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

composables/useAuth.ts

@@ -66,9 +66,9 @@ export const useAuth = () => {
         
         while (!sessionSuccess && attempts < maxAttempts) {
           attempts++;
-          console.log(`🔄 Forced session check attempt ${attempts}/${maxAttempts}`);
+          console.log(`🔄 Session check attempt ${attempts}/${maxAttempts}`);
           
-          sessionSuccess = await checkAuth(true); // Force bypass throttling for login
+          sessionSuccess = await checkAuth();
           
           if (!sessionSuccess && attempts < maxAttempts) {
             console.log('⏳ Session not ready, waiting 500ms...');
@@ -150,24 +150,10 @@ export const useAuth = () => {
     }
   };
 
-  // Session check throttling to prevent iOS Safari loops
-  const lastSessionCheck = ref(0);
-  const SESSION_CHECK_THROTTLE = 5000; // 5 seconds minimum between checks
-  
-  // Check authentication status with smart throttling
-  const checkAuth = async (force = false) => {
-    const now = Date.now();
-    
-    // Allow forced checks to bypass throttling for critical operations
-    if (!force && now - lastSessionCheck.value < SESSION_CHECK_THROTTLE) {
-      console.log('🚫 Session check throttled, using cached result');
-      return !!user.value;
-    }
-    
+  // Check authentication status - simple and reliable
+  const checkAuth = async () => {
     try {
-      const logType = force ? 'forced' : 'throttled';
-      console.log(`🔄 Performing ${logType} session check...`);
-      lastSessionCheck.value = now;
+      console.log('🔄 Performing session check...');
       
       const response = await $fetch<{
         authenticated: boolean;