Simplify auth system by removing throttling and mobile workarounds

- Remove session check throttling mechanism from useAuth composable
- Eliminate forced auth check parameters throughout codebase
- Replace window.location redirects with standard navigateTo()
- Remove mobile-specific authentication handling and diagnostics
- Move auth check to onMounted hook in login page
- Clean up console logging for auth operations

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 - use forced check for middleware
+  // Ensure auth is checked if user isn't loaded
   if (!user.value) {
-    await checkAuth(true); // Force check to bypass throttling in middleware
+    await checkAuth();
   }
 
   if (!isAuthenticated.value) {