Fix client/vehicle inline creation and labor catalog visibility

- Migration: make clients.phone nullable (was NOT NULL, broke inline create)
- Vehicle createOptionUsing: use Get callback instead of $livewire->data
  to reliably get client_id in the vehicle inline form
- Remove plate->required() on inline vehicle form (not required in DB)
- Rename 'Norme-ore' → 'Catalog manopere'/'Каталог работ' in navigation
  so users can find the labor catalog easily

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

lang/ru/nav.php

@@ -51,7 +51,7 @@ return [
         'Jurnal activitate' => 'Журнал действий',
         'KPI mecanici' => 'KPI механиков',
         'Lucrări terți' => 'Работы субподрядчиков',
-        'Norme-ore' => 'Нормо-часы',
+        'Norme-ore' => 'Каталог работ',
         'Pipeline' => 'Воронка',
         'Pipeline (tabel)' => 'Воронка (таблица)',
         'Planuri' => 'Тарифы',