feat: add QR code login and enhance chat experience

- Add QR code login flow with scanner and confirmation screens
- Implement swipe-to-reply in chat with SwipeableMessageBubble
- Replace FlatList with FlashList for chat performance optimization
- Add Schedule stack navigator with CourseDetail screen support
- Configure deep linking for QR code login (carrotbbs://qrcode/login/:sessionId)
- Update branding from 胡萝卜 to 萝卜社区
- Display dynamic app version in settings

src/screens/auth/LoginScreen.tsx

@@ -188,7 +188,7 @@ export const LoginScreen: React.FC = () => {
       </View>
       
       {/* 品牌名称 - 优化大屏排版 */}
-      <Text style={[styles.appName, isSplitLayout && styles.splitAppName]}>胡萝卜</Text>
+      <Text style={[styles.appName, isSplitLayout && styles.splitAppName]}>萝卜社区</Text>
       <Text style={[styles.subtitle, isSplitLayout && styles.splitSubtitle]}>发现有趣的内容，结识志同道合的朋友</Text>
       
       {/* 装饰元素 - 大屏模式改为水平排列 + 大幅放大 */}
@@ -431,7 +431,7 @@ export const LoginScreen: React.FC = () => {
                   color="#FFF" 
                 />
               </View>
-              <Text style={[styles.appName, { fontSize: appNameSize }]}>胡萝卜</Text>
+              <Text style={[styles.appName, { fontSize: appNameSize }]}>萝卜社区</Text>
               <Text style={styles.subtitle}>发现有趣的内容，结识志同道合的朋友</Text>
             </Animated.View>