fix(web): strip trailing slash from wildcard/custom-domain rewrite target

Root-path requests to a subdomain or custom domain rewrote to
/menu/<slug>/ (trailing slash), which the [slug] dynamic route can't
match — the app fell through to notFound() even for verified,
published restaurants. Custom domains (e.g. ad.ayris.tech) always hit
this since their only real traffic is the root path.

apps/web/src/middleware.ts

@@ -17,8 +17,13 @@ export function middleware(req: NextRequest) {
     ? hostname.replace(`.${ROOT_DOMAIN}`, "")
     : hostname; // custom domain — resolved to a slug via domains table at render time
 
+  // On the root path, req.nextUrl.pathname is "/" — appending it as-is would
+  // rewrite to "/menu/<slug>/" (trailing slash), which the [slug] dynamic
+  // route does not match. Only append the original path when it's non-root.
+  const originalPath = req.nextUrl.pathname === "/" ? "" : req.nextUrl.pathname;
+
   const url = req.nextUrl.clone();
-  url.pathname = `/menu/${subdomain}${req.nextUrl.pathname}`;
+  url.pathname = `/menu/${subdomain}${originalPath}`;
   return NextResponse.rewrite(url);
 }