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/Livewire/Dashboard/Pricing.php

@@ -2,6 +2,8 @@
 
 namespace App\Livewire\Dashboard;
 
+use Exception;
+use Log;
 use App\Models\ActivationKey;
 use App\Models\Plan;
 use Livewire\Component;
@@ -80,8 +82,8 @@ class Pricing extends Component
             }
             $user->subscription('default')->cancelAt($ends_at);
             return true;
-        } catch (\Exception $e) {
-            \Log::error($e->getMessage());
+        } catch (Exception $e) {
+            Log::error($e->getMessage());
             return false;
         }
     }