fix: Urdu menu item descriptions now fully translated

- Added complete Urdu translations for all menuDescriptions (and signatureMenuItems) in lib/translations.ts so descriptions localize properly when language=ur.
- Updated sidebar 'All Dishes' label to use translated t.menu.allDishes.
- Descriptions now correctly appear in Urdu (while dish names remain unchanged) on /menu page and homepage signature section.
- Builds cleanly.

app/menu/page.tsx

@@ -27,7 +27,7 @@ export default function MenuPage() {
 
   // Sidebar categories
   const sidebarCategories = [
-    { id: "All", name: "All Dishes" },
+    { id: "All", name: t.menu.allDishes || "All Dishes" },
     ...menuCategories.map((cat) => ({ id: cat.id, name: cat.name })),
   ];