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/Mailbox/Inbox.php

@@ -2,6 +2,7 @@
 
 namespace App\Livewire\Dashboard\Mailbox;
 
+use Exception;
 use App\ColorPicker;
 use App\Models\Log;
 use App\Models\Premium;
@@ -77,7 +78,7 @@ class Inbox extends Component
                 }
                 $this->email_limit = $mailboxLimit;
 
-            } catch (\Exception $e) {
+            } catch (Exception $e) {
                 \Log::error($e->getMessage());
             }
         }
@@ -120,7 +121,7 @@ class Inbox extends Component
                     }
                 }
             }
-        } catch (\Exception $exception) {
+        } catch (Exception $exception) {
             \Log::error($exception->getMessage());
         }
 
@@ -282,7 +283,7 @@ class Inbox extends Component
                     }
                 }
             }
-        } catch (\Exception $exception) {
+        } catch (Exception $exception) {
             \Log::error($exception->getMessage());
         }
     }
@@ -355,7 +356,7 @@ class Inbox extends Component
 
             $this->emailsHistory = array_reverse(PremiumEmail::parseEmail(\auth()->user()->id)['data']) ?? [];
 
-        } catch (\Exception $e) {
+        } catch (Exception $e) {
             if (Auth::check() && Auth::user()->level == 9) {
                 $this->error = $e->getMessage();
             } else {
@@ -383,7 +384,7 @@ class Inbox extends Component
             }
 
         } catch (
-        \Exception $exception
+        Exception $exception
         ) {
             \Illuminate\Support\Facades\Log::error($exception->getMessage());
         }