- deploy-pages.yml: add copilot/** branch pattern so Copilot Agent PRs
auto-deploy to GitHub Pages while under review (no hardcoded branch name)
- docs/index.html: v3.1 version comment triggers the deploy on this push
This makes the live site immediately show: auto-detect API key, Gemini
provider, sessionStorage key (no cross-session stale key), and all other
fixes from this PR branch.
Co-authored-by: qinfendebingshuo <207279273+qinfendebingshuo@users.noreply.github.com>