fix(auth): prevent concurrent dispatch deadlocks and add timeout to UserContext

src/contexts/UserContext.tsx

@@ -87,13 +87,30 @@ export const UserProvider: React.FC<{ children: ReactNode }> = ({ children }) =>
 
     useEffect(() => {
         let mounted = true;
+        let isFetching = false; // Prevent concurrent deadlocks
 
         const handleSession = async (session: any) => {
+            if (isFetching) return;
+            isFetching = true;
+
             if (session?.user) {
-                await fetchUserProfile(session.user.id, session.user.email);
+                // Promise.race to guarantee we escape infinite loading if Supabase POST/GET hangs
+                const timeout = new Promise<void>((_, reject) => setTimeout(() => reject(new Error("DB Timeout")), 8000));
+                try {
+                    await Promise.race([
+                        fetchUserProfile(session.user.id, session.user.email),
+                        timeout
+                    ]);
+                } catch (e) {
+                    console.error("UserContext HandleSession Error:", e);
+                    if (mounted) setLoading(false);
+                } finally {
+                    isFetching = false;
+                }
             } else {
                 setUser(null);
-                setLoading(false);
+                if (mounted) setLoading(false);
+                isFetching = false;
             }
         };
 
@@ -110,21 +127,20 @@ export const UserProvider: React.FC<{ children: ReactNode }> = ({ children }) =>
                 setIsAdminView(false);
                 setIsProfessionalView(false);
                 setIsCompletingProfile(false);
-                setLoading(false);
+                if (mounted) setLoading(false);
+                isFetching = false;
             }
         });
 
-        // Initialize session manually in case INITIAL_SESSION doesn't trigger
+        // Fallback for when "INITIAL_SESSION" gets completely skipped by Supabase JS on load
-        // (sometimes needed depending on supabase-js version and local storage state)
         supabase.auth.getSession().then(({ data: { session }, error }) => {
             if (error) {
                 console.error("UserContext: Falha na sessão inicial", error);
                 if (mounted) setLoading(false);
             } else if (session) {
-                // Handled gracefully: forces profile fetch if session exists but events failed
+                // If there's a session but events haven't fired or were skipped, gently process it
                 handleSession(session);
             } else {
-                // Se não há sessão e onAuthStateChange não disparou INITIAL_SESSION
                 if (mounted) setLoading(false);
             }
         });