Changes:
- feat(agent): live-switch Claude CLI auto-compact window without respawn
- feat(agent): add commit-trailer directive to spawned-session system prompt
- feat(site): expand landing page and tighten READMEs
- feat: add markdown preview, file caching, and reconnection UI
- fix(pwa): forward selectedContextWindow on claude:start so auto-compact respects user's pick
- fix(agent): broadcast user-message card-event for multi-tab visibility
- fix(bus): re-subscribe on key-exchange-ack via onReestablished signal
- fix(pwa): suppress xterm auto-replies during snapshot replay
- perf(pwa): memoize CardRenderer to keep input responsive
- refactor: remove streamId from CardEvent wire format and provider machinery
- docs(site): use the recommended native installer for Claude Code
- chore: remove accidentally committed scratch dump and stale npm lockfile