feat(content): add rich content rendering with @mentions and vote segments

- Add PostContentRenderer component for rendering posts/comments with segments
- Add PostMentionInput component for @mention support in post/comment creation
- Add VoteSegmentData and vote segment type for unified post creation API
- Update post and comment services to support segments in API requests
- Fix auth service to clear tokens before login/register
- Improve database initialization with proper close/retry logic
- Add verification check before allowing post creation
- Add metro web shims for react-native-webrtc full package and requireNativeComponent
- Update build config with git hash based version numbers

src/services/auth/authService.ts

@@ -149,6 +149,9 @@ class AuthService {
 
   // 用户登录（只管 API + Token，DB 操作交给 authStore）
   async login(data: LoginRequest): Promise<AuthResponse> {
+    await api.clearToken();
+    api.resetAuthState();
+
     const response = await api.post<AuthResponse>('/auth/login', data);
 
     if (!response.data) {
@@ -161,13 +164,15 @@ class AuthService {
     if (refreshToken) {
       await api.setRefreshToken(refreshToken);
     }
-    api.resetAuthState();
 
     return response.data;
   }
 
   // 用户注册（只管 API + Token，DB 操作交给 authStore）
   async register(data: RegisterRequest): Promise<AuthResponse> {
+    await api.clearToken();
+    api.resetAuthState();
+
     const response = await api.post<AuthResponse>('/auth/register', data);
 
     if (!response.data) {
@@ -180,7 +185,6 @@ class AuthService {
     if (refreshToken) {
       await api.setRefreshToken(refreshToken);
     }
-    api.resetAuthState();
 
     return response.data;
   }