feat(infrastructure): add pagination, cache, and sync infrastructure

- Add pagination infrastructure with usePagination and usePaginationManager hooks
- Add connection state management hook for network status tracking
- Add media caching infrastructure with useMediaCache hook
- Add differential message synchronization infrastructure
- Export new hooks from central index file
- Remove backup file MainNavigator.tsx.bak

src/hooks/index.ts

@@ -71,3 +71,24 @@ export {
   prefetchMessageScreen,
   prefetchHomeScreen,
 } from './usePrefetch';
+
+// ==================== 分页 Hooks ====================
+export {
+  usePagination,
+  usePaginationManager,
+} from './usePagination';
+
+export type {
+  UsePaginationOptions,
+  UsePaginationReturn,
+} from './usePagination';
+
+// ==================== 连接状态 Hooks ====================
+export { useConnectionState } from './useConnectionState';
+
+export type { UseConnectionStateResult } from './useConnectionState';
+
+// ==================== 媒体缓存 Hooks ====================
+export { useMediaCache } from './useMediaCache';
+
+export type { UseMediaCacheReturn } from './useMediaCache';