feat(hub): wire Restaurant tile + bump dev port to 5187

The Restaurant chakra tile was stubbed as 'coming soon' since the
bundle didn't exist. Now that aiolabs/webapp ships a restaurant
bundle, switch it to envKey-driven so deploys can set
VITE_HUB_RESTAURANT_URL the same way they set the other 7
standalones.

Also bumps the vite dev port from 5186 → 5187 — tasks was already on
5186 and `npm run dev:all` raced.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

vite.restaurant.config.ts

@@ -46,7 +46,7 @@ export default defineConfig(({ mode }) => ({
   // Per-app dep cache so concurrent dev servers don't race on .vite/deps
   cacheDir: 'node_modules/.vite-restaurant',
   server: {
-    port: 5186,
+    port: 5187,
     strictPort: true,
   },
   plugins: [