Refactor components and enhance background task management

- Updated font sizes and weights in BasalMetabolismCard, MoodCard, HealthDataCard, and NutritionRadarCard for improved readability.
- Removed loading state from MoodCard to simplify the component.
- Adjusted styles in WeightHistoryCard for better layout and spacing.
- Integrated expo-background-fetch for improved background task handling.
- Updated Info.plist to include background fetch capability.
- Enhanced background task registration and execution logic in backgroundTaskManager.
- Added debug function to manually trigger background task execution for testing purposes.

services/backgroundTaskManager.ts

@@ -1,5 +1,5 @@
 import AsyncStorage from '@react-native-async-storage/async-storage';
-import * as ExpoBackgroundTask from 'expo-background-task';
+import * as BackgroundFetch from 'expo-background-fetch';
 import * as TaskManager from 'expo-task-manager';
 
 // 任务类型定义
@@ -63,13 +63,17 @@ class BackgroundTaskManager {
 
   // 注册后台任务
   private async registerBackgroundTask(): Promise<void> {
-    const BACKGROUND_TASK = 'background-task';
+    const BACKGROUND_FETCH_TASK = 'background-fetch-task';
 
-    console.log('注册后台任务');
-    // 定义后台任务
-    TaskManager.defineTask(BACKGROUND_TASK, async () => {
+    console.log('注册后台获取任务');
+    
+    // 定义后台获取任务
+    TaskManager.defineTask(BACKGROUND_FETCH_TASK, async () => {
+      console.log('后台获取任务被系统调用');
+      const now = new Date();
+      
       try {
-        console.log('开始执行后台任务');
+        console.log(`开始执行后台任务 - ${now.toISOString()}`);
         
         // 执行所有注册的任务
         const results = await this.executeAllTasks();
@@ -77,19 +81,29 @@ class BackgroundTaskManager {
         console.log('后台任务执行完成:', results);
         
         // 返回成功状态
-        return ExpoBackgroundTask.BackgroundTaskResult.Success;
+        return BackgroundFetch.BackgroundFetchResult.NewData;
       } catch (error) {
         console.error('后台任务执行失败:', error);
-        return ExpoBackgroundTask.BackgroundTaskResult.Failed;
+        return BackgroundFetch.BackgroundFetchResult.Failed;
       }
     });
 
-    // 注册后台任务
-    await ExpoBackgroundTask.registerTaskAsync(BACKGROUND_TASK, {
-      minimumInterval: 15, // 最小间隔60分钟
-    });
-
-    console.log('后台任务注册成功');
+    // 注册后台获取任务
+    try {
+      const status = await BackgroundFetch.getStatusAsync();
+      if (status === BackgroundFetch.BackgroundFetchStatus.Available) {
+        await BackgroundFetch.registerTaskAsync(BACKGROUND_FETCH_TASK, {
+          minimumInterval: 15 * 60, // 15分钟（以秒为单位）
+          stopOnTerminate: false,
+          startOnBoot: true,
+        });
+        console.log('后台获取任务注册成功');
+      } else {
+        console.warn('后台获取不可用，状态:', status);
+      }
+    } catch (error) {
+      console.error('注册后台获取任务失败:', error);
+    }
   }
 
   // 注册自定义任务
@@ -212,8 +226,8 @@ class BackgroundTaskManager {
   }
 
   // 检查后台任务状态
-  public async getBackgroundTaskStatus(): Promise<ExpoBackgroundTask.BackgroundTaskStatus | null> {
-    return await ExpoBackgroundTask.getStatusAsync();
+  public async getBackgroundTaskStatus(): Promise<BackgroundFetch.BackgroundFetchStatus | null> {
+    return await BackgroundFetch.getStatusAsync();
   }
 
   // 保存任务状态到本地存储
@@ -254,6 +268,42 @@ class BackgroundTaskManager {
     
     await this.saveTaskStatuses();
   }
+
+  // 调试函数：强制触发后台任务执行
+  public async debugExecuteBackgroundTask(): Promise<void> {
+    console.log('=== 调试：手动触发后台任务执行 ===');
+    
+    try {
+      // 获取后台任务状态
+      const status = await this.getBackgroundTaskStatus();
+      console.log('后台获取状态:', status);
+      
+      // 执行所有注册的任务
+      console.log('当前注册的任务数量:', this.tasks.size);
+      this.tasks.forEach((task, id) => {
+        console.log(`- 任务ID: ${id}, 名称: ${task.name}`);
+      });
+      
+      const results = await this.executeAllTasks();
+      console.log('任务执行结果:', results);
+      
+      // 显示任务状态
+      const taskStatuses = this.getAllTaskStatuses();
+      taskStatuses.forEach(status => {
+        console.log(`任务 ${status.id} 状态:`, {
+          isRegistered: status.isRegistered,
+          executionCount: status.executionCount,
+          lastExecution: status.lastExecution?.toISOString(),
+          lastError: status.lastError
+        });
+      });
+      
+    } catch (error) {
+      console.error('调试执行失败:', error);
+    }
+    
+    console.log('=== 调试执行完成 ===');
+  }
 }
 
 // 导出单例实例