Fix redirect in AdminBlog

src/pages/AdminBlog.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { supabase } from '@/integrations/supabase/client';
@@ -75,8 +75,14 @@ export default function AdminBlog() {
   }
 
   // Redirect if not admin or superuser
-  if (!isAdmin()) {
-    navigate('/');
+  useEffect(() => {
+    if (!loading && !isAdmin()) {
+      navigate('/');
+    }
+  }, [loading, isAdmin, navigate]);
+
+  // Don't render if not admin
+  if (!loading && !isAdmin()) {
     return null;
   }