refactor(ImageGallery, HomeScreen, PostService, UserStore): streamline post type handling and improve tab navigation

- Updated ImageGallery to manage loading states more effectively and prevent unnecessary updates.
- Refactored HomeScreen to remove the 'recommend' post type, simplifying the post type options.
- Adjusted PostService and UserStore to eliminate references to 'recommend', ensuring consistency across the application.
- Enhanced tab navigation in SimpleMobileTabNavigator to optimize rendering and manage mounted tabs more efficiently.
- Improved error handling and loading states in various components for better user experience.

src/types/dto.ts

@@ -482,8 +482,8 @@ export interface CursorPaginationRequest {
   direction?: 'forward' | 'backward';
   /** 每页数量（默认 20，最大 100） */
   page_size?: number;
-  /** 帖子类型筛选（可选）：recommend, follow, hot, latest */
-  post_type?: 'recommend' | 'follow' | 'hot' | 'latest';
+  /** 帖子类型筛选（可选）：follow, hot, latest */
+  post_type?: 'follow' | 'hot' | 'latest';
 }
 
 /**