feat(i18n): wrap 1103 hardcoded UI strings across Filament with __()

- Convert static $modelLabel/$pluralModelLabel/$title to getter methods
- Wrap ->label()/->placeholder()/->helperText()/->description()/->title()/->body() args
- Wrap Section::make()/Fieldset::make()/Notification::make()->title() args
- Fix RelationManagers::getTitle() signature to match parent (Model, string)
- Fix Pages::getTitle() to instance method (BasePage::getTitle is non-static)
- Extend lang/ru.json + lang/en.json with 700+ common terms; identity fallback for the rest
- Remove duplicate getters in 5 resources that had manual getModelLabel already

All 306 tests pass. Missing translations fall back to the RO key so the UI never breaks.

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

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

@@ -33,12 +33,12 @@ class EditWorkOrder extends EditRecord
     {
         return [
             Actions\Action::make('apply_template')
-                ->label('Aplică șablon')
+                ->label(__('Aplică șablon'))
                 ->icon('heroicon-m-clipboard-document-list')
                 ->color('gray')
                 ->schema([
                     \Filament\Forms\Components\Select::make('template_id')
-                        ->label('Șablon serviciu')
+                        ->label(__('Șablon serviciu'))
                         ->options(fn () => \App\Models\Tenant\ServiceTemplate::where('is_active', true)->pluck('name', 'id'))
                         ->searchable()
                         ->required(),
@@ -53,11 +53,11 @@ class EditWorkOrder extends EditRecord
                         ->success()->send();
                 }),
             Actions\Action::make('ai_diagnose')
-                ->label('AI: sugerează diagnostic')
+                ->label(__('AI: sugerează diagnostic'))
                 ->icon('heroicon-m-sparkles')
                 ->color('primary')
                 ->visible(fn () => ! empty($this->record->complaint))
-                ->modalHeading('Diagnostic AI bazat pe plângerea clientului')
+                ->modalHeading(__('Diagnostic AI bazat pe plângerea clientului'))
                 ->modalSubmitAction(false)
                 ->modalCancelActionLabel('Închide')
                 ->modalContent(function () {
@@ -66,7 +66,7 @@ class EditWorkOrder extends EditRecord
                     return view('filament.tenant.ai-reply', ['reply' => $reply, 'meta' => $meta]);
                 }),
             Actions\Action::make('tracking')
-                ->label('Link client (QR)')
+                ->label(__('Link client (QR)'))
                 ->icon('heroicon-m-qr-code')
                 ->color('primary')
                 ->modalHeading(fn () => 'Tracking client — WO #' . $this->record->number)
@@ -76,7 +76,7 @@ class EditWorkOrder extends EditRecord
                     'wo' => $this->record,
                 ])),
             Actions\Action::make('pdf')
-                ->label('Descarcă PDF')
+                ->label(__('Descarcă PDF'))
                 ->icon('heroicon-m-document-arrow-down')
                 ->color('gray')
                 ->action(function () {