feat(auth): enhance login error handling with detailed error code mapping

- Add backend error_code support (INVALID_CREDENTIALS, USER_BANNED, etc.)
- Improve network error detection with code=0 fallback
- Add granular HTTP status code handling (400, 401, 403, 429, 5xx)
- Update LoginScreen to display authStore error or generic message
- Include notification service improvements:
  - Keep JPush connection alive in background via setKeepLongConnInBackground
  - Add manual sound/vibration for local notifications via preferences
- Fix SearchScreen layout by accounting for floating tab bar and safe area

src/services/notification/jpushService.ts

@@ -1,4 +1,4 @@
-import { Platform, NativeModules, AppState } from 'react-native';
+import { Platform, NativeModules, AppState, Vibration } from 'react-native';
 import { pushService } from './pushService';
 import * as Notifications from 'expo-notifications';
 import { getNotificationPreferencesSync } from './notificationPreferences';
@@ -112,6 +112,9 @@ class JPushService {
       // Register listeners only once (idempotent guard)
       this._registerListeners();
 
+      // 退后台保持极光长连接，确保推送实时到达
+      this._setBackgroundKeepLongConn(true);
+
       // 初始化 SDK
       JPush!.init({
         appKey: jpushAppKey,
@@ -165,12 +168,12 @@ class JPushService {
       console.warn('[JPush] setChannelAndSound failed:', error);
     }
 
+    // Ensure notification channel has sound & vibration enabled via expo-notifications
     try {
       Notifications.setNotificationChannelAsync('jpush_notification', {
         name: '推送通知',
         importance: Notifications.AndroidImportance.HIGH,
         vibrationPattern: [0, 250, 250, 250],
-        sound: 'default',
         enableLights: true,
         showBadge: true,
       });
@@ -179,6 +182,30 @@ class JPushService {
     }
   }
 
+  /**
+   * 设置退后台是否保持极光长连接
+   * @see https://docs.jiguang.cn/jpush/client/Android/android_api#退后台是否保持极光长连接-api
+   */
+  private _setBackgroundKeepLongConn(keep: boolean): void {
+    if (!JPush) return;
+    try {
+      if (Platform.OS === 'android') {
+        const jpushModule = NativeModules.JPushModule;
+        if (jpushModule?.setKeepLongConnInBackground) {
+          jpushModule.setKeepLongConnInBackground(keep);
+          console.log('[JPush] setKeepLongConnInBackground:', keep);
+        } else {
+          console.warn('[JPush] setKeepLongConnInBackground not available in native module');
+        }
+      } else if (Platform.OS === 'ios') {
+        JPush.setBackgroundEnable(keep);
+        console.log('[JPush] setBackgroundEnable:', keep);
+      }
+    } catch (error) {
+      console.warn('[JPush] setBackgroundKeepLongConn failed:', error);
+    }
+  }
+
   private _fetchRegistrationID(): void {
     if (!JPush) return;
     JPush.getRegistrationID((result: any) => {
@@ -329,6 +356,21 @@ class JPushService {
       } else {
         JPush.addLocalNotification(params);
       }
+
+      // JPush local notification does not support sound/vibration directly.
+      // Trigger them manually based on user preferences.
+      const prefs = getNotificationPreferencesSync();
+      if (prefs.soundEnabled) {
+        // Play system default notification sound via a silent expo-notification
+        Notifications.scheduleNotificationAsync({
+          content: { title: '', body: '', sound: true, vibrate: [] },
+          trigger: null,
+        }).catch(() => {});
+      }
+      if (prefs.vibrationEnabled) {
+        // Use React Native Vibration API for device-level vibration
+        Vibration.vibrate([0, 250, 250, 250]);
+      }
     } catch (error) {
       console.error('[JPush] addLocalNotification failed:', error);
     }

src/services/notification/systemNotificationService.ts

@@ -208,9 +208,6 @@ class SystemNotificationService {
 
   async clearAllNotifications(): Promise<void> {
     jpushService.clearAllNotifications();
-    if (Platform.OS === 'web' && 'Notification' in window) {
-      // No programmatic way to clear browser notifications
-    }
   }
 
   async clearBadge(): Promise<void> {