feat(i18n): 添加国际化支持和中英文切换功能

- 实现完整的中英文国际化系统，支持动态语言切换
- 新增健康数据权限说明页面，提供HealthKit数据使用说明
- 为服药记录添加庆祝动画效果，提升用户体验
- 优化药品添加页面的阴影效果和视觉层次
- 更新个人页面以支持多语言显示和语言选择模态框

package.json

@@ -37,6 +37,7 @@
     "expo-image-picker": "~17.0.8",
     "expo-linear-gradient": "~15.0.7",
     "expo-linking": "~8.0.8",
+    "expo-localization": "^17.0.7",
     "expo-media-library": "^18.2.0",
     "expo-notifications": "~0.32.12",
     "expo-quick-actions": "^6.0.0",
@@ -48,10 +49,12 @@
     "expo-system-ui": "~6.0.8",
     "expo-task-manager": "~14.0.8",
     "expo-web-browser": "~15.0.7",
+    "i18next": "^25.6.2",
     "lodash": "^4.17.21",
     "lottie-react-native": "^7.3.4",
     "react": "19.1.0",
     "react-dom": "19.1.0",
+    "react-i18next": "^16.3.0",
     "react-native": "0.81.5",
     "react-native-chart-kit": "^6.12.0",
     "react-native-device-info": "^14.0.4",