T1/Phase 1: scaffold Vite SPA + Hono API + Bun worker

- apps/web: Vite + React 19 + TanStack Router/Query + shadcn/ui
   - apps/api: Hono + Bun on :3001 with /api/health, /api/auth/*, /mcp stubs
   - apps/worker: Bun worker stub, DB connection, graceful SIGTERM
   - apps/web-legacy/: old Next.js code moved aside (preserved for T2-T8 reference)
   - Dockerfiles: api (Bun), worker (Bun), spa (multi-stage Caddy)
   - Caddyfile: serves dist + reverse-proxies /api/* + /mcp to api
   - docker-compose.yml: 4-service target (api, spa, db, worker)
   - packages/db/src/client.ts: shared Drizzle client for api + worker
   - db/client.ts: root-level alias for convenience

   Parent: t_e1cbd87d -> t_24c9c3fd (T0)

apps/worker/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "@project-e/worker",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "bun run --watch src/index.ts",
+    "start": "bun run src/index.ts",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@project-e/db": "^0.1.0",
+    "drizzle-orm": "^0.45.2",
+    "postgres": "^3.4.9"
+  },
+  "devDependencies": {
+    "@types/node": "^22.19.0",
+    "typescript": "^5.9.3"
+  }
+}

apps/worker/src/index.ts

@@ -0,0 +1,35 @@
+import { db, sql } from "@project-e/db/client";
+
+let running = true;
+
+process.on("SIGTERM", async () => {
+  console.log("worker: SIGTERM received, shutting down gracefully...");
+  running = false;
+  await sql.end();
+  process.exit(0);
+});
+
+process.on("SIGINT", async () => {
+  console.log("worker: SIGINT received, shutting down gracefully...");
+  running = false;
+  await sql.end();
+  process.exit(0);
+});
+
+async function main() {
+  try {
+    // Test DB connection
+    await sql`SELECT 1`;
+    console.log("worker ready");
+  } catch (err) {
+    console.error("worker: failed to connect to database:", err);
+    process.exit(1);
+  }
+
+  // Stub loop: sleep forever, handle signals
+  while (running) {
+    await new Promise((resolve) => setTimeout(resolve, 10000));
+  }
+}
+
+main();

apps/worker/tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "isolatedModules": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": ["src"]
+}