fix(web): prevent UI flash by preserving user state in fetchMe and removing CSS pulse

web/src/components/VersionNotifier.tsx

@@ -45,7 +45,7 @@ export function VersionNotifier() {
   if (!updateAvailable) return null;
 
   return (
-    <div className="bg-gb-accent text-gb-bg-h px-4 py-2 text-xs font-semibold flex items-center justify-between shadow-lg z-50 animate-pulse">
+    <div className="bg-gb-accent text-gb-bg-h px-4 py-2 text-xs font-semibold flex items-center justify-between shadow-lg z-50">
       <span>🚀 A new update is available! ({serverVersion})</span>
       <button
         onClick={handleReload}

web/src/stores/auth.ts

@@ -84,7 +84,7 @@ function autoSubscribePush() {
   });
 }
 
-export const useAuthStore = create<AuthState>((set) => ({
+export const useAuthStore = create<AuthState>((set, get) => ({
   user: null,
   isAuthenticated: false,
   isLoading: false,
@@ -146,7 +146,9 @@ export const useAuthStore = create<AuthState>((set) => ({
   },
 
   fetchMe: async () => {
-    set({ isLoading: true, error: null });
+    if (!get().user) {
+      set({ isLoading: true, error: null });
+    }
     try {
       const user = await api.get<User>(`/auth/me?t=${Date.now()}`);
       set({ user, isAuthenticated: true, isLoading: false });

web/src/stores/ws.ts

@@ -125,7 +125,6 @@ export const useWebSocketStore = create<WebSocketState>((set, get) => ({
 
       if (data.type === 'error') {
         console.error('ws error:', data);
-        useAuthStore.getState().fetchMe();
         socket.close();
         return;
       }