feat: 集成expo-background-task和expo-task-manager，重构后台任务管理，添加健康提醒功能，优化任务执行逻辑

package.json

@@ -43,13 +43,13 @@
     "expo-status-bar": "~2.2.3",
     "expo-symbols": "~0.4.5",
     "expo-system-ui": "~5.0.11",
+    "expo-task-manager": "~13.1.6",
     "expo-web-browser": "~14.2.0",
     "lodash": "^4.17.21",
     "lottie-react-native": "^7.3.4",
     "react": "19.0.0",
     "react-dom": "19.0.0",
     "react-native": "0.79.5",
-    "react-native-background-fetch": "^4.2.8",
     "react-native-cos-sdk": "^1.2.1",
     "react-native-device-info": "^14.0.4",
     "react-native-exit-app": "^2.0.0",
@@ -69,7 +69,8 @@
     "react-native-web": "~0.20.0",
     "react-native-webview": "13.13.5",
     "react-native-wheel-picker-expo": "^0.5.4",
-    "react-redux": "^9.2.0"
+    "react-redux": "^9.2.0",
+    "expo-background-task": "~0.2.8"
   },
   "devDependencies": {
     "@babel/core": "^7.25.2",