AI助手优化-头像和对话功能

lib/providers/auth_provider.dart

@@ -41,11 +41,26 @@ class AuthNotifier extends Notifier<AuthState> {
     final user = UserInfo(
       username: response.username ?? '',
       nickname: response.nickname ?? response.username ?? '',
+      avatar: response.avatar,
     );
     await LocalStorage.instance.setAuth(token: response.token, userInfo: user.toJson());
     state = AuthState(token: response.token, user: user);
   }
 
+  /// 改完资料后刷新本地缓存的用户信息。
+  ///
+  /// 不发新 token —— 后端返回的 [AuthResponse.token] 是 null，
+  /// 所以这里保留原来的 token，只换 user。
+  Future<void> updateUserFromResponse(AuthResponse response) async {
+    final user = UserInfo(
+      username: response.username ?? state.user?.username ?? '',
+      nickname: response.nickname ?? state.user?.nickname ?? '',
+      avatar: response.avatar,
+    );
+    await LocalStorage.instance.setUserInfo(user.toJson());
+    state = AuthState(token: state.token, user: user);
+  }
+
   Future<void> logout() async {
     await LocalStorage.instance.clearAuth();
     state = const AuthState.initial();