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/Filament/Resources/TicketResource/Pages/EditTicket.php

@@ -2,6 +2,7 @@
 
 namespace App\Filament\Resources\TicketResource\Pages;
 
+use Filament\Actions\DeleteAction;
 use App\Filament\Resources\TicketResource;
 use Filament\Actions;
 use Filament\Resources\Pages\EditRecord;
@@ -13,7 +14,7 @@ class EditTicket extends EditRecord
     protected function getHeaderActions(): array
     {
         return [
-            Actions\DeleteAction::make(),
+            DeleteAction::make(),
         ];
     }
 }

app/Filament/Resources/TicketResource/Pages/ListTickets.php

@@ -2,6 +2,7 @@
 
 namespace App\Filament\Resources\TicketResource\Pages;
 
+use Filament\Actions\CreateAction;
 use App\Filament\Resources\TicketResource;
 use Filament\Actions;
 use Filament\Resources\Pages\ListRecords;
@@ -13,7 +14,7 @@ class ListTickets extends ListRecords
     protected function getHeaderActions(): array
     {
         return [
-            Actions\CreateAction::make(),
+            CreateAction::make(),
         ];
     }
 }