Refactor: Remove background task management and related hooks

- Deleted `useBackgroundTasks.ts` hook and its associated logic for managing background tasks.
- Removed `backgroundTaskManager.ts` service and all related task definitions and registrations.
- Cleaned up `Podfile.lock` and `package.json` to remove unused dependencies related to background tasks.
- Updated iOS project files to eliminate references to removed background task components.
- Added new background fetch identifier in `Info.plist` for future use.

hooks/useBackgroundTasks.ts

@@ -1,110 +0,0 @@
-import { BackgroundTaskConfig, backgroundTaskManager, TaskStatus } from '@/services/backgroundTaskManager';
-import * as BackgroundTask from 'expo-background-task';
-import { useCallback, useEffect, useState } from 'react';
-
-export interface UseBackgroundTasksReturn {
-  // 状态
-  isInitialized: boolean;
-  taskStatuses: TaskStatus[];
-  registeredTasks: BackgroundTaskConfig[];
-  
-  // 方法
-  registerTask: (task: BackgroundTaskConfig) => Promise<void>;
-  unregisterTask: (taskId: string) => Promise<void>;
-  executeTask: (taskId: string, data?: any) => Promise<void>;
-  executeAllTasks: () => Promise<{ [taskId: string]: 'success' | 'failed' }>;
-  getTaskStatus: (taskId: string) => TaskStatus | undefined;
-  cleanupTaskStatuses: () => Promise<void>;
-  
-  // 后台任务状态
-  backgroundTaskStatus: BackgroundTask.BackgroundTaskStatus | null;
-  getBackgroundTaskStatus: () => Promise<void>;
-}
-
-export const useBackgroundTasks = (): UseBackgroundTasksReturn => {
-  const [isInitialized, setIsInitialized] = useState(false);
-  const [taskStatuses, setTaskStatuses] = useState<TaskStatus[]>([]);
-  const [registeredTasks, setRegisteredTasks] = useState<BackgroundTaskConfig[]>([]);
-  const [backgroundTaskStatus, setBackgroundTaskStatus] = useState<BackgroundTask.BackgroundTaskStatus | null>(null);
-
-  // 初始化
-  useEffect(() => {
-    const initialize = async () => {
-      try {
-        await backgroundTaskManager.initialize();
-        setIsInitialized(true);
-        refreshData();
-      } catch (error) {
-        console.error('初始化后台任务失败:', error);
-      }
-    };
-
-    initialize();
-  }, []);
-
-  // 刷新数据
-  const refreshData = useCallback(() => {
-    setTaskStatuses(backgroundTaskManager.getAllTaskStatuses());
-    setRegisteredTasks(backgroundTaskManager.getRegisteredTasks());
-  }, []);
-
-  // 注册任务
-  const registerTask = useCallback(async (task: BackgroundTaskConfig) => {
-    await backgroundTaskManager.registerTask(task);
-    refreshData();
-  }, [refreshData]);
-
-  // 取消注册任务
-  const unregisterTask = useCallback(async (taskId: string) => {
-    await backgroundTaskManager.unregisterTask(taskId);
-    refreshData();
-  }, [refreshData]);
-
-  // 执行任务
-  const executeTask = useCallback(async (taskId: string, data?: any) => {
-    await backgroundTaskManager.executeTask(taskId, data);
-    refreshData();
-  }, [refreshData]);
-
-  // 执行所有任务
-  const executeAllTasks = useCallback(async () => {
-    const results = await backgroundTaskManager.executeAllTasks();
-    refreshData();
-    return results;
-  }, [refreshData]);
-
-  // 获取任务状态
-  const getTaskStatus = useCallback((taskId: string) => {
-    return backgroundTaskManager.getTaskStatus(taskId);
-  }, []);
-
-  // 清理任务状态
-  const cleanupTaskStatuses = useCallback(async () => {
-    await backgroundTaskManager.cleanupTaskStatuses();
-    refreshData();
-  }, [refreshData]);
-
-  // 获取后台任务状态
-  const getBackgroundTaskStatus = useCallback(async () => {
-    try {
-      const status = await backgroundTaskManager.getBackgroundTaskStatus();
-      setBackgroundTaskStatus(status);
-    } catch (error) {
-      console.error('获取后台任务状态失败:', error);
-    }
-  }, []);
-
-  return {
-    isInitialized,
-    taskStatuses,
-    registeredTasks,
-    registerTask,
-    unregisterTask,
-    executeTask,
-    executeAllTasks,
-    getTaskStatus,
-    cleanupTaskStatuses,
-    backgroundTaskStatus,
-    getBackgroundTaskStatus,
-  };
-};