Add multilingual support to labor categories (RO/RU/EN)

- Migration: adds name_ro, name_ru, name_en columns; copies name→name_ro;
  seeds RU and EN translations for all 11 default categories
- LaborCategory: label() returns localized name, optionsForSelect() keyed
  by canonical name (stored in labors.category) with localized label
- LaborCategoryResource: 3-column form with RO/RU/EN inputs; table shows
  all three columns side by side
- LaborResource: category select and filter use optionsForSelect()

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

app/Models/Tenant/LaborCategory.php

@@ -9,7 +9,25 @@ class LaborCategory extends Model
 {
     use BelongsToTenant;
 
-    protected $fillable = ['company_id', 'name', 'sort_order'];
+    protected $fillable = ['company_id', 'name', 'name_ro', 'name_ru', 'name_en', 'sort_order'];
 
     protected $casts = ['sort_order' => 'integer'];
+
+    /** Localized display label — falls back through ru→en→name_ro→name. */
+    public function label(?string $locale = null): string
+    {
+        $locale = $locale ?: app()->getLocale();
+        return $this->{"name_{$locale}"}
+            ?: $this->name_ro
+            ?: $this->name
+            ?: '';
+    }
+
+    /** Options array keyed by canonical name (stored in labors.category). */
+    public static function optionsForSelect(): array
+    {
+        return static::orderBy('sort_order')->orderBy('name')->get()
+            ->mapWithKeys(fn ($c) => [$c->name => $c->label()])
+            ->toArray();
+    }
 }