CalDAV account connect (Settings → Calendars) with RFC 6764 discovery,
per-calendar vaulted credentials, and full two-way sync verified live
against NextCloud:
- caldav.py: discovery, calendar-query REPORT (pull), PUT/DELETE with
quoted ETags (If-Match/If-None-Match), iCloud partition-redirect
handling, ICS build/parse; clear error codes (auth/private-host/
unreachable) surfaced to the connect UI.
- sync.py: ctag-gated pull + push of local changes; dirty rows protected
from being clobbered; 15-min cron + immediate enqueue on every
create/edit/delete so changes reach the server in ~1s.
- Dirty tracking via a BEFORE INSERT/UPDATE trigger (migration 0007),
suppressed during sync with a txn-local GUC; deletes tombstone then
DELETE server-side. Writability now driven by server privileges.
- migration 0006: event uniqueness NULLS NOT DISTINCT — fixes duplicate
events on every full re-pull (NULL recurrence_id never matched ON CONFLICT).
- 5 CalDAV parsing unit tests.
Calendar UI (page.js): all-day events now render in Day/3-days/Week views
(were month-only). They share the timed-event column layout so overlapping
events sit side-by-side, fill the day column vertically with a sticky label,
and are matched by start day (fixes UTC-midnight events spilling into the
next local day).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
