Publish to Figma Community

[jnwrnr]

Final step — actually click the button.

Pre-flight:

• All other issues in this milestone closed
• `widget/dist/code.js` rebuilt from clean main
• Tag the release: `git tag v0.6.0 && git push --tags`
• Manifest `id` is `gitjam` — confirm we want this as the permanent Community slug

Publish flow (Figma Desktop client):

1. Plugins → Development → Manage plugins/widgets in development
2. Right-click GitJam → Publish new release
3. Upload icon, cover, thumbnails (Submission assets: icon, cover, screenshots #50)
4. Paste tagline + description + tags (Submission copy: tagline, description, tags, support contact #51)
5. Add support contact (Submission copy: tagline, description, tags, support contact #51)
6. Submit for review

After approval:

• Update README install link to point to Community URL
• Announce internally
• Bump CHANGELOG with publish date

Depends on all other issues in this milestone.