feat: implement version check and update dialog; add browser cache clearing functionality

src/FrontOffice.Main/Pages/_Host.cshtml

@@ -106,6 +106,29 @@
             // اجرای اولیه (حتی اگر کاربر اسکرول نکرده)
             requestAnimationFrame(update);
         }
+        
+        // پاک کردن کش مرورگر (Cache Storage و Service Worker)
+        window.clearBrowserCache = async function() {
+            // پاک کردن Cache Storage (Service Worker cache)
+            if ('caches' in window) {
+                const cacheNames = await caches.keys();
+                await Promise.all(
+                    cacheNames.map(cacheName => caches.delete(cacheName))
+                );
+                console.log('Cache Storage cleared:', cacheNames.length, 'caches deleted');
+            }
+            
+            // پاک کردن Service Worker registration
+            if ('serviceWorker' in navigator) {
+                const registrations = await navigator.serviceWorker.getRegistrations();
+                await Promise.all(
+                    registrations.map(registration => registration.unregister())
+                );
+                console.log('Service Workers unregistered:', registrations.length);
+            }
+            
+            return true;
+        };
     </script>
 </body>
 </html>