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.

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）