main
feat(artifacts): Save-As dialog + in-progress wiring + failed-card retry (#3162) (#4127)
feat(agent): track session token costs (#4136)
fix(auth): resolve login redirect loop on first login (#3109)
fix(ui): refetch snapshot on turn boundary so progress UI re-syncs (#924) (#981)
feat(auth): add local offline login (#2208)
feat(theme): runtime theming — semantic tokens, Theme Studio, presets (#4130)