Fix auth throttling causing login loops by adding forced session checks

Add optional force parameter to checkAuth() to bypass throttling during
critical authentication flows like login, middleware, and initial auth
verification. This prevents iOS Safari login loops while maintaining
throttling for regular session checks.

middleware/auth.ts

@@ -7,9 +7,9 @@ export default defineNuxtRouteMiddleware(async (to) => {
   // Use the same auth system as the rest of the app
   const { isAuthenticated, checkAuth, user } = useAuth();
   
-  // Ensure auth is checked if user isn't loaded
+  // Ensure auth is checked if user isn't loaded - use forced check for middleware
   if (!user.value) {
-    await checkAuth();
+    await checkAuth(true); // Force check to bypass throttling in middleware
   }
 
   if (!isAuthenticated.value) {