Initial commit: installable PWA hello world

React + TypeScript + Tailwind v4 + shadcn/ui frontend (client), Express +
better-sqlite3 backend (server) in a pnpm workspace. Includes vite-plugin-pwa
manifest, service worker, and iOS install meta tags. GET /api/hello increments a
visit counter in SQLite; backend serves the built client in production.

server/src/db.ts

@@ -0,0 +1,35 @@
+import Database from "better-sqlite3"
+import fs from "node:fs"
+import path from "node:path"
+import { fileURLToPath } from "node:url"
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
+
+const dataDir = path.resolve(__dirname, "../data")
+fs.mkdirSync(dataDir, { recursive: true })
+
+const dbPath = path.join(dataDir, "app.db")
+
+export const db = new Database(dbPath)
+db.pragma("journal_mode = WAL")
+
+db.exec(`
+  CREATE TABLE IF NOT EXISTS visits (
+    id INTEGER PRIMARY KEY CHECK (id = 1),
+    count INTEGER NOT NULL DEFAULT 0
+  )
+`)
+
+const existing = db
+  .prepare("SELECT count FROM visits WHERE id = 1")
+  .get() as { count: number } | undefined
+
+if (!existing) {
+  db.prepare("INSERT INTO visits (id, count) VALUES (1, 0)").run()
+}
+
+export function incrementAndGetVisits(): number {
+  db.prepare("UPDATE visits SET count = count + 1 WHERE id = 1").run()
+  const row = db.prepare("SELECT count FROM visits WHERE id = 1").get() as { count: number }
+  return row.count
+}

server/src/index.ts

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+import express from "express"
+import fs from "node:fs"
+import path from "node:path"
+import { fileURLToPath } from "node:url"
+
+import { helloRouter } from "./routes/hello.js"
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
+
+const app = express()
+const PORT = process.env.PORT ? Number(process.env.PORT) : 3001
+
+app.use(express.json())
+
+app.get("/api/health", (_req, res) => {
+  res.json({ ok: true })
+})
+
+app.use("/api", helloRouter)
+
+// In production, serve the built client (client/dist) and fall back to index.html.
+const clientDist = path.resolve(__dirname, "../../client/dist")
+if (fs.existsSync(clientDist)) {
+  app.use(express.static(clientDist))
+  app.get("*", (_req, res) => {
+    res.sendFile(path.join(clientDist, "index.html"))
+  })
+}
+
+app.listen(PORT, () => {
+  console.log(`Pocket Pascal server listening on http://localhost:${PORT}`)
+})

server/src/routes/hello.ts

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+import { Router } from "express"
+
+import { incrementAndGetVisits } from "../db.js"
+
+export const helloRouter = Router()
+
+helloRouter.get("/hello", (_req, res) => {
+  const visits = incrementAndGetVisits()
+  res.json({
+    message: "Hello, World!",
+    visits,
+    ts: new Date().toISOString(),
+  })
+})