return <ForgotPasswordScreen />;
+}
--- a/app/(auth)/login.tsx
+++ b/app/(auth)/login.tsx
@@ -0,0 +1,5 @@
+import { LoginScreen } from '../../src/screens/auth';
+
+export default function LoginRoute() {
+  return <LoginScreen />;
+}
--- a/app/(auth)/register.tsx
+++ b/app/(auth)/register.tsx
@@ -0,0 +1,5 @@
+import { RegisterScreen } from '../../src/screens/auth';
+
+export default function RegisterRoute() {
+  return <RegisterScreen />;
+}
--- a/app/_layout.tsx
+++ b/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>
+  );
+}
--- a/app/index.tsx
+++ b/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" />;
+}
--- a/app/post/[postId].tsx
+++ b/app/post/[postId].tsx
@@ -0,0 +1,5 @@
+import { PostDetailScreen } from '../../src/screens/home';
+
+export default function PostDetailRoute() {
+  return <PostDetailScreen />;
+}
--- a/app/user/[userId].tsx
+++ b/app/user/[userId].tsx
@@ -0,0 +1,5 @@
+import { UserScreen } from '../../src/screens/profile';
+
+export default function UserProfileRoute() {
+  return <UserScreen />;
+}
--- a/docs/OPTIMIZATION_DESIGN.md
+++ b/docs/OPTIMIZATION_DESIGN.md
--- a/index.ts
+++ b/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';
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/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"
--- a/plans/architecture-comparison-report.md
+++ b/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。
--- a/screenshots/after-fix.png
+++ b/screenshots/after-fix.png
--- a/screenshots/test-navigation-fix.png
+++ b/screenshots/test-navigation-fix.png
--- a/src/app-navigation/AppDesktopShell.tsx
+++ b/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>
+  );
+}
--- a/src/app-navigation/AppRouteStack.tsx
+++ b/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 }} />;
+}
--- a/src/components/business/CommentItem.tsx
+++ b/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}>
+      <Text variant="caption" color={colors.text.hint} style={styles.floorPlain}>
        {getFloorText(floorNumber)}
      </Text>
-      </View>
    );
  };

@@ -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;
--- a/src/components/business/NotificationItem.tsx
+++ b/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;
--- a/src/components/business/PostCard.tsx
+++ b/src/components/business/PostCard.tsx
@@ -1,977 +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;
-
-    const handleContainerPress = () => {
-      onPress();
-    };
-
-    const handleImagePress = (e: any) => {
-      e.stopPropagation();
-      onImagePress?.(post.images || [], 0);
-    };
-
-    const handleUserPress = (e: any) => {
-      e.stopPropagation();
-      onUserPress();
-    };
-
-    return (
-      <TouchableOpacity 
-        style={[
-          styles.gridContainer, 
-          !hasImage && styles.gridContainerNoImage,
-          isDesktop && styles.gridContainerDesktop
-        ]} 
-        onPress={handleContainerPress} 
-        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={handleImagePress}
-          >
-            <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={handleUserPress}>
-            <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]);
-
-  const handleContainerPress = () => {
-    onPress();
-  };
-
-  const handleUserPress = (e: any) => {
-    e.stopPropagation();
-    onUserPress();
-  };
-
-  const handleLikePress = (e: any) => {
-    e.stopPropagation();
-    onLike();
-  };
-
-  const handleCommentPress = (e: any) => {
-    e.stopPropagation();
-    onComment();
-  };
-
-  const handleSharePress = (e: any) => {
-    e.stopPropagation();
-    onShare();
-  };
-
-  const handleBookmarkPress = (e: any) => {
-    e.stopPropagation();
-    onBookmark();
-  };
-
-  const handleDeletePress = (e: any) => {
-    e.stopPropagation();
-    handleDelete();
-  };
-
-  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={handleContainerPress}
-      activeOpacity={0.9}
-    >
-      {/* 用户信息 */}
-      <View style={styles.userSection}>
-        <TouchableOpacity onPress={handleUserPress}>
-          <Avatar
-            source={author.avatar}
-            size={avatarSize}
-            name={author.nickname}
-          />
-        </TouchableOpacity>
-        <View style={styles.userInfo}>
-          <View style={styles.userNameRow}>
-            <TouchableOpacity onPress={handleUserPress}>
-              <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={handleDeletePress}
-            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={handleLikePress}>
-            <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={handleCommentPress}>
-            <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={handleSharePress}>
-            <MaterialCommunityIcons
-              name="share-outline"
-              size={isDesktop ? 22 : 19}
-              color={colors.text.secondary}
-            />
-          </TouchableOpacity>
-
-          <TouchableOpacity style={[styles.actionButton, isDesktop && styles.actionButtonWide]} onPress={handleBookmarkPress}>
-            <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;
--- a/src/components/business/PostCard/PostCard.tsx
+++ b/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;
--- a/src/components/business/PostCard/components/PostImages.tsx
+++ b/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;
--- a/src/components/business/PostCard/components/index.ts
+++ b/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';
--- a/src/components/business/PostCard/hooks/index.ts
+++ b/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 {};
--- a/src/components/business/PostCard/index.ts
+++ b/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';
--- a/src/components/business/PostCard/types.ts
+++ b/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;
+}
--- a/src/components/business/QRCodeScanner.tsx
+++ b/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;
--- a/src/components/business/SearchBar.tsx
+++ b/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;
@@ -18,69 +18,8 @@ interface SearchBarProps {
  autoFocus?: boolean;
 }

-const SearchBar: React.FC<SearchBarProps> = ({
-  value,
-  onChangeText,
-  onSubmit,
-  placeholder = '搜索...',
-  onFocus,
-  onBlur,
-  autoFocus = false,
-}) => {
-  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}
-        // 确保光标可见
-        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>
-  );
-};
-
-const styles = StyleSheet.create({
+function createSearchBarStyles(colors: AppColors) {
+  return StyleSheet.create({
    container: {
      flexDirection: 'row',
      alignItems: 'center',
@@ -89,8 +28,7 @@ const styles = StyleSheet.create({
      paddingHorizontal: spacing.xs,
      height: 46,
      borderWidth: 1,
-    borderColor: '#E7E7E7',
-    // 减少常态阴影，避免看起来像"黑框"
+      borderColor: colors.divider,
      shadowColor: 'transparent',
      shadowOffset: { width: 0, height: 0 },
      shadowOpacity: 0,
@@ -98,9 +36,7 @@ const styles = StyleSheet.create({
      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,
@@ -137,5 +73,65 @@ const styles = StyleSheet.create({
      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;
--- a/src/components/business/SystemMessageItem.tsx
+++ b/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 ? (
+          <View style={styles.avatarWrapper}>
            <Avatar
              source={groupAvatar || ''}
-            size={avatarSize}
+              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 ? (
+          <View style={styles.avatarWrapper}>
            <Avatar
              source={operatorAvatar || ''}
-            size={avatarSize}
+              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}>
+          <View style={styles.titleLeft}>
+            <Text
+              variant="body"
+              style={[styles.title, ...(isUnread ? [styles.unreadTitle] : [])]}
+              numberOfLines={1}
+            >
              {title}
            </Text>
-          <Text variant="caption" color={colors.text.secondary} style={styles.time}>
+            {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';
+            const iconName = isCommentType ? 'comment-text-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}>
+                <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} />
--- a/src/components/business/TabBar.tsx
+++ b/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;
--- a/src/components/business/UserProfileHeader.tsx
+++ b/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,
  },
@@ -534,6 +536,7 @@ const styles = StyleSheet.create({
    padding: spacing.sm,
  },
  });
+}

 // 使用 React.memo 避免不必要的重新渲染
 const MemoizedUserProfileHeader = React.memo(UserProfileHeader);
--- a/src/components/business/VoteCard.tsx
+++ b/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';

@@ -28,208 +28,8 @@ interface VoteCardProps {
  compact?: boolean;
 }

-const VoteCard: React.FC<VoteCardProps> = ({
-  options,
-  totalVotes,
-  hasVoted,
-  votedOptionId,
-  onVote,
-  onUnvote,
-  isLoading = false,
-  compact = false,
-}) => {
-  // 动画值
-  const progressAnim = React.useRef(new Animated.Value(0)).current;
-
-  React.useEffect(() => {
-    Animated.timing(progressAnim, {
-      toValue: 1,
-      duration: 400,
-      useNativeDriver: false,
-    }).start();
-  }, [hasVoted, totalVotes]);
-
-  // 计算百分比
-  const calculatePercentage = useCallback((votes: number): number => {
-    if (totalVotes === 0) return 0;
-    return Math.round((votes / totalVotes) * 100);
-  }, [totalVotes]);
-
-  // 格式化票数
-  const formatVoteCount = useCallback((count: number): string => {
-    if (count >= 10000) {
-      return (count / 10000).toFixed(1) + '万';
-    }
-    if (count >= 1000) {
-      return (count / 1000).toFixed(1) + 'k';
-    }
-    return count.toString();
-  }, []);
-
-  // 处理投票
-  const handleVote = useCallback((optionId: string) => {
-    if (isLoading || hasVoted) return;
-    onVote(optionId);
-  }, [isLoading, hasVoted, onVote]);
-
-  // 处理取消投票
-  const handleUnvote = useCallback(() => {
-    if (isLoading || !hasVoted) return;
-    onUnvote();
-  }, [isLoading, hasVoted, onUnvote]);
-
-  // 渲染投票选项
-  const renderOption = useCallback((option: VoteOptionDTO, index: number) => {
-    const isVotedOption = votedOptionId === option.id;
-    const percentage = calculatePercentage(option.votes_count);
-    const showResults = hasVoted;
-
-    return (
-      <View key={option.id} style={styles.optionContainer}>
-        {/* 进度条背景 */}
-        {showResults && (
-          <Animated.View
-            style={[
-              styles.progressBar,
-              {
-                width: progressAnim.interpolate({
-                  inputRange: [0, 1],
-                  outputRange: ['0%', `${percentage}%`],
-                }),
-                backgroundColor: isVotedOption
-                  ? colors.primary.light + '40'
-                  : colors.background.disabled,
-              },
-            ]}
-          />
-        )}
-
-        {/* 选项按钮 */}
-        <TouchableOpacity
-          style={[
-            styles.optionButton,
-            isVotedOption && styles.optionButtonVoted,
-          ]}
-          onPress={() => handleVote(option.id)}
-          disabled={isLoading || hasVoted}
-          activeOpacity={hasVoted ? 1 : 0.8}
-        >
-          {/* 选择指示器 */}
-          <View style={[
-            styles.optionIndicator,
-            isVotedOption && styles.optionIndicatorVoted,
-          ]}>
-            {isVotedOption && (
-              <MaterialCommunityIcons
-                name="check"
-                size={12}
-                color={colors.primary.contrast}
-              />
-            )}
-          </View>
-
-          {/* 选项内容 */}
-          <Text
-            variant={compact ? 'caption' : 'body'}
-            style={compact ? [styles.optionText, styles.optionTextCompact] : styles.optionText}
-            numberOfLines={compact ? 1 : 2}
-          >
-            {option.content}
-          </Text>
-
-          {/* 投票结果 */}
-          {showResults && (
-            <View style={styles.resultContainer}>
-              <Text
-                variant="caption"
-                style={isVotedOption ? [styles.percentage, styles.percentageVoted] : styles.percentage}
-              >
-                {percentage}%
-              </Text>
-            </View>
-          )}
-        </TouchableOpacity>
-      </View>
-    );
-  }, [hasVoted, votedOptionId, calculatePercentage, handleVote, isLoading, progressAnim, compact]);
-
-  // 排序后的选项（已投票的排在前面）
-  const sortedOptions = React.useMemo(() => {
-    if (!hasVoted) return options;
-    return [...options].sort((a, b) => {
-      if (a.id === votedOptionId) return -1;
-      if (b.id === votedOptionId) return 1;
-      return b.votes_count - a.votes_count;
-    });
-  }, [options, hasVoted, votedOptionId]);
-
-  return (
-    <View style={[styles.container, compact && styles.containerCompact]}>
-      {/* 投票图标和标题 */}
-      <View style={styles.header}>
-        <View style={styles.headerIcon}>
-          <MaterialCommunityIcons
-            name="vote"
-            size={compact ? 14 : 16}
-            color={colors.primary.main}
-          />
-        </View>
-        <Text variant={compact ? 'caption' : 'body'} style={styles.headerTitle}>
-          投票
-        </Text>
-      </View>
-
-      {/* 投票选项列表 */}
-      <View style={styles.optionsList}>
-        {sortedOptions.map((option, index) => renderOption(option, index))}
-      </View>
-
-      {/* 底部信息栏 */}
-      <View style={styles.footer}>
-        <View style={styles.footerLeft}>
-          <MaterialCommunityIcons
-            name="account-group-outline"
-            size={14}
-            color={colors.text.hint}
-          />
-          <Text variant="caption" color={colors.text.hint} style={styles.footerText}>
-            {formatVoteCount(totalVotes)} 人参与
-          </Text>
-        </View>
-        
-        {hasVoted && (
-          <TouchableOpacity
-            style={styles.unvoteButton}
-            onPress={handleUnvote}
-            disabled={isLoading}
-          >
-            <MaterialCommunityIcons
-              name="refresh"
-              size={14}
-              color={colors.text.hint}
-            />
-            <Text variant="caption" color={colors.text.hint} style={styles.unvoteText}>
-              重选
-            </Text>
-          </TouchableOpacity>
-        )}
-      </View>
-
-      {/* 加载遮罩 */}
-      {isLoading && (
-        <View style={styles.loadingOverlay}>
-          <MaterialCommunityIcons
-            name="loading"
-            size={24}
-            color={colors.primary.main}
-          />
-        </View>
-      )}
-    </View>
-  );
-};
-
-const styles = StyleSheet.create({
+function createVoteCardStyles(colors: AppColors) {
+  return StyleSheet.create({
    container: {
      backgroundColor: colors.background.paper,
      borderRadius: borderRadius.lg,
@@ -366,5 +166,208 @@ const styles = StyleSheet.create({
      borderRadius: borderRadius.lg,
    },
  });
+}
+
+const VoteCard: React.FC<VoteCardProps> = ({
+  options,
+  totalVotes,
+  hasVoted,
+  votedOptionId,
+  onVote,
+  onUnvote,
+  isLoading = false,
+  compact = false,
+}) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createVoteCardStyles(colors), [colors]);
+  const progressAnim = React.useRef(new Animated.Value(0)).current;
+
+  React.useEffect(() => {
+    Animated.timing(progressAnim, {
+      toValue: 1,
+      duration: 400,
+      useNativeDriver: false,
+    }).start();
+  }, [hasVoted, totalVotes]);
+
+  // 计算百分比
+  const calculatePercentage = useCallback((votes: number): number => {
+    if (totalVotes === 0) return 0;
+    return Math.round((votes / totalVotes) * 100);
+  }, [totalVotes]);
+
+  // 格式化票数
+  const formatVoteCount = useCallback((count: number): string => {
+    if (count >= 10000) {
+      return (count / 10000).toFixed(1) + '万';
+    }
+    if (count >= 1000) {
+      return (count / 1000).toFixed(1) + 'k';
+    }
+    return count.toString();
+  }, []);
+
+  // 处理投票
+  const handleVote = useCallback((optionId: string) => {
+    if (isLoading || hasVoted) return;
+    onVote(optionId);
+  }, [isLoading, hasVoted, onVote]);
+
+  // 处理取消投票
+  const handleUnvote = useCallback(() => {
+    if (isLoading || !hasVoted) return;
+    onUnvote();
+  }, [isLoading, hasVoted, onUnvote]);
+
+  // 渲染投票选项
+  const renderOption = useCallback((option: VoteOptionDTO, index: number) => {
+    const isVotedOption = votedOptionId === option.id;
+    const percentage = calculatePercentage(option.votes_count);
+    const showResults = hasVoted;
+
+    return (
+      <View key={option.id} style={styles.optionContainer}>
+        {/* 进度条背景 */}
+        {showResults && (
+          <Animated.View
+            style={[
+              styles.progressBar,
+              {
+                width: progressAnim.interpolate({
+                  inputRange: [0, 1],
+                  outputRange: ['0%', `${percentage}%`],
+                }),
+                backgroundColor: isVotedOption
+                  ? colors.primary.light + '40'
+                  : colors.background.disabled,
+              },
+            ]}
+          />
+        )}
+
+        {/* 选项按钮 */}
+        <TouchableOpacity
+          style={[
+            styles.optionButton,
+            isVotedOption && styles.optionButtonVoted,
+          ]}
+          onPress={() => handleVote(option.id)}
+          disabled={isLoading || hasVoted}
+          activeOpacity={hasVoted ? 1 : 0.8}
+        >
+          {/* 选择指示器 */}
+          <View style={[
+            styles.optionIndicator,
+            isVotedOption && styles.optionIndicatorVoted,
+          ]}>
+            {isVotedOption && (
+              <MaterialCommunityIcons
+                name="check"
+                size={12}
+                color={colors.primary.contrast}
+              />
+            )}
+          </View>
+
+          {/* 选项内容 */}
+          <Text
+            variant={compact ? 'caption' : 'body'}
+            style={compact ? [styles.optionText, styles.optionTextCompact] : styles.optionText}
+            numberOfLines={compact ? 1 : 2}
+          >
+            {option.content}
+          </Text>
+
+          {/* 投票结果 */}
+          {showResults && (
+            <View style={styles.resultContainer}>
+              <Text
+                variant="caption"
+                style={isVotedOption ? [styles.percentage, styles.percentageVoted] : styles.percentage}
+              >
+                {percentage}%
+              </Text>
+            </View>
+          )}
+        </TouchableOpacity>
+      </View>
+    );
+  }, [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(() => {
+    if (!hasVoted) return options;
+    return [...options].sort((a, b) => {
+      if (a.id === votedOptionId) return -1;
+      if (b.id === votedOptionId) return 1;
+      return b.votes_count - a.votes_count;
+    });
+  }, [options, hasVoted, votedOptionId]);
+
+  return (
+    <View style={[styles.container, compact && styles.containerCompact]}>
+      {/* 投票图标和标题 */}
+      <View style={styles.header}>
+        <View style={styles.headerIcon}>
+          <MaterialCommunityIcons
+            name="vote"
+            size={compact ? 14 : 16}
+            color={colors.primary.main}
+          />
+        </View>
+        <Text variant={compact ? 'caption' : 'body'} style={styles.headerTitle}>
+          投票
+        </Text>
+      </View>
+
+      {/* 投票选项列表 */}
+      <View style={styles.optionsList}>
+        {sortedOptions.map((option, index) => renderOption(option, index))}
+      </View>
+
+      {/* 底部信息栏 */}
+      <View style={styles.footer}>
+        <View style={styles.footerLeft}>
+          <MaterialCommunityIcons
+            name="account-group-outline"
+            size={14}
+            color={colors.text.hint}
+          />
+          <Text variant="caption" color={colors.text.hint} style={styles.footerText}>
+            {formatVoteCount(totalVotes)} 人参与
+          </Text>
+        </View>
+        
+        {hasVoted && (
+          <TouchableOpacity
+            style={styles.unvoteButton}
+            onPress={handleUnvote}
+            disabled={isLoading}
+          >
+            <MaterialCommunityIcons
+              name="refresh"
+              size={14}
+              color={colors.text.hint}
+            />
+            <Text variant="caption" color={colors.text.hint} style={styles.unvoteText}>
+              重选
+            </Text>
+          </TouchableOpacity>
+        )}
+      </View>
+
+      {/* 加载遮罩 */}
+      {isLoading && (
+        <View style={styles.loadingOverlay}>
+          <MaterialCommunityIcons
+            name="loading"
+            size={24}
+            color={colors.primary.main}
+          />
+        </View>
+      )}
+    </View>
+  );
+};

 export default VoteCard;
--- a/src/components/business/VoteEditor.tsx
+++ b/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;
--- a/src/components/business/VotePreview.tsx
+++ b/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;
--- a/src/components/business/index.ts
+++ b/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';
--- a/src/components/common/AppBackButton.tsx
+++ b/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;
--- a/src/components/common/AppDialogHost.tsx
+++ b/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;
--- a/src/components/common/AppPromptBar.tsx
+++ b/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' },
-};
+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 iconColorMap: Record<PromptType, string> = {
+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: Record<PromptType, string> = {
+  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 AppPromptBar: React.FC = () => {
-  const insets = useSafeAreaInsets();
  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;
--- a/src/components/common/Avatar.tsx
+++ b/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;
--- a/src/components/common/Button.tsx
+++ b/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;
--- a/src/components/common/Card.tsx
+++ b/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;
--- a/src/components/common/Divider.tsx
+++ b/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,
      ]}
    />
--- a/src/components/common/EmptyState.tsx
+++ b/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';

@@ -20,121 +20,8 @@ interface EmptyStateProps {
  variant?: 'default' | 'modern' | 'compact';
 }

-const EmptyState: React.FC<EmptyStateProps> = ({
-  icon = 'folder-open-outline',
-  title,
-  description,
-  actionLabel,
-  onAction,
-  style,
-  variant = 'modern',
-}) => {
-  // 现代风格空状态
-  if (variant === 'modern') {
-    return (
-      <View style={[styles.modernContainer, style]}>
-        <View style={styles.illustrationContainer}>
-          <View style={styles.iconBackground}>
-            <MaterialCommunityIcons
-              name={icon as any}
-              size={48}
-              color={colors.primary.main}
-              style={styles.modernIcon}
-            />
-          </View>
-          <View style={styles.decorativeCircle1} />
-          <View style={styles.decorativeCircle2} />
-        </View>
-        <Text
-          variant="h3"
-          color={colors.text.primary}
-          style={styles.modernTitle}
-        >
-          {title}
-        </Text>
-        {description && (
-          <Text
-            variant="body"
-            color={colors.text.secondary}
-            style={styles.modernDescription}
-          >
-            {description}
-          </Text>
-        )}
-        {actionLabel && onAction && (
-          <Button
-            title={actionLabel}
-            onPress={onAction}
-            variant="primary"
-            size="md"
-            style={styles.modernButton}
-          />
-        )}
-      </View>
-    );
-  }
-
-  // 紧凑风格
-  if (variant === 'compact') {
-    return (
-      <View style={[styles.compactContainer, style]}>
-        <MaterialCommunityIcons
-          name={icon as any}
-          size={40}
-          color={colors.text.disabled}
-          style={styles.compactIcon}
-        />
-        <Text
-          variant="body"
-          color={colors.text.secondary}
-          style={styles.compactTitle}
-        >
-          {title}
-        </Text>
-      </View>
-    );
-  }
-
-  // 默认风格
-  return (
-    <View style={[styles.container, style]}>
-      <MaterialCommunityIcons
-        name={icon as any}
-        size={64}
-        color={colors.text.disabled}
-        style={styles.icon}
-      />
-      <Text
-        variant="h3"
-        color={colors.text.secondary}
-        style={styles.title}
-      >
-        {title}
-      </Text>
-      {description && (
-        <Text
-          variant="body"
-          color={colors.text.secondary}
-          style={styles.description}
-        >
-          {description}
-        </Text>
-      )}
-      {actionLabel && onAction && (
-        <Button
-          title={actionLabel}
-          onPress={onAction}
-          variant="outline"
-          size="md"
-          style={styles.button}
-        />
-      )}
-    </View>
-  );
-};
-
-const styles = StyleSheet.create({
-  // 默认风格
+function createEmptyStateStyles(colors: AppColors) {
+  return StyleSheet.create({
    container: {
      flex: 1,
      alignItems: 'center',
@@ -155,8 +42,6 @@ const styles = StyleSheet.create({
    button: {
      minWidth: 120,
    },
-
-  // 现代风格
    modernContainer: {
      flex: 1,
      alignItems: 'center',
@@ -223,8 +108,6 @@ const styles = StyleSheet.create({
      minWidth: 140,
      borderRadius: borderRadius.lg,
    },
-
-  // 紧凑风格
    compactContainer: {
      flexDirection: 'row',
      alignItems: 'center',
@@ -238,5 +121,99 @@ const styles = StyleSheet.create({
      fontSize: fontSizes.md,
    },
  });
+}
+
+const EmptyState: React.FC<EmptyStateProps> = ({
+  icon = 'folder-open-outline',
+  title,
+  description,
+  actionLabel,
+  onAction,
+  style,
+  variant = 'modern',
+}) => {
+  const colors = useAppColors();
+  const styles = useMemo(() => createEmptyStateStyles(colors), [colors]);
+
+  if (variant === 'modern') {
+    return (
+      <View style={[styles.modernContainer, style]}>
+        <View style={styles.illustrationContainer}>
+          <View style={styles.iconBackground}>
+            <MaterialCommunityIcons
+              name={icon as any}
+              size={48}
+              color={colors.primary.main}
+              style={styles.modernIcon}
+            />
+          </View>
+          <View style={styles.decorativeCircle1} />
+          <View style={styles.decorativeCircle2} />
+        </View>
+        <Text variant="h3" color={colors.text.primary} style={styles.modernTitle}>
+          {title}
+        </Text>
+        {description && (
+          <Text variant="body" color={colors.text.secondary} style={styles.modernDescription}>
+            {description}
+          </Text>
+        )}
+        {actionLabel && onAction && (
+          <Button
+            title={actionLabel}
+            onPress={onAction}
+            variant="primary"
+            size="md"
+            style={styles.modernButton}
+          />
+        )}
+      </View>
+    );
+  }
+
+  if (variant === 'compact') {
+    return (
+      <View style={[styles.compactContainer, style]}>
+        <MaterialCommunityIcons
+          name={icon as any}
+          size={40}
+          color={colors.text.disabled}
+          style={styles.compactIcon}
+        />
+        <Text variant="body" color={colors.text.secondary} style={styles.compactTitle}>
+          {title}
+        </Text>
+      </View>
+    );
+  }
+
+  return (
+    <View style={[styles.container, style]}>
+      <MaterialCommunityIcons
+        name={icon as any}
+        size={64}
+        color={colors.text.disabled}
+        style={styles.icon}
+      />
+      <Text variant="h3" color={colors.text.secondary} style={styles.title}>
+        {title}
+      </Text>
+      {description && (
+        <Text variant="body" color={colors.text.secondary} style={styles.description}>
+          {description}
+        </Text>
+      )}
+      {actionLabel && onAction && (
+        <Button
+          title={actionLabel}
+          onPress={onAction}
+          variant="outline"
+          size="md"
+          style={styles.button}
+        />
+      )}
+    </View>
+  );
+};

 export default EmptyState;
--- a/src/components/common/ImageGallery.tsx
+++ b/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',
--- a/src/components/common/ImageGrid.tsx
+++ b/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 (
+    <ImageGridStylesContext.Provider value={gridStyles}>
      <View
-      style={[styles.container, style]}
+        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;
--- a/src/components/common/Input.tsx
+++ b/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;
--- a/src/components/common/Loading.tsx
+++ b/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;
--- a/src/components/common/SearchBar.tsx
+++ b/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;
--- a/src/components/common/SmartImage.tsx
+++ b/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;
--- a/src/components/common/Text.tsx
+++ b/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],
--- a/src/components/common/index.ts
+++ b/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';
--- a/src/core/entities/Post.ts
+++ b/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);
+};
--- a/src/core/usecases/ProcessPostUseCase.ts
+++ b/src/core/usecases/ProcessPostUseCase.ts
--- a/src/data/datasources/ApiDataSource.ts
+++ b/src/data/datasources/ApiDataSource.ts
@@ -72,12 +72,7 @@ export class ApiDataSource implements IApiDataSource {
  async delete<T>(url: string, data?: any): Promise<T> {
    try {
      const fullUrl = this.buildUrl(url);
-      // 处理带 request body 的 DELETE 请求
-      if (data) {
-        const response = await api.request<T>('DELETE', fullUrl, undefined, data);
-        return response.data;
-      }
-      const response = await api.delete<T>(fullUrl);
+      const response = await api.delete<T>(fullUrl, data);
      return response.data;
    } catch (error) {
      this.handleError(error, 'DELETE');
--- a/src/data/datasources/LocalDataSource.ts
+++ b/src/data/datasources/LocalDataSource.ts
@@ -20,6 +20,7 @@ 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
@@ -34,6 +35,21 @@ export class LocalDataSource implements ILocalDataSource {
      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) {
@@ -132,6 +148,12 @@ export class LocalDataSource implements ILocalDataSource {
        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) {
@@ -183,7 +205,10 @@ export class LocalDataSource implements ILocalDataSource {
  async query<T>(sql: string, params?: any[]): Promise<T[]> {
    try {
      const db = this.ensureDb();
-      return await db.getAllAsync<T>(sql, params);
+      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');
    }
@@ -192,7 +217,10 @@ export class LocalDataSource implements ILocalDataSource {
  async getFirst<T>(sql: string, params?: any[]): Promise<T | null> {
    try {
      const db = this.ensureDb();
-      return await db.getFirstAsync<T>(sql, params);
+      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');
    }
@@ -210,8 +238,22 @@ export class LocalDataSource implements ILocalDataSource {
  async run(sql: string, params?: any[]): Promise<{ lastInsertRowId: number; changes: number }> {
    try {
      const db = this.ensureDb();
-      return await db.runAsync(sql, params);
+      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');
    }
  }
--- a/src/data/mappers/ConversationMapper.ts
+++ b/src/data/mappers/ConversationMapper.ts
@@ -212,7 +212,7 @@ export class ConversationMapper {
      id: String(user.id || ''),
      username: user.username || '',
      nickname: user.nickname,
-      avatar: user.avatar,
+      avatar: user.avatar ?? undefined,
    };
  }

@@ -220,19 +220,31 @@ export class ConversationMapper {
   * 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,
-      announcement: group.announcement,
+      // 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_member_count || 500,
-      joinType: group.join_type || 'approval',
+      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.updated_at || Date.now()),
+      updatedAt: new Date(group.created_at || Date.now()),
    };
  }

--- a/src/data/mappers/MessageMapper.ts
+++ b/src/data/mappers/MessageMapper.ts
@@ -32,13 +32,16 @@ export class MessageMapper {
   * 将 API 响应转换为应用模型
   */
  static fromApiResponse(response: MessageResponse): MessageModel {
+    const textSegment = response.segments?.find(s => s.type === 'text');
+    const content = textSegment?.data?.text || textSegment?.data?.content || '';
+    
    return {
      id: String(response.id || ''),
      conversationId: String(response.conversation_id || ''),
      senderId: String(response.sender_id || ''),
-      content: response.content || '',
-      type: response.message_type || 'text',
-      isRead: response.is_read || false,
+      content,
+      type: 'text',
+      isRead: false,
      createdAt: new Date(response.created_at || Date.now()),
      seq: response.seq || 0,
      status: response.status || 'normal',
@@ -169,15 +172,12 @@ export class MessageMapper {
    }
  }

-  /**
-   * 映射发送者信息
-   */
  private static mapSenderFromApi(sender: UserDTO): UserModel {
    return {
      id: String(sender.id || ''),
      username: sender.username || '',
      nickname: sender.nickname,
-      avatar: sender.avatar,
+      avatar: sender.avatar || undefined,
    };
  }
 }
--- a/src/data/mappers/PostMapper.ts
+++ b/src/data/mappers/PostMapper.ts
@@ -4,40 +4,46 @@
 */

 import { PostModel, UserModel } from '../models';
-import type { Post } from '../../types';
+import type { PostDTO } from '../../types/dto';

 export class PostMapper {
-  /**
-   * 将 API 响应转换为应用模型
-   */
-  static fromApiResponse(response: Post): PostModel {
+  static fromApiResponse(response: PostDTO): PostModel {
    return {
      id: String(response.id || ''),
-      authorId: String(response.author_id || ''),
+      authorId: String(response.user_id || ''),
      author: response.author ? this.mapAuthorFromApi(response.author) : undefined,
      title: response.title || '',
      content: response.content || '',
-      images: response.images || [],
-      likeCount: response.like_count || 0,
-      commentCount: response.comment_count || 0,
-      shareCount: response.share_count || 0,
-      viewCount: response.view_count || 0,
-      favoriteCount: response.favorite_count || 0,
+      images: response.images?.map(img => img.url) || [],
+      likeCount: response.likes_count || 0,
+      commentCount: response.comments_count || 0,
+      shareCount: response.shares_count || 0,
+      viewCount: response.views_count || 0,
+      favoriteCount: response.favorites_count || 0,
      isLiked: response.is_liked || false,
      isFavorited: response.is_favorited || false,
-      isTop: response.is_top || false,
-      status: response.status || 'published',
-      communityId: response.community_id,
-      tags: response.tags || [],
+      isTop: response.is_pinned || false,
+      status: (response.status || 'published') as 'published' | 'draft' | 'deleted',
+      channelId: response.channel_id,
+      channel:
+        response.channel && response.channel.id
+          ? { id: String(response.channel.id), name: String(response.channel.name || '') }
+          : undefined,
+      tags: [],
      createdAt: new Date(response.created_at || Date.now()),
-      updatedAt: new Date(response.updated_at || Date.now()),
+      // 空字符串/缺省时用 created_at，避免误用 Date.now() 导致全部显示「刚修改」
+      updatedAt: new Date(
+        response.updated_at ||
+          response.created_at ||
+          Date.now()
+      ),
    };
  }

  /**
   * 将 API 响应数组转换为应用模型数组
   */
-  static fromApiResponseList(responses: Post[]): PostModel[] {
+  static fromApiResponseList(responses: PostDTO[]): PostModel[] {
    return responses.map(r => this.fromApiResponse(r));
  }

@@ -56,8 +62,8 @@ export class PostMapper {
    if (model.images !== undefined) {
      request.images = model.images;
    }
-    if (model.communityId !== undefined) {
-      request.community_id = model.communityId;
+    if (model.channelId !== undefined) {
+      request.channel_id = model.channelId;
    }
    if (model.tags !== undefined) {
      request.tags = model.tags;
@@ -73,7 +79,7 @@ export class PostMapper {
    title: string,
    content: string,
    images?: string[],
-    communityId?: string
+    channelId?: string
  ): Record<string, any> {
    const request: Record<string, any> = {
      title,
@@ -82,8 +88,8 @@ export class PostMapper {
    if (images && images.length > 0) {
      request.images = images;
    }
-    if (communityId) {
-      request.community_id = communityId;
+    if (channelId) {
+      request.channel_id = channelId;
    }
    return request;
  }
--- a/src/data/mappers/UserMapper.ts
+++ b/src/data/mappers/UserMapper.ts
@@ -4,7 +4,7 @@
 */

 import { UserModel } from '../models';
-import type { UserDTO, User } from '../../types/dto';
+import type { UserDTO } from '../../types/dto';

 // 数据库用户记录类型
 export interface UserDbRecord {
@@ -14,9 +14,6 @@ export interface UserDbRecord {
 }

 export class UserMapper {
-  /**
-   * 将 API DTO 转换为应用模型
-   */
  static fromDTO(dto: UserDTO): UserModel {
    return {
      id: String(dto.id || ''),
@@ -32,39 +29,10 @@ export class UserMapper {
      followingCount: dto.following_count,
      postsCount: dto.posts_count,
      isFollowing: dto.is_following,
-      isBlocked: dto.is_blocked,
      createdAt: dto.created_at ? new Date(dto.created_at) : undefined,
-      updatedAt: dto.updated_at ? new Date(dto.updated_at) : undefined,
    };
  }

-  /**
-   * 将 User 类型转换为应用模型
-   */
-  static fromUser(user: User): UserModel {
-    return {
-      id: String(user.id || ''),
-      username: user.username || '',
-      nickname: user.nickname,
-      avatar: user.avatar,
-      bio: user.bio,
-      website: user.website,
-      location: user.location,
-      email: user.email,
-      phone: user.phone,
-      followersCount: user.followers_count,
-      followingCount: user.following_count,
-      postsCount: user.posts_count,
-      isFollowing: user.is_following,
-      isBlocked: user.is_blocked,
-      createdAt: user.created_at ? new Date(user.created_at) : undefined,
-      updatedAt: user.updated_at ? new Date(user.updated_at) : undefined,
-    };
-  }
-
-  /**
-   * 将 DTO 数组转换为应用模型数组
-   */
  static fromDTOList(dtos: UserDTO[]): UserModel[] {
    return dtos.map(dto => this.fromDTO(dto));
  }
@@ -88,20 +56,19 @@ export class UserMapper {
    const dto: UserDTO = {
      id: model.id,
      username: model.username,
-      nickname: model.nickname,
-      avatar: model.avatar,
-      bio: model.bio,
-      website: model.website,
-      location: model.location,
+      nickname: model.nickname || '',
+      avatar: model.avatar || '',
+      cover_url: '',
+      bio: model.bio || '',
+      website: model.website || '',
+      location: model.location || '',
      email: model.email,
      phone: model.phone,
-      followers_count: model.followersCount,
-      following_count: model.followingCount,
-      posts_count: model.postsCount,
+      followers_count: model.followersCount || 0,
+      following_count: model.followingCount || 0,
+      posts_count: model.postsCount || 0,
      is_following: model.isFollowing,
-      is_blocked: model.isBlocked,
-      created_at: model.createdAt?.toISOString(),
-      updated_at: model.updatedAt?.toISOString(),
+      created_at: model.createdAt?.toISOString() || '',
    };

    return {
@@ -149,20 +116,19 @@ export class UserMapper {
    return {
      id: model.id,
      username: model.username,
-      nickname: model.nickname,
-      avatar: model.avatar,
-      bio: model.bio,
-      website: model.website,
-      location: model.location,
+      nickname: model.nickname || '',
+      avatar: model.avatar || '',
+      cover_url: '',
+      bio: model.bio || '',
+      website: model.website || '',
+      location: model.location || '',
      email: model.email,
      phone: model.phone,
-      followers_count: model.followersCount,
-      following_count: model.followingCount,
-      posts_count: model.postsCount,
+      followers_count: model.followersCount || 0,
+      following_count: model.followingCount || 0,
+      posts_count: model.postsCount || 0,
      is_following: model.isFollowing,
-      is_blocked: model.isBlocked,
-      created_at: model.createdAt?.toISOString(),
-      updated_at: model.updatedAt?.toISOString(),
+      created_at: model.createdAt?.toISOString() || '',
    };
  }
 }
--- a/src/data/models/index.ts
+++ b/src/data/models/index.ts
@@ -85,7 +85,9 @@ export interface PostModel {
  isFavorited: boolean;
  isTop: boolean;
  status: 'published' | 'draft' | 'deleted';
-  communityId?: string;
+  channelId?: string;
+  /** 频道展示用（与 PostDTO.channel 一致） */
+  channel?: { id: string; name: string } | null;
  tags?: string[];
  createdAt: Date;
  updatedAt: Date;
--- a/src/data/repositories/PostRepository.ts
+++ b/src/data/repositories/PostRepository.ts
@@ -0,0 +1,579 @@
+/**
+ * PostRepository - 帖子仓库实现
+ * 实现IPostRepository接口，封装帖子相关的数据访问逻辑
+ */
+
+import { ApiDataSource, apiDataSource } from '../datasources/ApiDataSource';
+import { LocalDataSource, localDataSource } from '../datasources/LocalDataSource';
+import { PostMapper } from '../mappers/PostMapper';
+import type { Post, PostImage, PostStatus } from '../../core/entities/Post';
+import { createPost } from '../../core/entities/Post';
+import type {
+  IPostRepository,
+  GetPostsParams,
+  CreatePostData,
+  UpdatePostData,
+  PostsResult,
+  SearchPostsParams,
+} from './interfaces/IPostRepository';
+
+// ==================== 类型定义 ====================
+
+/**
+ * API帖子响应类型
+ */
+interface PostApiResponse {
+  id: number;
+  user_id: number;
+  title: string;
+  content: string;
+  images?: Array<{ url: string; width?: number; height?: number; thumbnail_url?: string }>;
+  likes_count: number;
+  comments_count: number;
+  shares_count: number;
+  views_count: number;
+  favorites_count: number;
+  is_liked: boolean;
+  is_favorited: boolean;
+  is_pinned: boolean;
+  status: string;
+  channel_id?: string;
+  tags?: string[];
+  created_at: string;
+  updated_at: string;
+  content_edited_at?: string;
+  channel?: { id: string; name: string } | null;
+  author?: {
+    id: number;
+    username: string;
+    nickname?: string;
+    avatar?: string;
+    is_following?: boolean;
+    is_following_me?: boolean;
+  };
+}
+
+/**
+ * API帖子列表响应类型
+ */
+interface PostsListApiResponse {
+  list: PostApiResponse[];
+  has_more?: boolean;
+  next_cursor?: string;
+  total?: number;
+  page?: number;
+  page_size?: number;
+  total_pages?: number;
+}
+
+/**
+ * 缓存的帖子数据
+ */
+interface CachedPost {
+  id: string;
+  data: string;
+  updatedAt: string;
+}
+
+// ==================== PostRepository 实现 ====================
+
+export class PostRepository implements IPostRepository {
+  private api: ApiDataSource;
+  private localDb: LocalDataSource;
+  private memoryCache: Map<string, { post: Post; timestamp: number }> = new Map();
+  private readonly CACHE_TTL = 5 * 60 * 1000; // 5分钟缓存过期时间
+
+  constructor(api: ApiDataSource, localDb: LocalDataSource) {
+    this.api = api;
+    this.localDb = localDb;
+  }
+
+  // ==================== 私有辅助方法 ====================
+
+  /**
+   * 将API响应转换为领域实体
+   * 同时设置 camelCase 和 snake_case 字段以保持向后兼容
+   */
+  private mapToPost(response: PostApiResponse): Post {
+    const model = PostMapper.fromApiResponse(response as any);
+    return {
+      // camelCase 字段（新标准）
+      id: model.id,
+      authorId: model.authorId,
+      author: model.author ? {
+        id: model.author.id,
+        username: model.author.username,
+        nickname: model.author.nickname,
+        avatar: model.author.avatar,
+        // 关注关系直接透传 API 字段，供详情页关注按钮状态使用
+        is_following: response.author?.is_following,
+        is_following_me: response.author?.is_following_me,
+      } : undefined,
+      title: model.title,
+      content: model.content,
+      images: (model.images || []).map(url => ({
+        url,
+        width: undefined,
+        height: undefined,
+      })) as PostImage[],
+      likesCount: model.likeCount,
+      commentsCount: model.commentCount,
+      sharesCount: model.shareCount,
+      viewsCount: model.viewCount,
+      favoritesCount: model.favoriteCount,
+      isLiked: model.isLiked,
+      isFavorited: model.isFavorited,
+      isPinned: model.isTop,
+      status: model.status,
+      channelId: model.channelId,
+      channel: model.channel,
+      tags: model.tags || [],
+      createdAt: model.createdAt.toISOString(),
+      updatedAt: model.updatedAt.toISOString(),
+      contentEditedAt: response.content_edited_at,
+      
+      // snake_case 字段（向后兼容）
+      likes_count: model.likeCount,
+      comments_count: model.commentCount,
+      favorites_count: model.favoriteCount,
+      shares_count: model.shareCount,
+      views_count: model.viewCount,
+      is_liked: model.isLiked,
+      is_favorited: model.isFavorited,
+      is_pinned: model.isTop,
+      user_id: model.authorId,
+      created_at: model.createdAt.toISOString(),
+      updated_at: model.updatedAt.toISOString(),
+      content_edited_at: response.content_edited_at,
+      channel_id: model.channelId,
+    };
+  }
+
+  /**
+   * 从内存缓存获取帖子
+   */
+  private getFromMemoryCache(id: string): Post | null {
+    const cached = this.memoryCache.get(id);
+    if (!cached) return null;
+
+    // 检查缓存是否过期
+    if (Date.now() - cached.timestamp > this.CACHE_TTL) {
+      this.memoryCache.delete(id);
+      return null;
+    }
+
+    return cached.post;
+  }
+
+  /**
+   * 保存帖子到内存缓存
+   */
+  private saveToMemoryCache(post: Post): void {
+    this.memoryCache.set(post.id, {
+      post,
+      timestamp: Date.now(),
+    });
+  }
+
+  /**
+   * 从本地数据库获取缓存的帖子
+   */
+  private async getFromLocalCache(id: string): Promise<Post | null> {
+    try {
+      await this.localDb.initialize();
+      const result = await this.localDb.getFirst<CachedPost>(
+        'SELECT * FROM posts_cache WHERE id = ?',
+        [id]
+      );
+
+      if (!result) return null;
+
+      const post = JSON.parse(result.data) as Post;
+      return post;
+    } catch (error) {
+      console.error('[PostRepository] 获取本地缓存失败:', error);
+      return null;
+    }
+  }
+
+  /**
+   * 保存帖子到本地缓存
+   */
+  private async saveToLocalCache(post: Post): Promise<void> {
+    try {
+      await this.localDb.initialize();
+      await this.localDb.enqueueWrite(async () => {
+        await this.localDb.run(
+          `INSERT OR REPLACE INTO posts_cache (id, data, updatedAt) VALUES (?, ?, ?)`,
+          [post.id, JSON.stringify(post), new Date().toISOString()]
+        );
+      });
+    } catch (error) {
+      console.error('[PostRepository] 保存本地缓存失败:', error);
+    }
+  }
+
+  /**
+   * 清除帖子的本地缓存
+   */
+  private async clearLocalCache(id: string): Promise<void> {
+    try {
+      await this.localDb.initialize();
+      await this.localDb.enqueueWrite(async () => {
+        await this.localDb.run('DELETE FROM posts_cache WHERE id = ?', [id]);
+      });
+    } catch (error) {
+      console.error('[PostRepository] 清除本地缓存失败:', error);
+    }
+  }
+
+  /**
+   * 处理错误
+   */
+  private handleError(error: unknown, operation: string): never {
+    const message = error instanceof Error ? error.message : 'Unknown error';
+    console.error(`[PostRepository] ${operation} 失败:`, error);
+    throw new Error(`帖子${operation}失败: ${message}`);
+  }
+
+  // ==================== 帖子查询 ====================
+
+  /**
+   * 获取帖子列表
+   */
+  async getPosts(params?: GetPostsParams): Promise<PostsResult> {
+    try {
+      const queryParams: Record<string, any> = {};
+
+      if (params?.page !== undefined) queryParams.page = params.page;
+      if (params?.pageSize) queryParams.page_size = params.pageSize;
+      // 支持 cursor 参数：空字符串也传递，用于启动 cursor 模式
+      if (params?.cursor !== undefined && params?.cursor !== null) {
+        queryParams.cursor = params.cursor;
+      }
+      if (params?.post_type) queryParams.tab = params.post_type;
+      if (params?.channelId) queryParams.channel_id = params.channelId;
+      if (params?.authorId) queryParams.author_id = params.authorId;
+      if (params?.tags && params.tags.length > 0) queryParams.tags = params.tags.join(',');
+      if (params?.status) queryParams.status = params.status;
+      if (params?.sortBy) queryParams.sort_by = params.sortBy;
+      if (params?.sortOrder) queryParams.sort_order = params.sortOrder;
+      if (params?.pinnedOnly) queryParams.pinned_only = true;
+
+      const response = await this.api.get<PostsListApiResponse>('/posts', queryParams);
+
+      const posts = (response.list || []).map(p => this.mapToPost(p));
+
+      // 缓存帖子
+      for (const post of posts) {
+        this.saveToMemoryCache(post);
+        // 不等待本地缓存写入完成，避免阻塞 UI
+        this.saveToLocalCache(post).catch(err => {
+          console.warn('[PostRepository] 缓存帖子失败:', post.id, err);
+        });
+      }
+
+      // 计算 hasMore：优先使用 has_more，否则通过 page/total_pages 计算
+      let hasMore = response.has_more;
+      if (hasMore === undefined && response.page !== undefined && response.total_pages !== undefined) {
+        hasMore = response.page < response.total_pages;
+      }
+      hasMore = hasMore ?? false;
+
+      return {
+        posts,
+        hasMore,
+        nextCursor: response.next_cursor,
+        total: response.total,
+      };
+    } catch (error) {
+      this.handleError(error, '获取帖子列表');
+    }
+  }
+
+  /**
+   * 获取单个帖子详情
+   */
+  async getPostById(id: string): Promise<Post | null> {
+    try {
+      // 详情页优先取最新服务端数据，避免旧缓存导致关注态等关系字段过期
+      const response = await this.api.get<PostApiResponse>(`/posts/${id}`);
+      const post = this.mapToPost(response);
+
+      // 更新缓存
+      this.saveToMemoryCache(post);
+      await this.saveToLocalCache(post);
+
+      return post;
+    } catch (error) {
+      // API失败时再回退缓存，保证离线/弱网可用
+      const memoryCached = this.getFromMemoryCache(id);
+      if (memoryCached) {
+        console.warn('[PostRepository] API获取失败，使用内存缓存:', error);
+        return memoryCached;
+      }
+      const localCached = await this.getFromLocalCache(id);
+      if (localCached) {
+        console.warn('[PostRepository] API获取失败，使用本地缓存:', error);
+        this.saveToMemoryCache(localCached);
+        return localCached;
+      }
+      this.handleError(error, '获取帖子详情');
+    }
+  }
+
+  /**
+   * 获取用户发布的帖子列表
+   */
+  async getPostsByUser(userId: string, params?: GetPostsParams): Promise<PostsResult> {
+    try {
+      const queryParams: Record<string, any> = { author_id: userId };
+
+      if (params?.page) queryParams.page = params.page;
+      if (params?.pageSize) queryParams.page_size = params.pageSize;
+      if (params?.cursor) queryParams.cursor = params.cursor;
+      if (params?.status) queryParams.status = params.status;
+      if (params?.sortBy) queryParams.sort_by = params.sortBy;
+      if (params?.sortOrder) queryParams.sort_order = params.sortOrder;
+
+      const response = await this.api.get<PostsListApiResponse>(`/users/${userId}/posts`, queryParams);
+
+      const posts = (response.list || []).map(p => this.mapToPost(p));
+
+      // 缓存帖子
+      for (const post of posts) {
+        this.saveToMemoryCache(post);
+        this.saveToLocalCache(post).catch(err => {
+          console.warn('[PostRepository] 缓存帖子失败:', post.id, err);
+        });
+      }
+
+      return {
+        posts,
+        hasMore: response.has_more ?? false,
+        nextCursor: response.next_cursor,
+        total: response.total,
+      };
+    } catch (error) {
+      this.handleError(error, '获取用户帖子列表');
+    }
+  }
+
+  /**
+   * 搜索帖子
+   */
+  async searchPosts(params: SearchPostsParams): Promise<PostsResult> {
+    try {
+      const queryParams: Record<string, any> = {
+        keyword: params.keyword,
+      };
+
+      if (params.page) queryParams.page = params.page;
+      if (params.pageSize) queryParams.page_size = params.pageSize;
+      if (params.scope) queryParams.scope = params.scope;
+      if (params.channelId) queryParams.channel_id = params.channelId;
+
+      const response = await this.api.get<PostsListApiResponse>('/posts/search', queryParams);
+
+      const posts = (response.list || []).map(p => this.mapToPost(p));
+
+      // 缓存帖子
+      for (const post of posts) {
+        this.saveToMemoryCache(post);
+        this.saveToLocalCache(post).catch(err => {
+          console.warn('[PostRepository] 缓存帖子失败:', post.id, err);
+        });
+      }
+
+      return {
+        posts,
+        hasMore: response.has_more ?? false,
+        nextCursor: response.next_cursor,
+        total: response.total,
+      };
+    } catch (error) {
+      this.handleError(error, '搜索帖子');
+    }
+  }
+
+  // ==================== 帖子操作 ====================
+
+  /**
+   * 创建帖子
+   */
+  async createPost(data: CreatePostData): Promise<Post> {
+    try {
+      const requestData = PostMapper.createPostRequest(
+        data.title,
+        data.content,
+        data.images?.map(img => img.url),
+        data.channelId
+      );
+
+      if (data.tags && data.tags.length > 0) {
+        requestData.tags = data.tags;
+      }
+
+      if (data.status) {
+        requestData.status = data.status;
+      }
+
+      const response = await this.api.post<PostApiResponse>('/posts', requestData);
+      const post = this.mapToPost(response);
+
+      // 缓存新创建的帖子
+      this.saveToMemoryCache(post);
+      await this.saveToLocalCache(post);
+
+      return post;
+    } catch (error) {
+      this.handleError(error, '创建帖子');
+    }
+  }
+
+  /**
+   * 更新帖子
+   */
+  async updatePost(id: string, data: UpdatePostData): Promise<Post> {
+    try {
+      const requestData: Record<string, any> = {};
+
+      if (data.title !== undefined) requestData.title = data.title;
+      if (data.content !== undefined) requestData.content = data.content;
+      if (data.images !== undefined) requestData.images = data.images.map(img => img.url);
+      if (data.tags !== undefined) requestData.tags = data.tags;
+      if (data.status !== undefined) requestData.status = data.status;
+      if (data.isPinned !== undefined) requestData.is_pinned = data.isPinned;
+
+      const response = await this.api.put<PostApiResponse>(`/posts/${id}`, requestData);
+      const post = this.mapToPost(response);
+
+      // 更新缓存
+      this.saveToMemoryCache(post);
+      await this.saveToLocalCache(post);
+
+      return post;
+    } catch (error) {
+      this.handleError(error, '更新帖子');
+    }
+  }
+
+  /**
+   * 删除帖子
+   */
+  async deletePost(id: string): Promise<void> {
+    try {
+      await this.api.delete(`/posts/${id}`);
+
+      // 清除缓存
+      this.memoryCache.delete(id);
+      await this.clearLocalCache(id);
+    } catch (error) {
+      this.handleError(error, '删除帖子');
+    }
+  }
+
+  // ==================== 互动操作 ====================
+
+  /**
+   * 点赞帖子
+   */
+  async likePost(id: string): Promise<Post> {
+    try {
+      const response = await this.api.post<PostApiResponse>(`/posts/${id}/like`);
+      const post = this.mapToPost(response);
+
+      // 更新缓存
+      this.saveToMemoryCache(post);
+      await this.saveToLocalCache(post);
+
+      return post;
+    } catch (error) {
+      this.handleError(error, '点赞帖子');
+    }
+  }
+
+  /**
+   * 取消点赞
+   */
+  async unlikePost(id: string): Promise<Post> {
+    try {
+      const response = await this.api.delete<PostApiResponse>(`/posts/${id}/like`);
+      const post = this.mapToPost(response);
+
+      // 更新缓存
+      this.saveToMemoryCache(post);
+      await this.saveToLocalCache(post);
+
+      return post;
+    } catch (error) {
+      this.handleError(error, '取消点赞');
+    }
+  }
+
+  /**
+   * 收藏帖子
+   */
+  async favoritePost(id: string): Promise<Post> {
+    try {
+      const response = await this.api.post<PostApiResponse>(`/posts/${id}/favorite`);
+      const post = this.mapToPost(response);
+
+      // 更新缓存
+      this.saveToMemoryCache(post);
+      await this.saveToLocalCache(post);
+
+      return post;
+    } catch (error) {
+      this.handleError(error, '收藏帖子');
+    }
+  }
+
+  /**
+   * 取消收藏
+   */
+  async unfavoritePost(id: string): Promise<Post> {
+    try {
+      const response = await this.api.delete<PostApiResponse>(`/posts/${id}/favorite`);
+      const post = this.mapToPost(response);
+
+      // 更新缓存
+      this.saveToMemoryCache(post);
+      await this.saveToLocalCache(post);
+
+      return post;
+    } catch (error) {
+      this.handleError(error, '取消收藏');
+    }
+  }
+
+  // ==================== 缓存管理 ====================
+
+  /**
+   * 清除所有缓存
+   */
+  async clearAllCache(): Promise<void> {
+    this.memoryCache.clear();
+    try {
+      await this.localDb.initialize();
+      await this.localDb.enqueueWrite(async () => {
+        await this.localDb.run('DELETE FROM posts_cache');
+      });
+    } catch (error) {
+      console.error('[PostRepository] 清除所有缓存失败:', error);
+    }
+  }
+
+  /**
+   * 使指定帖子的缓存失效
+   */
+  async invalidateCache(id: string): Promise<void> {
+    this.memoryCache.delete(id);
+    await this.clearLocalCache(id);
+  }
+}
+
+// ==================== 单例导出 ====================
+
+export const postRepository = new PostRepository(apiDataSource, localDataSource);
+export default postRepository;
--- a/src/data/repositories/interfaces/IMessageRepository.ts
+++ b/src/data/repositories/interfaces/IMessageRepository.ts
@@ -3,7 +3,7 @@
 * 定义消息数据访问的抽象
 */

-import type { Message, Conversation, ConversationType } from '../../types/dto';
+import type { Message, Conversation } from '../../../core/entities/Message';

 export interface IMessageRepository {
  // ==================== 消息操作 ====================
--- a/Show More
+++ b/Show More