i18n(wo relations): translated snapshot names + explicit empty states

- WorksRelationManager Name column: getStateUsing(labor?->label()) so
  the row shows the labor's localized name (not the raw snapshot);
  fallback to stored snapshot when labor is missing.
- 4 explicit empty states with helper description + icon on Works,
  Parts, SubcontractJobs, Payments — replaces Filament's auto-generated
  'Не найдено X / Создать X для старта.'
- 4 CreateAction titles / modal headings for all four relation managers.
- Notification 'Piesa returnată în stoc' / 'Nimic de restituit' wrapped.
- +11 translation keys.

All 306 tests pass.

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

app/Filament/Tenant/Resources/WorkOrderResource/RelationManagers/PaymentsRelationManager.php

@@ -49,17 +49,23 @@ class PaymentsRelationManager extends RelationManager
                 Tables\Columns\TextColumn::make('reference')->placeholder('—'),
             ])
             ->headerActions([
-                Actions\CreateAction::make()->mutateFormDataUsing(function (array $data, RelationManager $livewire): array {
-                    $wo = $livewire->getOwnerRecord();
-                    $data['client_id'] = $wo->client_id;
-                    $data['user_id'] = auth()->id();
-                    return $data;
-                }),
+                Actions\CreateAction::make()
+                    ->label(__('Adaugă plată'))
+                    ->modalHeading(__('Adaugă plată la fișă'))
+                    ->mutateFormDataUsing(function (array $data, RelationManager $livewire): array {
+                        $wo = $livewire->getOwnerRecord();
+                        $data['client_id'] = $wo->client_id;
+                        $data['user_id'] = auth()->id();
+                        return $data;
+                    }),
             ])
             ->actions([
                 Actions\EditAction::make(),
                 Actions\DeleteAction::make(),
             ])
+            ->emptyStateHeading(__('Nicio plată'))
+            ->emptyStateDescription(__('Adaugă plățile parțiale sau totale primite pentru această fișă. Statusul plății se actualizează automat.'))
+            ->emptyStateIcon('heroicon-o-banknotes')
             ->defaultSort('paid_at', 'desc');
     }
 }