feat: replace 'Royal' with 'Shahi' everywhere for brand consistency (navbar, translations, pages, layout, css, etc.)

app/layout.tsx

@@ -18,7 +18,7 @@
  * - We deliberately render <CartDrawer /> and <Toaster /> at the root level instead of
  *   inside individual pages. This guarantees only ONE instance exists and prevents
  *   duplicate drawers/toasts when navigating.
- * - The cream/gold royal theme tokens live in globals.css and are referenced via
+ * - The cream/gold Shahi theme tokens live in globals.css and are referenced via
  *   Tailwind arbitrary values (e.g. bg-[#F8F5F0]).
  * 
  * FUTURE DEVELOPERS:
@@ -65,7 +65,7 @@ const geistMono = Geist_Mono({
  */
 export const metadata: Metadata = {
   title: "Shahi Kitchen | Authentic Indian & Pakistani Restaurant in Gothenburg",
-  description: "Experience royal flavors at Shahi Kitchen in Askim, Gothenburg. Authentic Indian & Pakistani cuisine, famous lunch buffet, and traditional sweets since 2016.",
+  description: "Experience Shahi flavors at Shahi Kitchen in Askim, Gothenburg. Authentic Indian & Pakistani cuisine, famous lunch buffet, and traditional sweets since 2016.",
   icons: {
     icon: "/favicon.ico",
   },
@@ -81,7 +81,7 @@ export const metadata: Metadata = {
  * 
  * IMPORTANT:
  * - Never wrap the entire app in another CartProvider — it will break the singleton.
- * - The body uses the royal cream background (#F8F5F0) as the base canvas.
+ * - The body uses the Shahi cream background (#F8F5F0) as the base canvas.
  * - `antialiased` + font variables are applied once at the root for consistency.
  */
 export default function RootLayout({