feat(Notification): implement notification preferences management and enhance notification handling

- Introduced a new service for managing notification preferences, including push notifications, sound, and vibration settings.
- Updated the notification handling logic to respect user preferences, ensuring notifications are displayed according to user settings.
- Refactored the App and various screens to integrate the new notification preferences, improving user experience and consistency.
- Enhanced the HomeScreen and NotificationSettingsScreen to load and update notification settings seamlessly.
- Implemented a mechanism to hide the bottom tab bar based on scroll events, improving navigation usability.

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

@@ -1,11 +1,12 @@
+import { useMemo } from 'react';
 import { Platform, useWindowDimensions } from 'react-native';
-import { Tabs } from 'expo-router';
+import { Tabs, usePathname } from 'expo-router';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
 
 import { colors, shadows } from '../../../src/theme';
 import { BREAKPOINTS } from '../../../src/hooks/useResponsive';
-import { useTotalUnreadCount } from '../../../src/stores';
+import { useHomeTabBarVisibilityStore, useTotalUnreadCount } from '../../../src/stores';
 
 const TAB_BAR_HEIGHT = 56;
 const TAB_BAR_FLOATING_MARGIN = 12;
@@ -14,31 +15,50 @@ const TAB_BAR_MARGIN = 20;
 export default function TabsLayout() {
   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]);
+
   return (
     <Tabs
       screenOptions={{
         headerShown: false,
         tabBarActiveTintColor: colors.primary.main,
         tabBarInactiveTintColor: colors.text.secondary,
-        tabBarStyle: hideTabBar
-          ? { display: 'none', height: 0, overflow: 'hidden' }
-          : {
-              position: 'absolute',
-              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,
-            },
+        tabBarStyle,
         tabBarItemStyle: {
           borderRadius: 16,
           marginHorizontal: 2,
@@ -62,13 +82,12 @@ export default function TabsLayout() {
         }}
       />
       <Tabs.Screen
-        name="messages"
+        name="apps"
         options={{
-          title: '消息',
-          tabBarBadge: unreadCount > 0 ? (unreadCount > 99 ? 99 : unreadCount) : undefined,
+          title: '应用',
           tabBarIcon: ({ color, focused }) => (
             <MaterialCommunityIcons
-              name={focused ? 'message-text' : 'message-text-outline'}
+              name={focused ? 'view-grid' : 'view-grid-outline'}
               size={focused ? 24 : 22}
               color={color}
             />
@@ -76,12 +95,13 @@ export default function TabsLayout() {
         }}
       />
       <Tabs.Screen
-        name="apps"
+        name="messages"
         options={{
-          title: '应用',
+          title: '消息',
+          tabBarBadge: unreadCount > 0 ? (unreadCount > 99 ? 99 : unreadCount) : undefined,
           tabBarIcon: ({ color, focused }) => (
             <MaterialCommunityIcons
-              name={focused ? 'view-grid' : 'view-grid-outline'}
+              name={focused ? 'message-text' : 'message-text-outline'}
               size={focused ? 24 : 22}
               color={color}
             />

app/_layout.tsx

@@ -8,6 +8,7 @@ import { PaperProvider } from 'react-native-paper';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import * as Notifications from 'expo-notifications';
 
+import { registerNotificationPresentationHandler } from '../src/services/notificationPreferences';
 import { paperTheme } from '../src/theme';
 import { AppBackButton } from '../src/components/common';
 import AppPromptBar from '../src/components/common/AppPromptBar';
@@ -16,15 +17,7 @@ import { installAlertOverride } from '../src/services/alertOverride';
 import { useAuthStore } from '../src/stores';
 import { colors } from '../src/theme';
 
-Notifications.setNotificationHandler({
-  handleNotification: async () => ({
-    shouldShowAlert: true,
-    shouldPlaySound: true,
-    shouldSetBadge: true,
-    shouldShowBanner: true,
-    shouldShowList: true,
-  }),
-});
+registerNotificationPresentationHandler();
 
 const queryClient = new QueryClient({
   defaultOptions: {
@@ -78,6 +71,8 @@ function NotificationBootstrap() {
 
   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');

src/app-navigation/AppDesktopShell.tsx

@@ -23,8 +23,8 @@ 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: 'MessageTab', label: '消息', href: '/messages', icon: 'message-text', iconOutline: 'message-text-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' },
 ];
 

src/components/business/PostCard/PostCard.tsx

@@ -346,14 +346,6 @@ const PostCardInner: React.FC<PostCardProps> = (normalizedProps) => {
             {!showGrid && (
               <View style={styles.metaRow}>
                 <PostCardRelativeTime createdAt={post.created_at} style={styles.timeText} />
-                {!!post.channel?.name && (
-                  <View style={styles.channelTag}>
-                    <MaterialCommunityIcons name="tag-outline" size={11} color={colors.primary.main} />
-                    <Text style={styles.channelTagText} numberOfLines={1}>
-                      {post.channel.name}
-                    </Text>
-                  </View>
-                )}
                 {post.is_pinned && (
                   <View style={styles.pinnedTag}>
                     <MaterialCommunityIcons name="pin" size={10} color={colors.warning.main} />
@@ -402,9 +394,19 @@ const PostCardInner: React.FC<PostCardProps> = (normalizedProps) => {
       {renderTopComment()}
 
       <View style={styles.actions}>
-        <View style={styles.viewsWrap}>
-          <MaterialCommunityIcons name="eye-outline" size={16} color={colors.text.hint} />
-          <Text style={styles.viewsText}>{post.views_count || 0}</Text>
+        <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}>
@@ -571,9 +573,22 @@ const styles = StyleSheet.create({
     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,

src/components/business/TabBar.tsx

@@ -5,7 +5,7 @@
  */
 
 import React, { ReactNode } from 'react';
-import { View, TouchableOpacity, StyleSheet, ScrollView, Animated } from 'react-native';
+import { View, TouchableOpacity, StyleSheet, ScrollView, Animated, ViewStyle, StyleProp } from 'react-native';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { colors, spacing, fontSizes, borderRadius } from '../../theme';
 import Text from '../common/Text';
@@ -20,6 +20,8 @@ interface TabBarProps {
   rightContent?: ReactNode;
   variant?: TabBarVariant;
   icons?: string[];
+  /** 合并到最外层容器，用于按页面微调外边距等 */
+  style?: StyleProp<ViewStyle>;
 }
 
 const TabBar: React.FC<TabBarProps> = ({
@@ -30,6 +32,7 @@ const TabBar: React.FC<TabBarProps> = ({
   rightContent,
   variant = 'default',
   icons,
+  style,
 }) => {
   const renderTabs = () => {
     return tabs.map((tab, index) => {
@@ -157,7 +160,7 @@ const TabBar: React.FC<TabBarProps> = ({
 
   if (scrollable) {
     return (
-      <View style={getContainerStyle()}>
+      <View style={[getContainerStyle(), style]}>
         <ScrollView
           horizontal
           showsHorizontalScrollIndicator={false}
@@ -171,7 +174,7 @@ const TabBar: React.FC<TabBarProps> = ({
   }
 
   return (
-    <View style={getContainerStyle()}>
+    <View style={[getContainerStyle(), style]}>
       {renderTabs()}
       {rightContent && <View style={styles.rightContent}>{rightContent}</View>}
     </View>

src/core/entities/Post.ts

@@ -77,6 +77,8 @@ export interface Post {
   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 */

src/data/mappers/PostMapper.ts

@@ -25,6 +25,10 @@ export class PostMapper {
       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()),
       // 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」

src/data/models/index.ts

@@ -86,6 +86,8 @@ export interface PostModel {
   isTop: boolean;
   status: 'published' | 'draft' | 'deleted';
   channelId?: string;
+  /** 频道展示用（与 PostDTO.channel 一致） */
+  channel?: { id: string; name: string } | null;
   tags?: string[];
   createdAt: Date;
   updatedAt: Date;

src/data/repositories/PostRepository.ts

@@ -42,6 +42,7 @@ interface PostApiResponse {
   created_at: string;
   updated_at: string;
   content_edited_at?: string;
+  channel?: { id: string; name: string } | null;
   author?: {
     id: number;
     username: string;
@@ -125,6 +126,7 @@ export class PostRepository implements IPostRepository {
       isPinned: model.isTop,
       status: model.status,
       channelId: model.channelId,
+      channel: model.channel,
       tags: model.tags || [],
       createdAt: model.createdAt.toISOString(),
       updatedAt: model.updatedAt.toISOString(),

src/screens/apps/AppsScreen.tsx

@@ -1,25 +1,23 @@
 /**
- * 应用中心：聚合站内轻应用入口
+ * 应用中心：与首页顶栏、个人主页帖子卡片同一套圆角 / 阴影 / 主色体系
  */
 
-import React, { useCallback, useMemo, useState } from 'react';
-import { View, StyleSheet, ScrollView, TouchableOpacity } from 'react-native';
+import React, { useCallback } from 'react';
+import { View, StyleSheet, ScrollView, TouchableOpacity, StatusBar } from 'react-native';
 import { SafeAreaView, useSafeAreaInsets } from 'react-native-safe-area-context';
-import { StatusBar } from 'expo-status-bar';
 import { useRouter } from 'expo-router';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import { LinearGradient } from 'expo-linear-gradient';
 
 import { colors, spacing, fontSizes, borderRadius, shadows } from '../../theme';
 import * as hrefs from '../../navigation/hrefs';
 import { Text, ResponsiveContainer } from '../../components/common';
-import { useResponsive } from '../../hooks/useResponsive';
+import { useResponsive, useResponsiveSpacing, useBreakpointGTE } from '../../hooks/useResponsive';
+
 type AppItem = {
   id: string;
   title: string;
   subtitle: string;
   icon: React.ComponentProps<typeof MaterialCommunityIcons>['name'];
-  gradient: readonly [string, string, ...string[]];
   href: string;
 };
 
@@ -27,28 +25,32 @@ const APP_ENTRIES: AppItem[] = [
   {
     id: 'schedule',
     title: '课表',
-    subtitle: '周视图 · 教务同步',
+    subtitle: '周课表、教务同步与课程管理',
     icon: 'calendar-week',
-    gradient: [colors.primary.main, colors.primary.light],
     href: hrefs.hrefSchedule(),
   },
 ];
 
+/** 与个人主页 PostCard 外层 `postWrapper` 一致 */
+const postCardShell = {
+  marginBottom: spacing.md,
+  backgroundColor: colors.background.paper,
+  borderRadius: 16,
+  overflow: 'hidden' as const,
+  shadowColor: '#000',
+  shadowOffset: { width: 0, height: 2 },
+  shadowOpacity: 0.06,
+  shadowRadius: 8,
+  elevation: 2,
+};
+
 export const AppsScreen: React.FC = () => {
   const router = useRouter();
   const insets = useSafeAreaInsets();
-  const { isMobile, isTablet, width } = useResponsive();
-
-  const columns = useMemo(() => {
-    if (width >= 900) return 4;
-    if (isTablet || width >= 600) return 3;
-    return 2;
-  }, [isTablet, width]);
-
-  const gap = spacing.md;
-  const [gridWidth, setGridWidth] = useState(0);
-  const cardWidth =
-    gridWidth > 0 ? (gridWidth - gap * (columns - 1)) / columns : undefined;
+  const { isMobile } = useResponsive();
+  /** 与 MessageListScreen 顶栏宽屏 padding 一致 */
+  const isWideScreen = useBreakpointGTE('lg');
+  const responsivePadding = useResponsiveSpacing({ xs: 8, sm: 12, md: 16, lg: 24, xl: 32 });
 
   const scrollBottomInset = isMobile ? 88 + insets.bottom + spacing.md : spacing['3xl'];
 
@@ -59,74 +61,82 @@ export const AppsScreen: React.FC = () => {
     [router]
   );
 
-  return (
-    <SafeAreaView style={styles.safe} edges={['top']}>
-      <StatusBar style="dark" />
-      <ScrollView
-        style={styles.scroll}
-        contentContainerStyle={[styles.scrollContent, { paddingBottom: scrollBottomInset }]}
-        showsVerticalScrollIndicator={false}
-      >
-        <ResponsiveContainer maxWidth={960}>
-          <LinearGradient
-            colors={[`${colors.primary.main}18`, `${colors.primary.light}10`, 'transparent']}
-            start={{ x: 0, y: 0 }}
-            end={{ x: 1, y: 1 }}
-            style={styles.hero}
-          >
-            <View style={styles.heroIconWrap}>
-              <LinearGradient
-                colors={[colors.primary.main, colors.primary.light]}
-                style={styles.heroIconGradient}
-                start={{ x: 0, y: 0 }}
-                end={{ x: 1, y: 1 }}
-              >
-                <MaterialCommunityIcons name="apps" size={28} color={colors.primary.contrast} />
-              </LinearGradient>
+  const renderTiles = () => (
+    <>
+      <Text variant="caption" color={colors.text.secondary} style={styles.pageSubtitle}>
+        与社区账号打通的轻应用入口
+      </Text>
+      {APP_ENTRIES.map(item => (
+        <TouchableOpacity
+          key={item.id}
+          style={postCardShell}
+          onPress={() => onOpenApp(item.href)}
+          activeOpacity={0.88}
+        >
+          <View style={styles.appCardInner}>
+            <View style={styles.appIconCircle}>
+              <MaterialCommunityIcons name={item.icon} size={26} color={colors.primary.contrast} />
             </View>
-            <Text style={styles.heroTitle}>应用</Text>
-            <Text style={styles.heroSubtitle}>学习与生活常用工具，持续扩充中</Text>
-          </LinearGradient>
-
-          <Text style={styles.sectionLabel}>全部应用</Text>
-          <View
-            style={[styles.grid, { gap }]}
-            onLayout={e => setGridWidth(e.nativeEvent.layout.width)}
-          >
-            {APP_ENTRIES.map(item => (
-              <TouchableOpacity
-                key={item.id}
-                style={[styles.card, cardWidth != null ? { width: cardWidth } : styles.cardFlex, shadows.md]}
-                onPress={() => onOpenApp(item.href)}
-                activeOpacity={0.88}
-              >
-                <LinearGradient
-                  colors={item.gradient}
-                  start={{ x: 0, y: 0 }}
-                  end={{ x: 1, y: 1 }}
-                  style={styles.cardIconRing}
-                >
-                  <View style={styles.cardIconInner}>
-                    <MaterialCommunityIcons name={item.icon} size={26} color={colors.primary.main} />
-                  </View>
-                </LinearGradient>
-                <Text style={styles.cardTitle} numberOfLines={1}>
-                  {item.title}
-                </Text>
-                <Text style={styles.cardSubtitle} numberOfLines={2}>
-                  {item.subtitle}
-                </Text>
-                <View style={styles.cardFooter}>
-                  <Text style={styles.cardAction}>打开</Text>
-                  <MaterialCommunityIcons name="chevron-right" size={18} color={colors.primary.main} />
-                </View>
-              </TouchableOpacity>
-            ))}
+            <View style={styles.appCardText}>
+              <Text variant="body" color={colors.text.primary} style={styles.appTitle}>
+                {item.title}
+              </Text>
+              <Text variant="caption" color={colors.text.secondary} style={styles.appSubtitle}>
+                {item.subtitle}
+              </Text>
+            </View>
+            <MaterialCommunityIcons name="chevron-right" size={22} color={colors.primary.main} />
           </View>
+        </TouchableOpacity>
+      ))}
 
-          <Text style={styles.hint}>更多应用敬请期待</Text>
+      <View style={styles.footer}>
+        <Text variant="caption" color={colors.text.hint}>
+          更多应用陆续上线
+        </Text>
+      </View>
+    </>
+  );
+
+  return (
+    <SafeAreaView style={styles.container} edges={['top', 'bottom']}>
+      <StatusBar barStyle="dark-content" backgroundColor="#FAFAFA" />
+
+      {/* 与 MessageListScreen 顶栏同一结构 / 样式 */}
+      <View style={[styles.msgHeader, isWideScreen && styles.msgHeaderWide]}>
+        <View style={styles.msgHeaderLeft} />
+        <View style={styles.msgHeaderCenter}>
+          <Text style={[styles.msgHeaderTitle, ...(isWideScreen ? [styles.msgHeaderTitleWide] : [])]}>
+            应用
+          </Text>
+        </View>
+        <View style={styles.msgHeaderRight}>
+          <View style={styles.msgHeaderRightSpacer} />
+        </View>
+      </View>
+
+      {isWideScreen ? (
+        <ResponsiveContainer maxWidth={720}>
+          <ScrollView
+            style={styles.scroll}
+            contentContainerStyle={[styles.scrollContent, { paddingBottom: scrollBottomInset }]}
+            showsVerticalScrollIndicator={false}
+          >
+            {renderTiles()}
+          </ScrollView>
         </ResponsiveContainer>
-      </ScrollView>
+      ) : (
+        <ScrollView
+          style={styles.scroll}
+          contentContainerStyle={[
+            styles.scrollContent,
+            { paddingBottom: scrollBottomInset, paddingHorizontal: responsivePadding },
+          ]}
+          showsVerticalScrollIndicator={false}
+        >
+          {renderTiles()}
+        </ScrollView>
+      )}
     </SafeAreaView>
   );
 };
@@ -134,115 +144,92 @@ export const AppsScreen: React.FC = () => {
 export default AppsScreen;
 
 const styles = StyleSheet.create({
-  safe: {
+  container: {
     flex: 1,
     backgroundColor: colors.background.default,
   },
+  msgHeader: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    paddingHorizontal: spacing.md,
+    paddingVertical: spacing.md,
+    backgroundColor: '#FAFAFA',
+    ...shadows.sm,
+  },
+  msgHeaderWide: {
+    paddingHorizontal: spacing.lg,
+    paddingVertical: spacing.lg,
+  },
+  msgHeaderLeft: {
+    width: 44,
+  },
+  msgHeaderCenter: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: spacing.xs,
+  },
+  msgHeaderTitle: {
+    fontSize: 19,
+    fontWeight: '700',
+    color: '#333',
+  },
+  msgHeaderTitleWide: {
+    fontSize: 22,
+  },
+  msgHeaderRight: {
+    flexDirection: 'row',
+    alignItems: 'center',
+  },
+  /** 与消息页「+」按钮同占位宽度，标题视觉居中 */
+  msgHeaderRightSpacer: {
+    width: 36,
+    height: 44,
+  },
+  pageSubtitle: {
+    marginBottom: spacing.md,
+    lineHeight: fontSizes.sm * 1.45,
+  },
+  /** 与消息列表区同色，避免顶栏阴影落在灰底上像一条线 */
   scroll: {
     flex: 1,
+    backgroundColor: '#FAFAFA',
   },
   scrollContent: {
     paddingTop: spacing.md,
+    flexGrow: 1,
+    backgroundColor: '#FAFAFA',
+  },
+  appCardInner: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    paddingVertical: spacing.lg,
     paddingHorizontal: spacing.lg,
   },
-  hero: {
-    borderRadius: borderRadius['2xl'],
-    paddingVertical: spacing['2xl'],
-    paddingHorizontal: spacing.xl,
-    marginBottom: spacing['2xl'],
-    overflow: 'hidden',
-  },
-  heroIconWrap: {
-    marginBottom: spacing.md,
-  },
-  heroIconGradient: {
+  /** 与首页发帖 FAB 同主色实心圆 */
+  appIconCircle: {
     width: 52,
     height: 52,
-    borderRadius: borderRadius.xl,
-    alignItems: 'center',
-    justifyContent: 'center',
-    ...shadows.md,
-  },
-  heroTitle: {
-    fontSize: fontSizes['3xl'],
-    fontWeight: '800',
-    color: colors.text.primary,
-    letterSpacing: -0.5,
-  },
-  heroSubtitle: {
-    marginTop: spacing.xs,
-    fontSize: fontSizes.sm,
-    color: colors.text.secondary,
-    lineHeight: 20,
-    maxWidth: 320,
-  },
-  sectionLabel: {
-    fontSize: fontSizes.xs,
-    fontWeight: '700',
-    color: colors.text.secondary,
-    textTransform: 'uppercase',
-    letterSpacing: 1.2,
-    marginBottom: spacing.md,
-    marginLeft: 2,
-  },
-  grid: {
-    flexDirection: 'row',
-    flexWrap: 'wrap',
-    width: '100%',
-  },
-  cardFlex: {
-    flex: 1,
-    minWidth: 140,
-    maxWidth: '100%',
-  },
-  card: {
-    backgroundColor: colors.background.paper,
-    borderRadius: borderRadius.xl,
-    padding: spacing.lg,
-    borderWidth: 1,
-    borderColor: `${colors.divider}99`,
-  },
-  cardIconRing: {
-    width: 52,
-    height: 52,
-    borderRadius: borderRadius.lg,
-    padding: 2,
-    marginBottom: spacing.md,
-    alignSelf: 'flex-start',
-  },
-  cardIconInner: {
-    flex: 1,
-    borderRadius: borderRadius.md,
-    backgroundColor: colors.background.paper,
+    borderRadius: borderRadius.full,
+    backgroundColor: colors.primary.main,
     alignItems: 'center',
     justifyContent: 'center',
   },
-  cardTitle: {
-    fontSize: fontSizes.lg,
+  appCardText: {
+    flex: 1,
+    marginLeft: spacing.md,
+    marginRight: spacing.sm,
+  },
+  appTitle: {
     fontWeight: '700',
-    color: colors.text.primary,
+    fontSize: fontSizes.md + 1,
   },
-  cardSubtitle: {
-    marginTop: spacing.xs,
-    fontSize: fontSizes.sm,
-    color: colors.text.secondary,
-    lineHeight: 18,
-    minHeight: 36,
+  appSubtitle: {
+    marginTop: 4,
   },
-  cardFooter: {
-    flexDirection: 'row',
+  footer: {
     alignItems: 'center',
-    marginTop: spacing.md,
-  },
-  cardAction: {
-    fontSize: fontSizes.sm,
-    fontWeight: '600',
-    color: colors.primary.main,
-  },
-  hint: {
-    marginTop: spacing['3xl'],
-    textAlign: 'center',
-    fontSize: fontSizes.sm,
-    color: colors.text.hint,
+    paddingTop: spacing.xl,
+    paddingBottom: spacing.md,
   },
 });

src/screens/home/HomeScreen.tsx

@@ -21,12 +21,12 @@ import {
   Modal,
 } from 'react-native';
 import { SafeAreaView, useSafeAreaInsets } from 'react-native-safe-area-context';
-import { useRouter } from 'expo-router';
+import { useRouter, useFocusEffect } from 'expo-router';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { Gesture, GestureDetector } from 'react-native-gesture-handler';
 import { colors, spacing, borderRadius, shadows } from '../../theme';
 import { Post } from '../../types';
-import { useUserStore } from '../../stores';
+import { useUserStore, useHomeTabBarVisibilityStore } from '../../stores';
 import { useCurrentUser } from '../../stores/authStore';
 import { channelService, postService } from '../../services';
 import { PostCard, TabBar, SearchBar } from '../../components/business';
@@ -47,6 +47,10 @@ const SWIPE_COOLDOWN_MS = 300;
 const MOBILE_TAB_BAR_HEIGHT = 64;
 const MOBILE_TAB_FLOATING_MARGIN = 12;
 const MOBILE_FAB_GAP = 12;
+/** 首页纵向滑动超过此阈值视为明确向下/向上划，用于隐藏或显示底部 Tab */
+const TAB_BAR_SCROLL_DELTA_Y = 10;
+/** 停止滑动多久后自动恢复底部 Tab */
+const TAB_BAR_IDLE_RESTORE_MS = 2200;
 
 type ViewMode = 'list' | 'grid';
 type PostType = 'follow' | 'hot' | 'latest';
@@ -93,6 +97,65 @@ export const HomeScreen: React.FC = () => {
   
   const isLoadingMoreRef = useRef(false);
 
+  const setBottomTabBarHiddenByScroll = useHomeTabBarVisibilityStore((s) => s.setBottomTabBarHiddenByScroll);
+  const bottomTabBarHiddenByScroll = useHomeTabBarVisibilityStore((s) => s.bottomTabBarHiddenByScroll);
+  const homeListScrollYRef = useRef(0);
+  const tabBarIdleRestoreTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  const clearTabBarIdleRestoreTimer = useCallback(() => {
+    if (tabBarIdleRestoreTimerRef.current != null) {
+      clearTimeout(tabBarIdleRestoreTimerRef.current);
+      tabBarIdleRestoreTimerRef.current = null;
+    }
+  }, []);
+
+  const scheduleTabBarIdleRestore = useCallback(() => {
+    clearTabBarIdleRestoreTimer();
+    tabBarIdleRestoreTimerRef.current = setTimeout(() => {
+      setBottomTabBarHiddenByScroll(false);
+      tabBarIdleRestoreTimerRef.current = null;
+    }, TAB_BAR_IDLE_RESTORE_MS);
+  }, [clearTabBarIdleRestoreTimer, setBottomTabBarHiddenByScroll]);
+
+  const handleHomeVerticalScroll = useCallback(
+    (event: NativeSyntheticEvent<NativeScrollEvent>) => {
+      const y = event.nativeEvent.contentOffset.y;
+      const dy = y - homeListScrollYRef.current;
+      homeListScrollYRef.current = y;
+
+      scheduleTabBarIdleRestore();
+
+      if (y <= 0) {
+        setBottomTabBarHiddenByScroll(false);
+        return;
+      }
+
+      if (dy > TAB_BAR_SCROLL_DELTA_Y) {
+        setBottomTabBarHiddenByScroll(true);
+      } else if (dy < -TAB_BAR_SCROLL_DELTA_Y) {
+        setBottomTabBarHiddenByScroll(false);
+      }
+    },
+    [scheduleTabBarIdleRestore, setBottomTabBarHiddenByScroll]
+  );
+
+  useFocusEffect(
+    useCallback(() => {
+      return () => {
+        clearTabBarIdleRestoreTimer();
+        homeListScrollYRef.current = 0;
+        setBottomTabBarHiddenByScroll(false);
+      };
+    }, [clearTabBarIdleRestoreTimer, setBottomTabBarHiddenByScroll])
+  );
+
+  useEffect(() => {
+    if (showSearch) {
+      clearTabBarIdleRestoreTimer();
+      setBottomTabBarHiddenByScroll(false);
+    }
+  }, [showSearch, clearTabBarIdleRestoreTimer, 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);
@@ -133,6 +196,11 @@ export const HomeScreen: React.FC = () => {
   const isLatestTab = activeIndex === 1;
   const currentChannelId = isLatestTab && activeCapsuleId ? activeCapsuleId : undefined;
 
+  useEffect(() => {
+    homeListScrollYRef.current = 0;
+    setBottomTabBarHiddenByScroll(false);
+  }, [activeIndex, currentChannelId, viewMode, setBottomTabBarHiddenByScroll]);
+
   useLayoutEffect(() => {
     if (!isLatestTab) return;
     restoreCapsuleStripScroll();
@@ -183,18 +251,21 @@ export const HomeScreen: React.FC = () => {
     }
   }, [posts.length, listKey, hasMore, isLoadingMore]);
   
-  // 网格模式滚动处理 - 检测是否滚动到底部
-  const handleGridScroll = useCallback((event: any) => {
-    const { layoutMeasurement, contentOffset, contentSize } = event.nativeEvent;
-    const scrollY = contentOffset.y;
-    const visibleHeight = layoutMeasurement.height;
-    const contentHeight = contentSize.height;
-    
-    // 当滚动到距离底部 200px 时触发加载更多
-    if (scrollY + visibleHeight >= contentHeight - 200) {
-      loadMore();
-    }
-  }, [loadMore]);
+  // 网格模式滚动处理 - 检测是否滚动到底部 + 底部 Tab 显隐
+  const handleGridScroll = useCallback(
+    (event: NativeSyntheticEvent<NativeScrollEvent>) => {
+      handleHomeVerticalScroll(event);
+      const { layoutMeasurement, contentOffset, contentSize } = event.nativeEvent;
+      const scrollY = contentOffset.y;
+      const visibleHeight = layoutMeasurement.height;
+      const contentHeight = contentSize.height;
+
+      if (scrollY + visibleHeight >= contentHeight - 200) {
+        loadMore();
+      }
+    },
+    [handleHomeVerticalScroll, loadMore]
+  );
 
   // 刷新方法 - 先获取正确类型的帖子，再刷新
   const refresh = useCallback(async () => {
@@ -227,10 +298,13 @@ export const HomeScreen: React.FC = () => {
     return posts.map(post => {
       const storePost = postsMap.get(post.id);
       if (storePost) {
-        // 如果 store 中有这个帖子，使用 store 的最新状态
-        return storePost;
+        // store 同步点赞等状态；channel 等列表专用字段在 store 里常缺失，从列表帖合并
+        return {
+          ...post,
+          ...storePost,
+          channel: storePost.channel ?? post.channel,
+        };
       }
-      // 如果 store 中没有这个帖子，使用原始数据
       return post;
     });
   }, [posts, postsMap]);
@@ -281,10 +355,12 @@ export const HomeScreen: React.FC = () => {
     if (!isMobile) {
       return undefined;
     }
+    if (bottomTabBarHiddenByScroll) {
+      return MOBILE_TAB_FLOATING_MARGIN + MOBILE_FAB_GAP + insets.bottom;
+    }
     // TabBar 悬浮在底部，发帖按钮需要在 TabBar 上方
-    // TabBar 高度 64 + TabBar 浮动间距 12 + 按钮与 TabBar 间距 16
     return MOBILE_TAB_BAR_HEIGHT + MOBILE_TAB_FLOATING_MARGIN * 2 + MOBILE_FAB_GAP + insets.bottom;
-  }, [isMobile, insets.bottom]);
+  }, [isMobile, insets.bottom, bottomTabBarHiddenByScroll]);
 
   // 切换视图模式
   const toggleViewMode = () => {
@@ -639,7 +715,7 @@ export const HomeScreen: React.FC = () => {
             }
           ]}
           showsVerticalScrollIndicator={false}
-          scrollEventThrottle={100}
+          scrollEventThrottle={16}
           onScroll={handleGridScroll}
           refreshControl={
             <RefreshControl
@@ -734,6 +810,7 @@ export const HomeScreen: React.FC = () => {
         }
         onEndReached={loadMore}
         onEndReachedThreshold={0.3}
+        onScroll={handleHomeVerticalScroll}
         scrollEventThrottle={16}
         ListEmptyComponent={renderEmpty}
         ListFooterComponent={isLoadingMore ? <Loading size="sm" /> : null}
@@ -783,6 +860,7 @@ export const HomeScreen: React.FC = () => {
           activeIndex={activeIndex}
           onTabChange={changeTab}
           variant="modern"
+          style={styles.homeTabBar}
           rightContent={
             <TouchableOpacity onPress={toggleViewMode} style={styles.viewToggleBtn}>
               <MaterialCommunityIcons
@@ -874,7 +952,8 @@ const styles = StyleSheet.create({
     backgroundColor: colors.background.paper,
   },
   searchWrapper: {
-    paddingBottom: spacing.sm,
+    paddingTop: spacing.lg,
+    paddingBottom: spacing.xs,
     // 移除阴影效果
     shadowColor: 'transparent',
     shadowOffset: { width: 0, height: 0 },
@@ -882,6 +961,10 @@ const styles = StyleSheet.create({
     shadowRadius: 0,
     elevation: 0,
   },
+  homeTabBar: {
+    marginTop: 0,
+    marginBottom: spacing.sm,
+  },
   viewToggleBtn: {
     width: 44,
     height: 44,

src/screens/profile/EditProfileScreen.tsx

@@ -575,11 +575,7 @@ const styles = StyleSheet.create({
     alignItems: 'center',
   },
   coverEditOverlay: {
-    position: 'absolute',
-    top: 0,
-    left: 0,
-    right: 0,
-    height: '60%',
+    ...StyleSheet.absoluteFillObject,
     backgroundColor: 'rgba(0, 0, 0, 0.3)',
     justifyContent: 'center',
     alignItems: 'center',

src/screens/profile/NotificationSettingsScreen.tsx

@@ -13,14 +13,16 @@ import {
 } from 'react-native';
 import { SafeAreaView, useSafeAreaInsets } from 'react-native-safe-area-context';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
-import AsyncStorage from '@react-native-async-storage/async-storage';
 import { colors, spacing, fontSizes, borderRadius } from '../../theme';
 import { Text, ResponsiveContainer } from '../../components/common';
-import { setVibrationEnabled } from '../../services/backgroundService';
+import {
+  loadNotificationPreferences,
+  setPushNotificationsPreference,
+  setSoundPreference,
+  setVibrationPreference,
+} from '../../services/notificationPreferences';
 import { useResponsive } from '../../hooks';
 
-const VIBRATION_ENABLED_KEY = 'vibration_enabled';
-
 interface NotificationSettingItem {
   key: string;
   title: string;
@@ -40,34 +42,48 @@ export const NotificationSettingsScreen: React.FC = () => {
   // 底部间距，避免被 TabBar 遮挡
   const scrollBottomInset = isMobile ? 64 + 24 + insets.bottom + spacing.md : spacing.md;
 
-  // 加载设置
+  // 加载设置（与启动时 hydrate 一致，避免从其它入口进页时 UI 与内存不一致）
   useEffect(() => {
     const loadSettings = async () => {
       try {
-        const vibrationStored = await AsyncStorage.getItem(VIBRATION_ENABLED_KEY);
-        if (vibrationStored !== null) {
-          const enabled = JSON.parse(vibrationStored);
-          setVibrationEnabledState(enabled);
-          setVibrationEnabled(enabled);
-        }
+        const prefs = await loadNotificationPreferences();
+        setVibrationEnabledState(prefs.vibrationEnabled);
+        setPushEnabled(prefs.pushEnabled);
+        setSoundEnabled(prefs.soundEnabled);
       } catch (error) {
-        console.error('加载震动设置失败:', error);
+        console.error('加载通知设置失败:', error);
       }
     };
     loadSettings();
   }, []);
 
-  // 切换震动
   const toggleVibration = async (value: boolean) => {
     try {
       setVibrationEnabledState(value);
-      setVibrationEnabled(value);
-      await AsyncStorage.setItem(VIBRATION_ENABLED_KEY, JSON.stringify(value));
+      await setVibrationPreference(value);
     } catch (error) {
       console.error('保存震动设置失败:', error);
     }
   };
 
+  const togglePush = async (value: boolean) => {
+    try {
+      setPushEnabled(value);
+      await setPushNotificationsPreference(value);
+    } catch (error) {
+      console.error('保存推送开关失败:', error);
+    }
+  };
+
+  const toggleSound = async (value: boolean) => {
+    try {
+      setSoundEnabled(value);
+      await setSoundPreference(value);
+    } catch (error) {
+      console.error('保存提示音设置失败:', error);
+    }
+  };
+
   const settings: NotificationSettingItem[] = [
     {
       key: 'push',
@@ -75,7 +91,7 @@ export const NotificationSettingsScreen: React.FC = () => {
       subtitle: '接收新消息、点赞、评论等推送',
       icon: 'bell-outline',
       value: pushEnabled,
-      onValueChange: setPushEnabled,
+      onValueChange: togglePush,
     },
     {
       key: 'vibration',
@@ -91,7 +107,7 @@ export const NotificationSettingsScreen: React.FC = () => {
       subtitle: '收到新消息时播放提示音',
       icon: 'volume-high',
       value: soundEnabled,
-      onValueChange: setSoundEnabled,
+      onValueChange: toggleSound,
     },
   ];
 

src/services/database.ts

@@ -20,30 +20,61 @@ let writeQueue: Promise<void> = Promise.resolve();
 // 当前数据库对应的用户ID
 let currentDbUserId: string | null = null;
 
+/**
+ * 串行化 open/close，避免并发 initDatabase（如 React Strict Mode 双次 effect、登录与冷启动校验交错）
+ * 导致后完成的 open 覆盖先完成的连接，进而在 Android 上出现 NativeDatabase.execAsync NPE。
+ */
+let dbOpenCloseMutex: Promise<void> = Promise.resolve();
+
+async function withDbOpenCloseLock<T>(fn: () => Promise<T>): Promise<T> {
+  const previous = dbOpenCloseMutex;
+  let release!: () => void;
+  dbOpenCloseMutex = new Promise<void>((resolve) => {
+    release = resolve;
+  });
+  try {
+    await previous;
+    return await fn();
+  } finally {
+    release();
+  }
+}
+
 // 数据库版本，用于迁移
 const DB_VERSION = 2;
 
-/**
- * 初始化用户数据库
- * @param userId 用户ID，用于创建用户专属数据库文件
- */
-export const initDatabase = async (userId?: string): Promise<void> => {
+/** 关闭连接（须在已持有 dbOpenCloseMutex 时调用，或作为 withDbOpenCloseLock 内的实现） */
+const closeDatabaseUnlocked = async (): Promise<void> => {
+  if (db) {
+    try {
+      await db.closeAsync();
+    } catch (error) {
+      console.error('[Database] 关闭数据库失败:', error);
+    }
+    db = null;
+    currentDbUserId = null;
+  }
+};
+
+async function initDatabaseUnlocked(userId?: string): Promise<void> {
+  // 如果指定了用户ID，使用用户专属数据库
+  // 否则使用默认数据库（兼容旧版本）
+  const dbName = userId ? `carrot_bbs_${userId}.db` : 'carrot_bbs.db';
+
+  // 如果存在旧的数据库连接且用户ID变化，需要关闭旧连接
+  if (db && currentDbUserId !== userId) {
+    await closeDatabaseUnlocked();
+  }
+
+  // 如果已经打开了正确的数据库，直接返回
+  if (db && currentDbUserId === userId) {
+    return;
+  }
+
+  let opened: SQLite.SQLiteDatabase | null = null;
   try {
-    // 如果指定了用户ID，使用用户专属数据库
-    // 否则使用默认数据库（兼容旧版本）
-    const dbName = userId ? `carrot_bbs_${userId}.db` : 'carrot_bbs.db';
-    
-    // 如果存在旧的数据库连接且用户ID变化，需要关闭旧连接
-    if (db && currentDbUserId !== userId) {
-      await closeDatabase();
-    }
-    
-    // 如果已经打开了正确的数据库，直接返回
-    if (db && currentDbUserId === userId) {
-      return;
-    }
-    
-    db = await SQLite.openDatabaseAsync(dbName);
+    opened = await SQLite.openDatabaseAsync(dbName);
+    db = opened;
     currentDbUserId = userId || null;
     
     // 创建消息表（包含新字段 seq, status, segments）
@@ -149,26 +180,34 @@ export const initDatabase = async (userId?: string): Promise<void> => {
     await db.execAsync(`
       CREATE INDEX IF NOT EXISTS idx_messages_conversation_seq ON messages(conversationId, seq);
     `);
-    
   } catch (error) {
     console.error('数据库初始化失败:', error);
+    try {
+      if (opened && opened === db) {
+        await opened.closeAsync();
+      }
+    } catch {
+      /* ignore */
+    }
+    db = null;
+    currentDbUserId = null;
     throw error;
   }
+}
+
+/**
+ * 初始化用户数据库
+ * @param userId 用户ID，用于创建用户专属数据库文件
+ */
+export const initDatabase = async (userId?: string): Promise<void> => {
+  return withDbOpenCloseLock(() => initDatabaseUnlocked(userId));
 };
 
 /**
  * 关闭数据库连接
  */
 export const closeDatabase = async (): Promise<void> => {
-  if (db) {
-    try {
-      await db.closeAsync();
-    } catch (error) {
-      console.error('[Database] 关闭数据库失败:', error);
-    }
-    db = null;
-    currentDbUserId = null;
-  }
+  return withDbOpenCloseLock(() => closeDatabaseUnlocked());
 };
 
 /**
@@ -237,39 +276,47 @@ const isRecoverableDbError = (error: unknown): boolean => {
   );
 };
 
-const recoverDbConnection = async (): Promise<SQLite.SQLiteDatabase> => {
-  // 清理当前引用，随后用当前用户上下文重建连接
-  db = null;
-  await initDatabase(currentDbUserId || undefined);
-  return getDb();
+/** 在已持有 dbOpenCloseMutex 时重建连接（禁止在持有 SQLiteDatabase 期间 await 会抢锁的 recoverDbConnection） */
+const reconnectDatabaseUnlocked = async (): Promise<void> => {
+  await closeDatabaseUnlocked();
+  await initDatabaseUnlocked(currentDbUserId || undefined);
 };
 
+/**
+ * 读路径与 init/close/recover 共用同一把锁，避免：
+ * 线程 A 持有 database 引用执行 prepareAsync 时，线程 B 的 recover 关闭连接导致 NPE。
+ */
 const withDbRead = async <T>(operation: (database: SQLite.SQLiteDatabase) => Promise<T>): Promise<T> => {
-  let database = await getDb();
-  try {
-    return await operation(database);
-  } catch (error) {
-    if (!isRecoverableDbError(error)) {
-      throw error;
-    }
-    console.error('数据库读取异常，尝试重连后重试:', error);
-    database = await recoverDbConnection();
-    return operation(database);
-  }
-};
-
-const enqueueWrite = async <T>(operation: () => Promise<T>): Promise<T> => {
-  const wrappedOperation = async () => {
+  return withDbOpenCloseLock(async () => {
     try {
-      return await operation();
+      const database = await getDb();
+      return await operation(database);
     } catch (error) {
       if (!isRecoverableDbError(error)) {
         throw error;
       }
-      console.error('数据库写入异常，尝试重连后重试:', error);
-      await recoverDbConnection();
-      return operation();
+      console.error('数据库读取异常，尝试重连后重试:', error);
+      await reconnectDatabaseUnlocked();
+      const database = await getDb();
+      return await operation(database);
     }
+  });
+};
+
+const enqueueWrite = async <T>(operation: () => Promise<T>): Promise<T> => {
+  const wrappedOperation = async () => {
+    return withDbOpenCloseLock(async () => {
+      try {
+        return await operation();
+      } catch (error) {
+        if (!isRecoverableDbError(error)) {
+          throw error;
+        }
+        console.error('数据库写入异常，尝试重连后重试:', error);
+        await reconnectDatabaseUnlocked();
+        return await operation();
+      }
+    });
   };
   const queued = writeQueue.then(wrappedOperation, wrappedOperation);
   writeQueue = queued.then(() => undefined, () => undefined);
@@ -411,26 +458,24 @@ export const getMessagesBeforeSeq = async (conversationId: string, beforeSeq: nu
 
 // 获取本地消息数量（用于判断是否还有更多历史）
 export const getLocalMessageCountBeforeSeq = async (conversationId: string, beforeSeq: number): Promise<number> => {
-  const database = await getDb();
-  
-  const result = await database.getFirstAsync<{ count: number }>(
-    `SELECT COUNT(*) as count FROM messages WHERE conversationId = ? AND seq < ?`,
-    [conversationId, beforeSeq]
-  );
-  
-  return result?.count || 0;
+  return withDbRead(async (database) => {
+    const result = await database.getFirstAsync<{ count: number }>(
+      `SELECT COUNT(*) as count FROM messages WHERE conversationId = ? AND seq < ?`,
+      [conversationId, beforeSeq]
+    );
+    return result?.count || 0;
+  });
 };
 
 // 获取消息数量
 export const getMessageCount = async (conversationId: string): Promise<number> => {
-  const database = await getDb();
-  
-  const result = await database.getFirstAsync<{ count: number }>(
-    `SELECT COUNT(*) as count FROM messages WHERE conversationId = ?`,
-    [conversationId]
-  );
-  
-  return result?.count || 0;
+  return withDbRead(async (database) => {
+    const result = await database.getFirstAsync<{ count: number }>(
+      `SELECT COUNT(*) as count FROM messages WHERE conversationId = ?`,
+      [conversationId]
+    );
+    return result?.count || 0;
+  });
 };
 
 // 标记消息为已读
@@ -532,13 +577,9 @@ export const saveConversation = async (conversation: {
 
 // 获取所有会话
 export const getAllConversations = async (): Promise<any[]> => {
-  const database = await getDb();
-  
-  const result = await database.getAllAsync<any>(
-    `SELECT * FROM conversations ORDER BY updatedAt DESC`
-  );
-  
-  return result;
+  return withDbRead(async (database) => {
+    return database.getAllAsync<any>(`SELECT * FROM conversations ORDER BY updatedAt DESC`);
+  });
 };
 
 // 更新会话未读数
@@ -587,21 +628,20 @@ export const deleteConversation = async (conversationId: string): Promise<void>
 
 // 搜索消息
 export const searchMessages = async (keyword: string): Promise<CachedMessage[]> => {
-  const database = await getDb();
-  
-  const result = await database.getAllAsync<any>(
-    `SELECT * FROM messages 
-     WHERE content LIKE ? 
-     ORDER BY createdAt DESC 
-     LIMIT 50`,
-    [`%${keyword}%`]
-  );
-  
-  return result.map(msg => ({
-    ...msg,
-    isRead: msg.isRead === 1,
-    segments: msg.segments ? JSON.parse(msg.segments) : undefined,
-  }));
+  return withDbRead(async (database) => {
+    const result = await database.getAllAsync<any>(
+      `SELECT * FROM messages 
+       WHERE content LIKE ? 
+       ORDER BY createdAt DESC 
+       LIMIT 50`,
+      [`%${keyword}%`]
+    );
+    return result.map(msg => ({
+      ...msg,
+      isRead: msg.isRead === 1,
+      segments: msg.segments ? JSON.parse(msg.segments) : undefined,
+    }));
+  });
 };
 
 // ==================== 工具函数 ====================
@@ -611,20 +651,18 @@ export const getDatabaseStats = async (): Promise<{
   totalMessages: number;
   totalConversations: number;
 }> => {
-  const database = await getDb();
-  
-  const msgCount = await database.getFirstAsync<{ count: number }>(
-    `SELECT COUNT(*) as count FROM messages`
-  );
-  
-  const convCount = await database.getFirstAsync<{ count: number }>(
-    `SELECT COUNT(*) as count FROM conversations`
-  );
-  
-  return {
-    totalMessages: msgCount?.count || 0,
-    totalConversations: convCount?.count || 0,
-  };
+  return withDbRead(async (database) => {
+    const msgCount = await database.getFirstAsync<{ count: number }>(
+      `SELECT COUNT(*) as count FROM messages`
+    );
+    const convCount = await database.getFirstAsync<{ count: number }>(
+      `SELECT COUNT(*) as count FROM conversations`
+    );
+    return {
+      totalMessages: msgCount?.count || 0,
+      totalConversations: convCount?.count || 0,
+    };
+  });
 };
 
 // 清空所有数据（用于调试或用户退出登录）
@@ -689,12 +727,13 @@ export const getUserCache = async (userId: string): Promise<UserDTO | null> => {
 };
 
 export const getLatestUserCache = async (): Promise<UserDTO | null> => {
-  const database = await getDb();
-  const row = await database.getFirstAsync<{ data: string }>(
-    `SELECT data FROM users ORDER BY updatedAt DESC LIMIT 1`
-  );
-  if (!row?.data) return null;
-  return safeParseJson<UserDTO>(row.data);
+  return withDbRead(async (database) => {
+    const row = await database.getFirstAsync<{ data: string }>(
+      `SELECT data FROM users ORDER BY updatedAt DESC LIMIT 1`
+    );
+    if (!row?.data) return null;
+    return safeParseJson<UserDTO>(row.data);
+  });
 };
 
 export const saveCurrentUserCache = async (user: UserDTO): Promise<void> => {

src/services/notificationPreferences.ts

@@ -0,0 +1,94 @@
+/**
+ * 通知相关本地偏好（推送开关、提示音、震动）
+ * 启动时 loadNotificationPreferences 会同步到内存，供 SSE / 系统通知 / Handler 读取
+ */
+
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import * as Notifications from 'expo-notifications';
+import { setVibrationEnabled } from './messageVibrationService';
+
+export const NOTIFICATION_PREF_KEYS = {
+  /** 与历史版本保持一致 */
+  vibration: 'vibration_enabled',
+  push: 'notification_push_enabled',
+  sound: 'notification_sound_enabled',
+} as const;
+
+export type NotificationPrefs = {
+  pushEnabled: boolean;
+  soundEnabled: boolean;
+  vibrationEnabled: boolean;
+};
+
+const defaults: NotificationPrefs = {
+  pushEnabled: true,
+  soundEnabled: true,
+  vibrationEnabled: true,
+};
+
+let cached: NotificationPrefs = { ...defaults };
+
+export function getNotificationPreferencesSync(): NotificationPrefs {
+  return { ...cached };
+}
+
+function parseBool(raw: string | null, fallback: boolean): boolean {
+  if (raw === null) return fallback;
+  try {
+    return JSON.parse(raw) as boolean;
+  } catch {
+    return fallback;
+  }
+}
+
+/** 应用启动时调用：从 AsyncStorage 恢复并写入震动服务内存态 */
+export async function loadNotificationPreferences(): Promise<NotificationPrefs> {
+  try {
+    const [vibrationRaw, pushRaw, soundRaw] = await Promise.all([
+      AsyncStorage.getItem(NOTIFICATION_PREF_KEYS.vibration),
+      AsyncStorage.getItem(NOTIFICATION_PREF_KEYS.push),
+      AsyncStorage.getItem(NOTIFICATION_PREF_KEYS.sound),
+    ]);
+    cached = {
+      vibrationEnabled: parseBool(vibrationRaw, defaults.vibrationEnabled),
+      pushEnabled: parseBool(pushRaw, defaults.pushEnabled),
+      soundEnabled: parseBool(soundRaw, defaults.soundEnabled),
+    };
+    setVibrationEnabled(cached.vibrationEnabled);
+    return { ...cached };
+  } catch {
+    return { ...cached };
+  }
+}
+
+export async function setVibrationPreference(enabled: boolean): Promise<void> {
+  cached.vibrationEnabled = enabled;
+  setVibrationEnabled(enabled);
+  await AsyncStorage.setItem(NOTIFICATION_PREF_KEYS.vibration, JSON.stringify(enabled));
+}
+
+export async function setPushNotificationsPreference(enabled: boolean): Promise<void> {
+  cached.pushEnabled = enabled;
+  await AsyncStorage.setItem(NOTIFICATION_PREF_KEYS.push, JSON.stringify(enabled));
+}
+
+export async function setSoundPreference(enabled: boolean): Promise<void> {
+  cached.soundEnabled = enabled;
+  await AsyncStorage.setItem(NOTIFICATION_PREF_KEYS.sound, JSON.stringify(enabled));
+}
+
+/** 注册 expo-notifications 展示策略（读取内存缓存，切换开关后立即生效） */
+export function registerNotificationPresentationHandler(): void {
+  Notifications.setNotificationHandler({
+    handleNotification: async () => {
+      const p = getNotificationPreferencesSync();
+      return {
+        shouldShowAlert: p.pushEnabled,
+        shouldPlaySound: p.soundEnabled,
+        shouldSetBadge: true,
+        shouldShowBanner: p.pushEnabled,
+        shouldShowList: p.pushEnabled,
+      };
+    },
+  });
+}

src/services/sseService.ts

@@ -4,6 +4,7 @@ import EventSource from 'react-native-sse';
 import { api, SSE_URL } from './api';
 import { MessageCategory, SystemMessageType, SystemMessageExtraData, MessageSegment } from '../types/dto';
 import { systemNotificationService } from './systemNotificationService';
+import { getNotificationPreferencesSync } from './notificationPreferences';
 import { vibrateOnMessage } from './messageVibrationService';
 
 export type WSMessageType =
@@ -384,7 +385,9 @@ class SSEService {
         created_at: payload.created_at || new Date().toISOString(),
       };
       this.emit('notification', m);
-      vibrateOnMessage('notification').catch(() => {});
+      if (getNotificationPreferencesSync().pushEnabled) {
+        vibrateOnMessage('notification').catch(() => {});
+      }
       systemNotificationService.handleWSMessage(m as any).catch(() => {});
     }
   }

src/services/systemNotificationService.ts

@@ -8,6 +8,7 @@ import * as Notifications from 'expo-notifications';
 import { Platform, AppState, AppStateStatus } from 'react-native';
 import type { WSChatMessage, WSNotificationMessage, WSAnnouncementMessage } from './sseService';
 import { extractTextFromSegments } from '../types/dto';
+import { getNotificationPreferencesSync } from './notificationPreferences';
 
 // 通知渠道配置
 const CHANNEL_ID = 'default';
@@ -71,17 +72,6 @@ class SystemNotificationService {
         return false;
       }
 
-      // 设置 notification handler，确保前台也能显示通知、播放声音和震动
-      Notifications.setNotificationHandler({
-        handleNotification: async () => ({
-          shouldShowAlert: true,
-          shouldPlaySound: true,
-          shouldSetBadge: true,
-          shouldShowBanner: true,
-          shouldShowList: true,
-        }),
-      });
-
       if (Platform.OS === 'android') {
         await Notifications.setNotificationChannelAsync(CHANNEL_ID, {
           name: CHANNEL_NAME,
@@ -120,15 +110,16 @@ class SystemNotificationService {
       // 使用 scheduleNotificationAsync 立即显示通知
       // 配合 setNotificationHandler 确保前台也能显示
       
+      const { vibrationEnabled } = getNotificationPreferencesSync();
       // 构建通知内容
       const content: Notifications.NotificationContentInput = {
         title: options.title,
         body: options.body,
         data: options.data as Record<string, string | number | object> | undefined,
-        // 显式设置震动（仅 Android 生效）
-        ...(Platform.OS === 'android' ? {
-          vibrationPattern: [0, 300, 200, 300],
-        } : {}),
+        // 显式设置震动（仅 Android 生效，且尊重「消息震动」开关）
+        ...(Platform.OS === 'android' && vibrationEnabled
+          ? { vibrationPattern: [0, 300, 200, 300] }
+          : {}),
       };
 
       const notificationId = await Notifications.scheduleNotificationAsync({
@@ -179,6 +170,9 @@ class SystemNotificationService {
   }
 
   async handleWSMessage(message: WSChatMessage | WSNotificationMessage | WSAnnouncementMessage): Promise<void> {
+    if (!getNotificationPreferencesSync().pushEnabled) {
+      return;
+    }
     // 仅在后台时显示通知，前台时不显示（用户正在使用应用，可以直接看到消息）
     if (this.currentAppState !== 'active') {
       // 判断是否是聊天消息（通过 segments 字段）

src/stores/homeTabBarVisibilityStore.ts

@@ -0,0 +1,12 @@
+import { create } from 'zustand';
+
+interface HomeTabBarVisibilityState {
+  /** 首页列表下滑时隐藏底部 Tab，上滑或闲置后恢复 */
+  bottomTabBarHiddenByScroll: boolean;
+  setBottomTabBarHiddenByScroll: (hidden: boolean) => void;
+}
+
+export const useHomeTabBarVisibilityStore = create<HomeTabBarVisibilityState>((set) => ({
+  bottomTabBarHiddenByScroll: false,
+  setBottomTabBarHiddenByScroll: (hidden) => set({ bottomTabBarHiddenByScroll: hidden }),
+}));

src/stores/index.ts

@@ -42,6 +42,9 @@ export { enrichGroupMembersWithUserProfiles } from './groupMemberProfileResolver
 export { postManager } from './postManager';
 export { groupManager } from './groupManager';
 export { userManager } from './userManager';
+export {
+  useHomeTabBarVisibilityStore,
+} from './homeTabBarVisibilityStore';
 export {
   useConversations as useMessageManagerConversations,
   useMessages,