Initial commit: ElysiaJS backend + TanStack Start frontend + Traefik compose

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/vite.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from "vite";
+import { tanstackStart } from "@tanstack/react-start/plugin/vite";
+import viteReact from "@vitejs/plugin-react";
+
+// TanStack Start full-stack app. The plugin wires SSR + file-based routing
+// (routes live in src/routes, routeTree.gen.ts is generated automatically).
+export default defineConfig({
+  server: { port: 3000, host: true },
+  plugins: [tanstackStart(), viteReact()],
+});