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

composer.json

@@ -9,7 +9,7 @@
         "php": "^8.2",
         "ext-imap": "*",
         "ddeboer/imap": "^1.14",
-        "filament/filament": "3.3",
+        "filament/filament": "~4.0",
         "laravel/cashier": "^15.6",
         "laravel/framework": "^12.0",
         "laravel/sanctum": "^4.0",
@@ -21,6 +21,7 @@
     "require-dev": {
         "barryvdh/laravel-debugbar": "^3.15",
         "fakerphp/faker": "^1.23",
+        "filament/upgrade": "~4.0",
         "laravel/boost": "^1.7",
         "laravel/pail": "^1.2.2",
         "laravel/pint": "^1.13",