v2.3.0

Added

• Simplified Chinese is now available as a UI language.
• Antigravity notifications. Publish and discuss artifacts with Antigravity
  agents, with feedback delivered directly to the running agent session.

Changed

• Access control updates.

  • Localhost only: Login is off by default (requireLogin=true enables
    it). Unauthenticated servers reject forwarded requests, issue no
    credentials, and show a one-time browser notice (suppress with
    disableLoginNotice=true).
  • External access: Any external bind, host, public URL, or proxy requires
    login. Exposed servers reject requireLogin=false and refuse to start until
    it is removed.

• An animated working indicator. The navbar robot animates while agents are
  working on threads and respects reduced-motion preferences.

• Notification cleanup after agents exit. r3 removes saved notification
  credentials when it can confirm an agent has exited. Run
  r3 listen <artifact-id> after resuming the agent to receive feedback again.

Fixed

• Readable Mermaid diagrams in Markdown. Diagrams retain their colors,
  labels, and visible edges in light and dark previews, with support for Unicode
  names, labeled bidirectional arrows, and multiline labels. Republish existing
  Markdown to apply the rendering fixes.