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.

composables/useAuth.ts

@@ -66,9 +66,9 @@ export const useAuth = () => {
         
         while (!sessionSuccess && attempts < maxAttempts) {
           attempts++;
-          console.log(`🔄 Session check attempt ${attempts}/${maxAttempts}`);
+          console.log(`🔄 Forced session check attempt ${attempts}/${maxAttempts}`);
           
-          sessionSuccess = await checkAuth();
+          sessionSuccess = await checkAuth(true); // Force bypass throttling for login
           
           if (!sessionSuccess && attempts < maxAttempts) {
             console.log('⏳ Session not ready, waiting 500ms...');
@@ -154,18 +154,19 @@ export const useAuth = () => {
   const lastSessionCheck = ref(0);
   const SESSION_CHECK_THROTTLE = 5000; // 5 seconds minimum between checks
   
-  // Check authentication status with debouncing
-  const checkAuth = async () => {
+  // Check authentication status with smart throttling
+  const checkAuth = async (force = false) => {
     const now = Date.now();
     
-    // Throttle session checks to prevent iOS Safari loops
-    if (now - lastSessionCheck.value < SESSION_CHECK_THROTTLE) {
+    // 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;
     }
     
     try {
-      console.log('🔄 Performing throttled session check...');
+      const logType = force ? 'forced' : 'throttled';
+      console.log(`🔄 Performing ${logType} session check...`);
       lastSessionCheck.value = now;
       
       const response = await $fetch<{