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.

.gitignore

@@ -0,0 +1,34 @@
+# Dependencies
+node_modules/
+.pnpm-store/
+
+# Build output
+dist/
+build/
+*.tsbuildinfo
+
+# Local env
+.env
+.env.*
+!.env.example
+
+# SQLite database
+server/data/
+*.db
+*.sqlite
+*.sqlite3
+
+# Logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+
+# Editor / OS
+.vscode/*
+!.vscode/extensions.json
+.idea/
+.DS_Store
+*.swp
+
+# Local tool state (Kilo)
+.kilo/