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/middleware.ts

@@ -5,7 +5,7 @@ import { NextResponse } from "next/server";
 const authRoutes = ["/login", "/signup", "/forgot-password", "/reset-password", "/verify-email"];
 
 // Public routes - accessible to everyone (logged in or not)
-const publicRoutes = ["/", "/contact", "/about", "/faq", "/logout", "/user/dashboard", "/user/profiles", "/user/profile"];
+const publicRoutes = ["/", "/contact", "/about", "/faq", "/education", "/logout", "/user/dashboard", "/user/profiles", "/user/profile"];
 
 export default auth((req) => {
   const { nextUrl } = req;