fix: robust logout session clearing with cookie cleanup and isLoggingOut guard

- Clear next-auth session cookies directly as backup in logout page
- Add isLoggingOut localStorage flag to prevent TokenSync/PresenceProvider from restoring tokens
- Clear isLoggingOut flag on login page load as safety net
- Add createdAt to AgentSubscription interface (fixes build error)
- Add /education to public routes in middleware

src/components/message/MessageInput.tsx

@@ -9,6 +9,7 @@ import { Grid } from '@giphy/react-components';
 
 const gf = new GiphyFetch(process.env.NEXT_PUBLIC_GIPHY_API_KEY || '');
 
+
 interface AttachedFile {
   file: File;
   preview?: string; // Object URL for image preview