This is a tiny Vite + React (TypeScript) app with a mock Express API so you can test camera/mic capture and chunked uploads locally on macOS with VS Code.

• Node 18+ (macOS): node -v
• VS Code (or any editor)
• Camera + Microphone permissions granted to your browser

cd lectra-capture-demo
npm install
npm run start:all

• API: http://localhost:8787
• Web: http://localhost:5173 (proxy /api → API)

• The mock API stores chunks under your system temp dir and simply reports how many it got on finalize.
• The front-end avoids accessing process at runtime; it uses layered fallbacks for API base resolution.
• To run the tiny resolver tests in the browser console:

  window.__LECTRA_RUN_TESTS__ = true
  location.reload()

• If the preview stays black on Safari, click once in the page to give a user gesture, then Start.
• If you run the API elsewhere, set a meta tag in index.html:

  <meta name="lectra-api-base" content="https://api.your.app">

  Or set window.__LECTRA_API_BASE__ in the console before the app mounts.