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/screens/message/components/ChatScreen/MessageBubble.tsx

@@ -427,7 +427,7 @@ const MessageBubbleInner: React.FC<MessageBubbleProps> = ({
           <View style={[styles.messageContent, isMe ? styles.myMessageContentPanel : null]}>
             {/* 群聊模式：显示发送者昵称 */}
             {isGroupChat && senderInfo && (
-              <Text style={[styles.senderName, isMe && styles.mySenderName]}>{senderInfo.nickname}</Text>
+              <Text style={[styles.senderName, isMe ? styles.mySenderName : {}]}>{senderInfo.nickname}</Text>
             )}
 
             {renderMessageContent()}