Stage-then-commit batch flow for AddEventDialog. One project per
batch, typed date entry with smart parse, full keyboard operation.
Extracts DateField + parseDate as shared primitives, migrates
EditEventDialog and TaskFormDialog.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Approved design for linking a local folder to a project: lightweight
manifest with per-file LLM summaries, WS-streamed indexing pipeline,
pre-injected manifest for Home/Brief/Task-Brief agents, tier-gated
token+file-count quota recorded backend-side.
