feat(APKUpdate): implement APK update check and enhance build workflow

- Added `expo-intent-launcher` dependency to support APK launching functionality.
- Introduced `APKUpdateBootstrap` component to check for APK updates during app initialization.
- Enhanced build workflow in `build.yml` to resolve runtime version and upload APK to the updates server.
- Updated `HomeScreen` and `TabsLayout` to manage tab visibility and scroll behavior based on user interactions.
- Refactored message bubble styles for improved UI consistency and user experience.

.gitea/workflows/build.yml

@@ -272,6 +272,42 @@ jobs:
           name: carrot-bbs-android-release-apk
           path: android/app/build/outputs/apk/release/app-release.apk
 
+      - name: Resolve runtime version
+        id: runtime
+        run: |
+          RUNTIME_VERSION="$(node -p "require('./app.json').expo.version")"
+          echo "runtime_version=${RUNTIME_VERSION}" >> "$GITHUB_OUTPUT"
+          echo "Resolved runtimeVersion: ${RUNTIME_VERSION}"
+
+      - name: Upload APK to Updates Server
+        env:
+          OTA_AUTH_TOKEN: ${{ secrets.OTA_AUTH_TOKEN }}
+          UPDATES_SERVER_URL: https://updates.littlelan.cn
+        run: |
+          test -n "${OTA_AUTH_TOKEN}" || (echo "Missing secret OTA_AUTH_TOKEN" && exit 1)
+          
+          APK_PATH="android/app/build/outputs/apk/release/app-release.apk"
+          RUNTIME_VERSION="${{ steps.runtime.outputs.runtime_version }}"
+          
+          echo "Uploading APK for runtime version: ${RUNTIME_VERSION}"
+          
+          HTTP_CODE=$(curl -s -o response.json -w "%{http_code}" \
+            -X POST \
+            "${UPDATES_SERVER_URL}/admin/apk/upload?runtimeVersion=${RUNTIME_VERSION}" \
+            -H "Authorization: Bearer ${OTA_AUTH_TOKEN}" \
+            -H "Content-Type: application/vnd.android.package-archive" \
+            --data-binary @"${APK_PATH}")
+          
+          echo "HTTP Response Code: ${HTTP_CODE}"
+          cat response.json
+          
+          if [ "${HTTP_CODE}" -ne 200 ]; then
+            echo "Failed to upload APK"
+            exit 1
+          fi
+          
+          echo "APK uploaded successfully!"
+
   build-and-push-web:
     runs-on: ubuntu-latest
     permissions:

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

@@ -1,4 +1,4 @@
-import { useMemo } from 'react';
+import { useMemo, useCallback } from 'react';
 import { Platform, useWindowDimensions } from 'react-native';
 import { Tabs, usePathname } from 'expo-router';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
@@ -6,7 +6,7 @@ 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';
+import { useHomeTabBarVisibilityStore, useTotalUnreadCount, useHomeTabPressStore } from '../../../src/stores';
 
 const TAB_BAR_HEIGHT = 56;
 const TAB_BAR_FLOATING_MARGIN = 12;
@@ -19,10 +19,17 @@ export default function TabsLayout() {
   const pathname = usePathname();
   const unreadCount = useTotalUnreadCount();
   const scrollHideTabBar = useHomeTabBarVisibilityStore((s) => s.bottomTabBarHiddenByScroll);
+  const triggerHomeTabPress = useHomeTabPressStore((s) => s.triggerPress);
   const hideTabBar = Platform.OS === 'web' && width >= BREAKPOINTS.desktop;
 
   const isHomeStackRoute = pathname === '/home' || pathname.startsWith('/home/');
 
+  const handleHomeTabPress = useCallback(() => {
+    if (pathname === '/home') {
+      triggerHomeTabPress();
+    }
+  }, [pathname, triggerHomeTabPress]);
+
   const tabBarStyle = useMemo(() => {
     if (hideTabBar) {
       return { display: 'none' as const, height: 0, overflow: 'hidden' as const };
@@ -81,6 +88,9 @@ export default function TabsLayout() {
             />
           ),
         }}
+        listeners={{
+          tabPress: handleHomeTabPress,
+        }}
       />
       <Tabs.Screen
         name="apps"

app/_layout.tsx

@@ -21,6 +21,7 @@ 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';
+import { checkForAPKUpdate } from '../src/services/apkUpdateService';
 
 registerNotificationPresentationHandler();
 
@@ -137,6 +138,26 @@ function NotificationBootstrap() {
   return null;
 }
 
+function APKUpdateBootstrap() {
+  const hasChecked = useRef(false);
+
+  useEffect(() => {
+    if (hasChecked.current) return;
+    hasChecked.current = true;
+
+    // 延迟执行，避免与启动流程冲突
+    const timer = setTimeout(() => {
+      checkForAPKUpdate().catch((error) => {
+        console.error('APK update check failed:', error);
+      });
+    }, 3000);
+
+    return () => clearTimeout(timer);
+  }, []);
+
+  return null;
+}
+
 function ThemedStack() {
   const router = useRouter();
   const colors = useAppColors();
@@ -148,6 +169,7 @@ function ThemedStack() {
       <SystemChrome />
       <SessionGate>
         <NotificationBootstrap />
+        <APKUpdateBootstrap />
         <Stack screenOptions={{ headerShown: false }}>
           <Stack.Screen name="index" options={{ headerShown: false }} />
           <Stack.Screen name="(auth)" options={{ headerShown: false }} />

package-lock.json

@@ -29,6 +29,7 @@
         "expo-haptics": "~55.0.8",
         "expo-image": "^55.0.5",
         "expo-image-picker": "^55.0.10",
+        "expo-intent-launcher": "~55.0.9",
         "expo-linear-gradient": "^55.0.8",
         "expo-media-library": "~55.0.9",
         "expo-notifications": "^55.0.10",
@@ -5747,6 +5748,15 @@
         "expo": "*"
       }
     },
+    "node_modules/expo-intent-launcher": {
+      "version": "55.0.9",
+      "resolved": "https://registry.npmmirror.com/expo-intent-launcher/-/expo-intent-launcher-55.0.9.tgz",
+      "integrity": "sha512-s8k8dF8PfgzN0c+xzNTd9ceHh+/6mt2ncnMuqFaIIry2BeDGITbsgVijHr39eB5vS+KopCcOYYBYr+O1epx4TA==",
+      "license": "MIT",
+      "peerDependencies": {
+        "expo": "*"
+      }
+    },
     "node_modules/expo-json-utils": {
       "version": "55.0.0",
       "resolved": "https://registry.npmmirror.com/expo-json-utils/-/expo-json-utils-55.0.0.tgz",

package.json

@@ -35,6 +35,7 @@
     "expo-haptics": "~55.0.8",
     "expo-image": "^55.0.5",
     "expo-image-picker": "^55.0.10",
+    "expo-intent-launcher": "~55.0.9",
     "expo-linear-gradient": "^55.0.8",
     "expo-media-library": "~55.0.9",
     "expo-notifications": "^55.0.10",

plugins/withMainActivityConfigChange.js

@@ -1,14 +1,10 @@
-import {
+const { withMainActivity } = require('@expo/config-plugins');
-  ConfigPlugin,
-  withMainActivity,
-  AndroidConfig,
-} from '@expo/config-plugins';
 
 /**
  * 在 MainActivity 中添加 onConfigurationChanged 方法
  * 用于监听系统深色模式变化并通知 React Native
  */
-const withMainActivityConfigChange: ConfigPlugin = (config) => {
+const withMainActivityConfigChange = (config) => {
   return withMainActivity(config, async (config) => {
     const { contents } = config.modResults;
 
@@ -74,4 +70,4 @@ import android.content.res.Configuration`;
   });
 };
 
-export default withMainActivityConfigChange;
+module.exports = withMainActivityConfigChange;

src/screens/home/HomeScreen.tsx

@@ -26,7 +26,7 @@ import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { Gesture, GestureDetector } from 'react-native-gesture-handler';
 import { useAppColors, useResolvedColorScheme, spacing, borderRadius, shadows, type AppColors } from '../../theme';
 import { Post } from '../../types';
-import { useUserStore, useHomeTabBarVisibilityStore } from '../../stores';
+import { useUserStore, useHomeTabBarVisibilityStore, useHomeTabPressStore } from '../../stores';
 import { useCurrentUser } from '../../stores/authStore';
 import { channelService, postService } from '../../services';
 import { PostCard, TabBar, SearchBar } from '../../components/business';
@@ -212,9 +212,14 @@ export const HomeScreen: React.FC = () => {
 
   const setBottomTabBarHiddenByScroll = useHomeTabBarVisibilityStore((s) => s.setBottomTabBarHiddenByScroll);
   const bottomTabBarHiddenByScroll = useHomeTabBarVisibilityStore((s) => s.bottomTabBarHiddenByScroll);
+  const homeTabPressCount = useHomeTabPressStore((s) => s.pressCount);
   const homeListScrollYRef = useRef(0);
   const tabBarIdleRestoreTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
 
+  // FlatList 和 ScrollView 的 ref，用于滚动到顶部
+  const flatListRef = useRef<FlatList<Post> | null>(null);
+  const scrollViewRef = useRef<ScrollView | null>(null);
+
   const clearTabBarIdleRestoreTimer = useCallback(() => {
     if (tabBarIdleRestoreTimerRef.current != null) {
       clearTimeout(tabBarIdleRestoreTimerRef.current);
@@ -269,6 +274,19 @@ export const HomeScreen: React.FC = () => {
     }
   }, [showSearch, clearTabBarIdleRestoreTimer, setBottomTabBarHiddenByScroll]);
 
+  // 监听首页 Tab 点击事件，滚动到顶部
+  useEffect(() => {
+    if (homeTabPressCount > 0) {
+      // 滚动 FlatList 到顶部
+      flatListRef.current?.scrollToOffset({ offset: 0, animated: true });
+      // 滚动 ScrollView 到顶部（网格模式）
+      scrollViewRef.current?.scrollTo({ y: 0, animated: true });
+      // 重置底部 Tab 栏状态
+      setBottomTabBarHiddenByScroll(false);
+      homeListScrollYRef.current = 0;
+    }
+  }, [homeTabPressCount, setBottomTabBarHiddenByScroll]);
+
   /** 横向胶囊条滚动位置：切换频道刷新列表时不重置 */
   const capsuleHScrollRef = useRef<ScrollView | null>(null);
   const capsuleScrollXRef = useRef(0);
@@ -819,6 +837,7 @@ export const HomeScreen: React.FC = () => {
       // 移动端使用瀑布流布局（2列）
       return (
         <ScrollView
+          ref={scrollViewRef}
           style={styles.waterfallScroll}
           contentContainerStyle={[
             styles.waterfallContainer,
@@ -899,6 +918,7 @@ export const HomeScreen: React.FC = () => {
     // 移动端和宽屏都使用单列 FlatList，宽屏下居中显示
     return (
       <FlatList
+        ref={flatListRef}
         data={displayPosts}
         renderItem={renderPostList}
         keyExtractor={keyExtractor}

src/screens/message/components/ChatScreen/MessageBubble.tsx

@@ -404,7 +404,7 @@ export const MessageBubble: React.FC<MessageBubbleProps> = ({
             >
               <Avatar
                 source={senderInfo.avatar}
-                size={36}
+                size={40}
                 name={senderInfo.nickname}
               />
             </TouchableOpacity>
@@ -418,7 +418,7 @@ export const MessageBubble: React.FC<MessageBubbleProps> = ({
             >
               <Avatar
                 source={otherUser?.avatar || null}
-                size={36}
+                size={40}
                 name={otherUser?.nickname || ''}
               />
             </TouchableOpacity>
@@ -452,7 +452,7 @@ export const MessageBubble: React.FC<MessageBubbleProps> = ({
             <View style={styles.avatarWrapper}>
               <Avatar
                 source={currentUser?.avatar || null}
-                size={36}
+                size={40}
                 name={currentUser?.nickname || ''}
               />
             </View>

src/screens/message/components/ChatScreen/SegmentRenderer.tsx

@@ -847,41 +847,36 @@ function createSegmentStyles(colors: AppColors) {
     marginTop: 2,
   },
 
-  // 文本 - Telegram风格：统一深色字体
+  // 文本 - 柔和风格：深灰色文字 + 正常字重
   textContent: {
-    fontSize: 16,
+    fontSize: 17.5,
-    lineHeight: 23,
+    lineHeight: 25,
-    letterSpacing: 0.2,
+    letterSpacing: 0.1,
     fontWeight: '400',
   },
   textMe: {
-    color: colors.chat.textPrimary,
+    color: '#2A2A2A',
   },
   textOther: {
-    color: colors.chat.textPrimary,
+    color: '#2A2A2A',
   },
 
-  // @提及 - Telegram风格：蓝色高亮
+  // @提及 - 微信/QQ 风格：更精致的高亮
   atText: {
     fontSize: 16,
-    lineHeight: 23,
+    lineHeight: 22,
-    fontWeight: '600',
+    fontWeight: '500',
-    paddingHorizontal: 2,
   },
   atTextMe: {
-    color: '#4A88C7',
+    color: '#1A5F9E',  // 深蓝色，在绿色背景上更清晰
-    backgroundColor: 'rgba(74, 136, 199, 0.12)',
-    borderRadius: 4,
   },
   atTextOther: {
     color: colors.chat.link,
-    backgroundColor: 'rgba(74, 136, 199, 0.12)',
-    borderRadius: 4,
   },
   atHighlight: {
-    backgroundColor: 'rgba(74, 136, 199, 0.2)',
+    backgroundColor: 'rgba(74, 136, 199, 0.15)',
     borderRadius: 4,
-    paddingHorizontal: 4,
+    paddingHorizontal: 3,
   },
 
   // 图片 - QQ风格：保持原始宽高比

src/screens/message/components/ChatScreen/styles.ts

@@ -201,7 +201,7 @@ export function createChatScreenStyles(colors: AppColors) {
     alignItems: 'flex-start',
   },
   
-  // 头像
+  // 头像 - 更大一点
   avatarWrapper: {
     marginHorizontal: 2,
     shadowColor: colors.chat.shadow,
@@ -226,43 +226,43 @@ export function createChatScreenStyles(colors: AppColors) {
     alignItems: 'flex-start',
   },
   senderName: {
-    fontSize: 13,
+    fontSize: 14,
-    color: colors.chat.link,
+    color: '#555555', // 柔和的深灰色
     marginBottom: 4,
     marginLeft: 4,
     fontWeight: '600',
   },
   
-  // 消息气泡 - 外层极轻阴影（纯文字气泡更接近扁平 IM）
+  // 消息气泡 - 微信风格：更小的圆角 + 更紧凑的内边距
   messageBubbleOuter: {
-    borderRadius: 16,
+    borderRadius: 12,
-    minWidth: 60,
+    minWidth: 44,
     shadowColor: colors.chat.shadow,
-    shadowOffset: { width: 0, height: 0.5 },
+    shadowOffset: { width: 0, height: 1 },
-    shadowOpacity: 0.04,
+    shadowOpacity: 0.06,
-    shadowRadius: 1,
+    shadowRadius: 2,
     elevation: 1,
   },
   myBubbleOuter: {
-    borderBottomRightRadius: 4,
+    borderBottomRightRadius: 4,  // 微信的小尾巴更尖
   },
   theirBubbleOuter: {
     borderTopLeftRadius: 4,
   },
-  // 内层：背景 + 裁剪，防止回复条/@ 高亮在圆角外露出颜色
+  // 内层：更紧凑的微信风格内边距
   messageBubbleInner: {
-    borderRadius: 16,
+    borderRadius: 12,
     overflow: 'hidden',
-    paddingHorizontal: spacing.md,
+    paddingHorizontal: 10,  // 微信：更窄的左右边距
-    paddingVertical: spacing.sm + 4,
+    paddingVertical: 7,     // 微信：更紧的上下边距
-    minWidth: 60,
+    minWidth: 44,
   },
   myBubbleInner: {
-    backgroundColor: colors.chat.replyTint,
+    backgroundColor: colors.chat.bubbleOutgoing,
     borderBottomRightRadius: 4,
   },
   theirBubbleInner: {
-    backgroundColor: colors.chat.card,
+    backgroundColor: colors.chat.bubbleIncoming,
     borderTopLeftRadius: 4,
   },
   recalledBubble: {
@@ -272,17 +272,17 @@ export function createChatScreenStyles(colors: AppColors) {
     borderStyle: 'dashed',
   },
   myBubbleText: {
-    color: colors.chat.textPrimary, // 主文案
+    color: '#2A2A2A',
-    fontSize: 16,
+    fontSize: 18,     // 更大字体
-    lineHeight: 23,
+    lineHeight: 25,   // 相应调大行高
-    letterSpacing: 0.2,
+    letterSpacing: 0.1,
     fontWeight: '400',
   },
   theirBubbleText: {
-    color: colors.chat.textPrimary, // 主文案
+    color: '#2A2A2A',
-    fontSize: 16,
+    fontSize: 18,
-    lineHeight: 23,
+    lineHeight: 25,
-    letterSpacing: 0.2,
+    letterSpacing: 0.1,
     fontWeight: '400',
   },
   // 选中状态
@@ -312,21 +312,21 @@ export function createChatScreenStyles(colors: AppColors) {
     fontStyle: 'italic',
   },
   
-  // 图片消息 - QQ风格：更大的图片，更明显的圆角
+  // 图片消息 - QQ/微信风格：更大的圆角，更柔和的阴影
   imageBubble: {
     borderRadius: 18,
     overflow: 'hidden',
     shadowColor: colors.chat.shadow,
     shadowOffset: { width: 0, height: 3 },
-    shadowOpacity: 0.15,
+    shadowOpacity: 0.12,
     shadowRadius: 6,
-    elevation: 5,
+    elevation: 4,
   },
   myImageBubble: {
-    borderBottomRightRadius: 6, // 右下角尖，箭头在右下
+    borderBottomRightRadius: 8,
   },
   theirImageBubble: {
-    borderTopLeftRadius: 6, // 左上角尖，箭头在左上
+    borderTopLeftRadius: 8,
   },
   messageImage: {
     width: 220,

src/services/apkUpdateService.ts

@@ -0,0 +1,277 @@
+/**
+ * APK 更新检查服务
+ * 用于检查最新版本并提示用户下载更新
+ */
+
+import { Platform, Linking, Alert } from 'react-native';
+import Constants from 'expo-constants';
+import * as FileSystem from 'expo-file-system/legacy';
+import * as IntentLauncher from 'expo-intent-launcher';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import { showConfirm } from './dialogService';
+
+// 更新服务器地址
+const UPDATES_SERVER_URL = Constants.expoConfig?.extra?.updatesUrl
+  ? Constants.expoConfig.extra.updatesUrl.replace('/api/manifest', '')
+  : 'https://updates.littlelan.cn';
+
+// 检查间隔（毫秒）：24小时
+const CHECK_INTERVAL = 24 * 60 * 60 * 1000;
+
+// 最后检查时间存储键
+const LAST_CHECK_KEY = 'apk_update_last_check';
+
+// APK 版本信息
+export interface APKVersionInfo {
+  runtimeVersion: string;
+  versionName: string;
+  size: number;
+  downloadUrl: string;
+  createdAt: string;
+}
+
+// 版本比较结果
+export interface VersionCheckResult {
+  hasUpdate: boolean;
+  currentVersion: string;
+  latestVersion: string;
+  downloadUrl: string;
+  size: number;
+}
+
+/**
+ * 比较版本号
+ * 返回: 1 表示 v1 > v2, -1 表示 v1 < v2, 0 表示相等
+ */
+function compareVersions(v1: string, v2: string): number {
+  const parts1 = v1.split('.').map(Number);
+  const parts2 = v2.split('.').map(Number);
+  
+  for (let i = 0; i < Math.max(parts1.length, parts2.length); i++) {
+    const p1 = parts1[i] || 0;
+    const p2 = parts2[i] || 0;
+    if (p1 > p2) return 1;
+    if (p1 < p2) return -1;
+  }
+  return 0;
+}
+
+/**
+ * 获取最新 APK 版本信息
+ */
+async function fetchLatestAPKVersion(): Promise<APKVersionInfo | null> {
+  try {
+    const response = await fetch(`${UPDATES_SERVER_URL}/api/apk/latest`, {
+      method: 'GET',
+      headers: {
+        'Accept': 'application/json',
+      },
+    });
+
+    if (!response.ok) {
+      console.warn('Failed to fetch latest APK version:', response.status);
+      return null;
+    }
+
+    const data: APKVersionInfo = await response.json();
+    return data;
+  } catch (error) {
+    console.error('Error fetching latest APK version:', error);
+    return null;
+  }
+}
+
+/**
+ * 获取当前应用版本
+ */
+function getCurrentVersion(): string {
+  return Constants.expoConfig?.version || '1.0.0';
+}
+
+/**
+ * 格式化文件大小
+ */
+function formatFileSize(bytes: number): string {
+  if (bytes < 1024) return `${bytes} B`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
+  if (bytes < 1024 * 1024 * 1024) return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
+  return `${(bytes / (1024 * 1024 * 1024)).toFixed(1)} GB`;
+}
+
+/**
+ * 检查是否应该执行检查（避免频繁检查）
+ */
+async function shouldCheck(): Promise<boolean> {
+  try {
+    const lastCheck = await AsyncStorage.getItem(LAST_CHECK_KEY);
+    if (!lastCheck) return true;
+    
+    const lastCheckTime = parseInt(lastCheck, 10);
+    return Date.now() - lastCheckTime > CHECK_INTERVAL;
+  } catch {
+    return true;
+  }
+}
+
+/**
+ * 记录检查时间
+ */
+async function recordCheckTime(): Promise<void> {
+  try {
+    await AsyncStorage.setItem(LAST_CHECK_KEY, Date.now().toString());
+  } catch (error) {
+    console.error('Failed to record check time:', error);
+  }
+}
+
+/**
+ * 下载并安装 APK
+ */
+async function downloadAndInstallAPK(downloadUrl: string, version: string): Promise<void> {
+  if (Platform.OS !== 'android') {
+    Alert.alert('提示', '此功能仅支持 Android 设备');
+    return;
+  }
+
+  try {
+    const downloadPath = `${FileSystem.documentDirectory}carrot-bbs-${version}.apk`;
+    
+    // 显示下载进度
+    showConfirm({
+      title: '正在下载',
+      message: `正在下载新版本 ${version}，请稍候...`,
+      confirmText: '后台下载',
+      cancelText: '取消',
+      onConfirm: () => {
+        // 用户选择后台下载，继续
+      },
+      onCancel: () => {
+        // 用户取消
+      },
+    });
+
+    // 下载 APK
+    const downloadResult = await FileSystem.downloadAsync(downloadUrl, downloadPath);
+    
+    if (!downloadResult.uri) {
+      Alert.alert('下载失败', '无法下载安装包，请稍后重试');
+      return;
+    }
+
+    // 安装 APK
+    await installAPK(downloadResult.uri);
+  } catch (error) {
+    console.error('Download/Install error:', error);
+    Alert.alert('更新失败', '下载或安装过程中出错，请稍后重试');
+  }
+}
+
+/**
+ * 安装 APK
+ */
+async function installAPK(apkUri: string): Promise<void> {
+  try {
+    // 获取文件的 content URI
+    const contentUri = await FileSystem.getContentUriAsync(apkUri);
+    
+    // 使用 Intent 安装 APK
+    await IntentLauncher.startActivityAsync('android.intent.action.INSTALL_PACKAGE', {
+      data: contentUri,
+      flags: 1, // FLAG_GRANT_READ_URI_PERMISSION
+    });
+  } catch (error) {
+    console.error('Install APK error:', error);
+    // 尝试使用浏览器下载
+    const webUrl = apkUri.replace('file://', '');
+    Linking.openURL(webUrl);
+  }
+}
+
+/**
+ * 显示更新提示对话框
+ */
+function showUpdateDialog(result: VersionCheckResult): void {
+  const sizeText = formatFileSize(result.size);
+  
+  showConfirm({
+    title: '发现新版本',
+    message: `当前版本: ${result.currentVersion}\n最新版本: ${result.latestVersion}\n安装包大小: ${sizeText}\n\n是否立即下载更新？`,
+    confirmText: '立即更新',
+    cancelText: '稍后提醒',
+    onConfirm: () => {
+      downloadAndInstallAPK(result.downloadUrl, result.latestVersion);
+    },
+  });
+}
+
+/**
+ * 检查 APK 更新（主入口）
+ * @param force 是否强制检查（忽略时间间隔）
+ */
+export async function checkForAPKUpdate(force: boolean = false): Promise<VersionCheckResult | null> {
+  // 仅在 Android 平台检查
+  if (Platform.OS !== 'android') {
+    return null;
+  }
+
+  // 检查是否应该执行检查
+  if (!force) {
+    const should = await shouldCheck();
+    if (!should) {
+      console.log('APK update check skipped (too frequent)');
+      return null;
+    }
+  }
+
+  // 记录检查时间
+  await recordCheckTime();
+
+  // 获取最新版本信息
+  const latestAPK = await fetchLatestAPKVersion();
+  if (!latestAPK) {
+    console.log('No APK version info available');
+    return null;
+  }
+
+  const currentVersion = getCurrentVersion();
+  const latestVersion = latestAPK.versionName || latestAPK.runtimeVersion;
+
+  // 比较版本
+  const comparison = compareVersions(currentVersion, latestVersion);
+  
+  const result: VersionCheckResult = {
+    hasUpdate: comparison < 0,
+    currentVersion,
+    latestVersion,
+    downloadUrl: latestAPK.downloadUrl,
+    size: latestAPK.size,
+  };
+
+  // 如果有更新，显示对话框
+  if (result.hasUpdate) {
+    showUpdateDialog(result);
+  }
+
+  return result;
+}
+
+/**
+ * 手动检查更新（用户主动触发）
+ */
+export async function manualCheckForUpdate(): Promise<void> {
+  const result = await checkForAPKUpdate(true);
+  
+  if (!result) {
+    Alert.alert('检查失败', '无法获取版本信息，请检查网络连接');
+    return;
+  }
+  
+  if (!result.hasUpdate) {
+    Alert.alert('已是最新', `当前版本 ${result.currentVersion} 已是最新版本`);
+  }
+}
+
+export const apkUpdateService = {
+  checkForAPKUpdate,
+  manualCheckForUpdate,
+};

src/services/index.ts

@@ -110,3 +110,7 @@ export {
 // 统一提示/弹窗服务
 export { showPrompt } from './promptService';
 export { showConfirm } from './dialogService';
+
+// APK 更新检查服务
+export { apkUpdateService, checkForAPKUpdate, manualCheckForUpdate } from './apkUpdateService';
+export type { APKVersionInfo, VersionCheckResult } from './apkUpdateService';

src/stores/homeTabPressStore.ts

@@ -0,0 +1,13 @@
+import { create } from 'zustand';
+
+interface HomeTabPressState {
+  /** 用于触发首页回到顶部的事件计数器 */
+  pressCount: number;
+  /** 触发首页 Tab 点击事件 */
+  triggerPress: () => void;
+}
+
+export const useHomeTabPressStore = create<HomeTabPressState>((set) => ({
+  pressCount: 0,
+  triggerPress: () => set((state) => ({ pressCount: state.pressCount + 1 })),
+}));

src/stores/index.ts

@@ -44,6 +44,9 @@ export { userManager } from './userManager';
 export {
   useHomeTabBarVisibilityStore,
 } from './homeTabBarVisibilityStore';
+export {
+  useHomeTabPressStore,
+} from './homeTabPressStore';
 export {
   useAppColors,
   useThemePreference,

src/theme/palettes.ts

@@ -76,8 +76,8 @@ export const lightColors = {
     link: '#4A88C7',
     success: '#34C759',
     danger: '#FF3B30',
-    bubbleOutgoing: '#E8E8E8',
+    bubbleOutgoing: '#7CB9FF',  // 柔和的淡蓝色
-    bubbleIncoming: '#FFFFFF',
+    bubbleIncoming: '#FFFFFF',  // 对方发的消息 - 纯白
     replyTint: '#DFF2FF',
     replyTintActive: '#CFEAFF',
     replyBorder: '#7FB6E6',