fix: consulting slots display and auth reload redirect

- Group consulting slots by date in admin order detail modal
- Show time range from first slot start to last slot end
- Display session count badge for multi-slot orders
- Fix page reload redirecting to main page by ensuring loading state
  is properly synchronized with Supabase session initialization
- Add mounted flag to prevent state updates after unmount

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/hooks/useAuth.tsx

@@ -21,31 +21,46 @@ export function AuthProvider({ children }: { children: ReactNode }) {
   const [isAdmin, setIsAdmin] = useState(false);
 
   useEffect(() => {
-    const { data: { subscription } } = supabase.auth.onAuthStateChange(
-      (event, session) => {
-        setSession(session);
-        setUser(session?.user ?? null);
-        
-        if (session?.user) {
-          setTimeout(() => {
-            checkAdminRole(session.user.id);
-          }, 0);
-        } else {
-          setIsAdmin(false);
-        }
-      }
-    );
+    let mounted = true;
 
+    // First, get the initial session
     supabase.auth.getSession().then(({ data: { session } }) => {
+      if (!mounted) return;
+
       setSession(session);
       setUser(session?.user ?? null);
+
       if (session?.user) {
         checkAdminRole(session.user.id);
       }
+
+      // Only set loading to false after initial session is loaded
       setLoading(false);
     });
 
-    return () => subscription.unsubscribe();
+    // Then listen for auth state changes
+    const { data: { subscription } } = supabase.auth.onAuthStateChange(
+      (event, session) => {
+        if (!mounted) return;
+
+        setSession(session);
+        setUser(session?.user ?? null);
+
+        if (session?.user) {
+          checkAdminRole(session.user.id);
+        } else {
+          setIsAdmin(false);
+        }
+
+        // Ensure loading is false after auth state changes
+        setLoading(false);
+      }
+    );
+
+    return () => {
+      mounted = false;
+      subscription.unsubscribe();
+    };
   }, []);
 
   const checkAdminRole = async (userId: string) => {