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/tailwind.config.ts

@@ -0,0 +1,29 @@
+import type { Config } from "tailwindcss";
+
+const config: Config = {
+  content: ["./src/**/*.{js,ts,jsx,tsx,mdx}"],
+  theme: {
+    extend: {
+      colors: {
+        brand: {
+          50:  "#f0faf6",
+          100: "#d8f3e8",
+          200: "#b4e8d3",
+          300: "#82d4b7",
+          400: "#4cb896",
+          500: "#289b78",
+          600: "#1a7d60",
+          700: "#0F6E56",
+          800: "#0e5a46",
+          900: "#0d4a3a",
+        },
+      },
+      fontFamily: {
+        sans: ["var(--font-sans)", "system-ui", "sans-serif"],
+      },
+    },
+  },
+  plugins: [],
+};
+
+export default config;