Apply PR review feedback: type safety, tsconfig coverage, dep classification, async cleanup, and missing surface stubs

api/src/index.ts

@@ -0,0 +1,4 @@
+import { app } from "./server";
+
+const port = Number(process.env.PORT) || 4000;
+app.listen(port, () => console.log(`API listening on :${port}`));

api/src/server.ts

@@ -0,0 +1,14 @@
+import express from "express";
+
+const app = express();
+
+app.get("/contracts", (_req, res) => {
+  // minimal placeholder that returns an empty array
+  res.json([]);
+});
+
+app.get("/health", (_req, res) => {
+  res.json({ status: "ok" });
+});
+
+export { app };

app/src/main.tsx

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+import React from "react";
+import { createRoot } from "react-dom/client";
+import { AppRouter } from "./router";
+
+createRoot(document.getElementById("root")!).render(
+  <React.StrictMode>
+    <AppRouter />
+  </React.StrictMode>
+);

app/src/router.tsx

@@ -0,0 +1,5 @@
+import React from "react";
+
+export function AppRouter() {
+  return <div>CyberAi</div>;
+}