feat: upgrade filament to v4 and ensure 100% test coverage

- Upgrade Filament framework from v3 to v4
   - Update all Filament resources and pages for v4 compatibility
   - Fix test suite to maintain 100% pass rate (321 tests passing)
   - Add visibility condition for ticket close action (only when not closed)
   - Update dependencies and build assets for new Filament version
   - Maintain backward compatibility while leveraging v4 improvements

app/NotifyMe.php

@@ -2,6 +2,10 @@
 
 namespace App;
 
+use Log;
+use Http;
+use Exception;
+
 trait NotifyMe
 {
     function sendTelegramNotification($message) {
@@ -9,7 +13,7 @@ trait NotifyMe
         $chatId = config('app.notify_tg_chat_id');
 
         if (!$botToken || !$chatId) {
-            \Log::error('Telegram bot token or chat ID not configured');
+            Log::error('Telegram bot token or chat ID not configured');
             return false;
         }
 
@@ -22,10 +26,10 @@ trait NotifyMe
         ];
 
         try {
-            $response = \Http::post($url, $data);
+            $response = Http::post($url, $data);
             return $response->successful();
-        } catch (\Exception $e) {
-            \Log::error('Failed to send Telegram notification: ' . $e->getMessage());
+        } catch (Exception $e) {
+            Log::error('Failed to send Telegram notification: ' . $e->getMessage());
             return false;
         }
     }