feat(pdf): preview in Filament modal (iframe) instead of new tab

All "Vizualizare PDF" actions now open a wide (7xl) Filament modal
containing an iframe pointing at the inline PDF endpoint, with a
top-right "Descarcă" and "Deschide în tab nou" fallback.

- WorkOrder edit action + WO table row action
- InjectorProtocol edit action + protocols table row action
- Dashboard Docs tab preview button (Alpine.js overlay since it's
  a plain Blade view, not a Filament action)

The underlying /pdf routes stay unchanged (Content-Disposition: inline,
?download=1 for attachment) — the iframe just loads the same URL.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Filament/Tenant/Resources/WorkOrderResource/Pages/EditWorkOrder.php

@@ -87,8 +87,14 @@ class EditWorkOrder extends EditRecord
                 ->label(__('Vizualizare PDF'))
                 ->icon('heroicon-m-document-magnifying-glass')
                 ->color('gray')
-                ->url(fn () => url('/app/work-orders/' . $this->record->id . '/pdf'))
-                ->openUrlInNewTab(),
+                ->modalHeading(fn () => __('Factură') . ' — WO #' . $this->record->number)
+                ->modalSubmitAction(false)
+                ->modalCancelActionLabel(__('Închide'))
+                ->modalWidth('7xl')
+                ->modalContent(fn () => view('filament.tenant.pdf-preview', [
+                    'pdfUrl' => url('/app/work-orders/' . $this->record->id . '/pdf'),
+                    'downloadUrl' => url('/app/work-orders/' . $this->record->id . '/pdf?download=1'),
+                ])),
             Actions\DeleteAction::make(),
         ];
     }