- chat.html: Enhanced modal with email+contact fields, split-screen HTML structure,
resizer divider, preview panel with status bar and iframe
- chat.js: Email validation (frontend regex), email prefill on repeat visits,
split-screen enterDevMode(), draggable resizer with touch support,
preview panel status updates, WebSocket connection for build progress
- style.css: Split-screen dev-mode layout, resizer styles, preview panel styles
with status indicators (waiting/building/done/error), modal field styles
- backend: Preview API route, WebSocket server for progress push,
enhanced build route with email validation and broadcast,
enhanced email template with file list and brand signature
Co-authored-by: qinfendebingshuo <207279273+qinfendebingshuo@users.noreply.github.com>
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