Deploy 1: i18n + Notifications + Global Search + Tests

- SetLocale middleware (ro/ru/en, session-first, user-persisted)
- Lang switcher in topbar (Filament render hook USER_MENU_BEFORE)
- POST /locale/{lang} route persists to user.locale + session
- Database notifications enabled on tenant panel (30s polling)
- GlobalSearch (Cmd+K / Ctrl+K) on Client, Vehicle, WorkOrder, Lead, Part
- Tests: TenantIsolation (4), AuthFlow (2), WorkOrderCalc (3), MarkupRule (3)

bootstrap/app.php

@@ -29,6 +29,7 @@ return Application::configure(basePath: dirname(__DIR__))
         $middleware->web(append: [
             \App\Http\Middleware\ResolveTenant::class,
             \App\Http\Middleware\CheckTenantStatus::class,
+            \App\Http\Middleware\SetLocale::class,
         ]);
     })
     ->withExceptions(function (Exceptions $exceptions): void {