replace Start prerender with Vite SPA

wrangler.jsonc

@@ -2,13 +2,10 @@
   "$schema": "./node_modules/wrangler/config-schema.json",
   "name": "gig-admin",
   "compatibility_date": "2026-07-15",
-  // Assets-only Worker: gig-admin is a client-rendered SPA (see vite.config.ts
-  // `spa: { enabled: true }`), so there is no server to run — Cloudflare just
-  // serves the static build and falls back to the SPA shell for client routes.
-  // `pnpm cf:build` copies the TanStack Start shell to index.html, which
-  // `single-page-application` handling serves for any non-asset request.
+  // Assets-only Worker: gig-admin is a client-rendered SPA, so Cloudflare
+  // serves the Vite build and falls back to index.html for client routes.
   "assets": {
-    "directory": "dist/client",
+    "directory": "dist",
     "not_found_handling": "single-page-application"
   },
   "observability": {