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/ShopCustomerResource/RelationManagers/OrdersRelationManager.php

@@ -11,15 +11,20 @@ class OrdersRelationManager extends RelationManager
 {
     protected static string $relationship = 'orders';
 
-    protected static ?string $title = 'Comenzi';
+    protected static ?string $title = null;
+
+    public static function getTitle(\Illuminate\Database\Eloquent\Model $ownerRecord, string $pageClass): string
+    {
+        return __('Comenzi');
+    }
 
     public function table(Table $table): Table
     {
         return $table
             ->recordTitleAttribute('number')
             ->columns([
-                Tables\Columns\TextColumn::make('number')->label('Nr.'),
-                Tables\Columns\TextColumn::make('created_at')->label('Data')->dateTime('d.m.Y H:i'),
+                Tables\Columns\TextColumn::make('number')->label(__('Nr.')),
+                Tables\Columns\TextColumn::make('created_at')->label(__('Data'))->dateTime('d.m.Y H:i'),
                 Tables\Columns\TextColumn::make('status')
                     ->formatStateUsing(fn ($s) => OnlineOrder::STATUSES[$s] ?? $s)
                     ->badge()
@@ -33,6 +38,6 @@ class OrdersRelationManager extends RelationManager
                 Tables\Columns\TextColumn::make('total')->money('MDL')->alignRight(),
             ])
             ->defaultSort('created_at', 'desc')
-            ->emptyStateHeading('Nicio comandă încă');
+            ->emptyStateHeading(__('Nicio comandă încă'));
     }
 }