Fix PDF locale and missing translations for ru/en

- Set app locale from user preference in PDF route before rendering
- Wrap hardcoded strings (TOTAL, Subtotal, Achitat etc.) with __()
- Translate status values via __() in blade
- Add ru/en translations: statuses, totals, payment lines

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

routes/web.php

@@ -85,6 +85,8 @@ Route::get('/app/appointments/pdf', function (Request $request) {
 // so user can print/save); forced download with ?download=1.
 Route::get('/app/work-orders/{workOrder}/pdf', function (Request $request, int $workOrder) {
     abort_unless(auth('web')->check(), 403);
+    $locale = auth('web')->user()?->locale ?? config('app.locale');
+    app()->setLocale($locale);
     $wo = \App\Models\Tenant\WorkOrder::findOrFail($workOrder);
     $svc = app(\App\Services\WorkOrderPdfService::class);
     $pdf = $svc->generate($wo);