refactor(home): redesign home screen with sort bar and add recommendation feed

- Replace PagerView-based tabs with modern sort bar navigation
- Add "推荐" (recommended) feed option with "hot" sort type
- Update tab icons and labels to match new sort paradigm
- Optimize PostCard, MessageBubble conditional styles

perf(chat): migrate FlatList to FlashList for emoji/sticker panels

- Improve virtualized rendering performance for emoji and sticker grids
- Fix jump-to-latest scroll behavior for inverted FlashList

perf(profile): extract user header and tab bar into separate memoized renders

- Prevent unnecessary re-renders when switching tabs

feat(api): add channel_id filter support for post queries

- Include channel_id in cursor pagination requests
- Update CursorPaginationRequest type definition

style(chat-info): redesign group and private chat info screens with flat layout

- Remove card borders and shadows for cleaner appearance
- Adjust avatar sizes and spacing for consistency

src/types/dto.ts

@@ -520,14 +520,11 @@ export type DeviceType = 'ios' | 'android' | 'web';
  * 游标分页请求参数
  */
 export interface CursorPaginationRequest {
-  /** 游标字符串（可选，首次请求不传） */
   cursor?: string;
-  /** 分页方向：forward 或 backward（默认 forward） */
   direction?: 'forward' | 'backward';
-  /** 每页数量（默认 20，最大 100） */
   page_size?: number;
-  /** 帖子类型筛选（可选）：follow, hot, latest */
   post_type?: 'follow' | 'hot' | 'latest';
+  channel_id?: string;
 }
 
 /**