feat(finder): AI-powered cafe finder PWA with Next.js 16

Public cafe discovery app:
- SEO-optimised pages: home, /cafe/[slug], /search, /city/[city]
- AI search bar with natural language queries
- Structured data (JSON-LD) for Google rich results
- City browsing, rating/filter sidebar, similar cafes
- Review listing, full menu preview, working-hours card
- Web App Manifest + offline fallback page (PWA)
- Next.js 16: params/searchParams typed as Promise<{}>
- Fix Lucide icon title→aria-label (type removed upstream)
- "use client" on offline page (onClick handler)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

web/finder/src/i18n/request.ts

@@ -0,0 +1,14 @@
+import { getRequestConfig } from "next-intl/server";
+import { hasLocale } from "next-intl";
+import { routing } from "./routing";
+
+export default getRequestConfig(async ({ requestLocale }) => {
+  const requested = await requestLocale;
+  const locale = hasLocale(routing.locales, requested)
+    ? requested
+    : routing.defaultLocale;
+  return {
+    locale,
+    messages: (await import(`../messages/${locale}.json`)).default,
+  };
+});

web/finder/src/i18n/routing.ts

@@ -0,0 +1,6 @@
+import { defineRouting } from "next-intl/routing";
+
+export const routing = defineRouting({
+  locales: ["fa", "en"],
+  defaultLocale: "fa",
+});