Temporary message transfer app: send and pick up messages with one-time retrieval. i18n (zh/en), share links.

• i18n — Chinese / English, preference stored in browser
• Temporary messages — Default 24h TTL, configurable
• One-time pickup — Message deleted after retrieval; copy content easily
• Share — Copy receive URL + pickup code for sharing

npm install
npm run dev

Open http://localhost:3000.