Build Kozmos QR menu site — full implementation

Next.js 16 App Router, TR/EN i18n via [lang] routing and proxy.ts,
Tailwind v4, minimal list menu style, sticky bottom tab bar with
Intersection Observer, PWA manifest, WhatsApp fixed button.

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

app/[lang]/dictionaries.ts

@@ -0,0 +1,16 @@
+import 'server-only'
+
+const dictionaries = {
+  tr: () => import('../../dictionaries/tr.json').then((m) => m.default),
+  en: () => import('../../dictionaries/en.json').then((m) => m.default),
+}
+
+export type Locale = keyof typeof dictionaries
+
+export function hasLocale(locale: string): locale is Locale {
+  return locale in dictionaries
+}
+
+export async function getDictionary(locale: Locale) {
+  return dictionaries[locale]()
+}