修复头像未更新的问题

lib/provider/user_provider.dart

@@ -108,7 +108,7 @@ class UserProvider extends ChangeNotifier {
         },
         showMessage: true,
       );
-      await updateProfile();
+      _profileModel = await updateProfile();
       cancel();
       notifyListeners();
     }

lib/ui/widgets/app_widgets/aku_avatar.dart

@@ -27,6 +27,7 @@ class AkuAvatar extends StatelessWidget {
               image: API.image(userProvider.profileModel.firstImg?.url ?? ''),
               height: size ?? 72.w,
               width: size ?? 72.w,
+              fit: BoxFit.cover,
             ),
           )
         : CircleAvatar(