Add RoomAiUpdated, RepoCreated, RepoUpdated, RepoDeleted event types.
Publish RoomAiUpdated after room_ai upsert/delete and repo events
after repo create/update. Always set model_name in AI list response
(fallback to "AI {uuid}" when model lookup fails) so frontend never
displays a raw UUID.
Add ssh_clone_url and https_clone_url to ProjectRepositoryItem,
constructed from config.ssh_domain() and config.git_http_domain().
Update frontend RepoInfo interface and header.tsx to use the
server-provided URLs instead of hardcoded values.