docs(quick-260607-l6l): summary, state, handoff update + reminder-options todo

- 260607-l6l SUMMARY (executor + orchestrator review follow-ups)
- STATE.md: quick-task row + session continuity (edit/delete blocker resolved)
- HANDOFF.json: 3 write-path code bugs marked done; remaining = operator rebuild + Gate 2 human/device checkpoints
- new backlog todo: event-creation reminder/VALARM options

.planning/todos/pending/event-creation-reminder-options.md

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+---
+title: Add notification/reminder (VALARM) options to event creation
+date: 2026-06-07
+priority: medium
+phase_hint: Phase 5 (push) or earlier in Phase 03 write-path polish
+---
+
+# Add notification/reminder options to event creation
+
+The event-create/edit form (`apps/pwa` EventForm → `POST /api/events`, `PATCH /:uid/edit`)
+has **no UI for setting a reminder/alarm on an event**. A user creating an event cannot
+choose "remind me 10 min / 1 hour / 1 day before". The written `.ics` therefore contains
+no `VALARM` component, so neither Fastmail's native clients nor any downstream notification
+path can fire an event reminder.
+
+This is distinct from (but feeds) the Active requirement
+"Web Push notifications for event reminders and list changes" (Phase 5): even with web-push
+infrastructure, there is nothing to notify *about* unless events carry reminder data.
+
+## Scope to decide when promoted
+
+- Add a reminder selector to EventForm (none / at time / 10m / 30m / 1h / 1d before; possibly
+  multiple).
+- Serialize chosen offsets as `VALARM` (TRIGGER) blocks in the iCalendar payload written
+  back to Fastmail via the outbox.
+- On read, parse existing `VALARM`s so edits preserve/show the current reminder.
+- Decide division of labour vs Phase 5 web-push: VALARM gives native-client reminders
+  (Fastmail/Apple Calendar) for free; app-delivered web-push reminders are the separate
+  Phase 5 piece that would read these offsets.
+
+## Open question
+
+- iCalendar `VALARM` round-trips through `ical.js`; confirm tsdav PUT preserves it and that
+  Fastmail honours `DISPLAY`/`AUDIO` alarms set by a third-party CalDAV client.