feat: replace Excel export with PDF export for transmittals

- Add new TransmittalPDFExportJob to generate PDFs using dompdf
- Remove old Excel export implementation (TransmittalsExport)
- Update ExportCompleteJob to use new PDF job instead of Excel
- Add TestQueueJob for queue testing with new route
- Update notification label from "Download File" to "Download PDF File"
- Fix auth() helper usage by importing Auth facade consistently

app/Providers/Filament/AdminPanelProvider.php

@@ -18,6 +18,7 @@ use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken;
 use Illuminate\Routing\Middleware\SubstituteBindings;
 use Illuminate\Session\Middleware\AuthenticateSession;
 use Illuminate\Session\Middleware\StartSession;
+use Illuminate\Support\Facades\Auth;
 use Illuminate\View\Middleware\ShareErrorsFromSession;
 
 class AdminPanelProvider extends PanelProvider
@@ -45,7 +46,7 @@ class AdminPanelProvider extends PanelProvider
                     ->url(fn (): string => url(config('horizon.path')))
                     ->icon('heroicon-o-queue-list')
                     ->group('System')
-                    ->visible(fn (): bool => auth()->user()?->hasRole('super_admin') ?? false),
+                    ->visible(fn (): bool => Auth::user()?->hasRole('super_admin') ?? false),
             ])
             ->databaseNotifications()
             ->discoverWidgets(in: app_path('Filament/Widgets'), for: 'App\\Filament\\Widgets')