v0.3.1 — Esc exits annotation, crops attach as image previews

[0.3.1] — 2026-11-06

Fixed

• Esc did not leave annotate mode in the CDP carrier: the handler was on the
  panel root, which never has focus while the pointer is over the screencast.
  It now listens on window in capture, and the native overlay forwards Esc
  from inside the proxied iframe (including after in-page navigation).
• Annotation crops were saved as a path but not shown in the chat; the composer
  now receives them as image drafts (createDrafts + addAttachments) while
  the text keeps the path for the agent.

Documentation

• Rebuilt the README around a banner, status badges, a table of contents,
  quick start, screenshots, a carrier table, FAQ and a dedicated privacy
  section; added a full Catalan translation in README.ca.md.
• Added CODE_OF_CONDUCT.md and linked it from the README and CONTRIBUTING.
• The repository banner is generated from test/preview/banner.html by
  npm run mockups.