docs(phase-11): evolve PROJECT.md — per-event reminders validated

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.planning/PROJECT.md

@@ -37,6 +37,7 @@ Deferred to backlog: self-service provider onboarding (999.5) and provider abstr
 - [x] Live list sync so co-edits appear without manual refresh — **Validated in Phase 4**: scoped SSE fan-out over Pangolin (transport smoke-tested), bounded-backoff reconnect, co-edits land within seconds.
 - [x] Web Push notifications for event reminders and list changes — **Validated in Phase 5 (web-push-notifications)**: VAPID push for reminders, event-change, and coalesced list alerts; on-device UAT 1/2/5 PASS (iOS reminder delivery, iOS push, coalescing). Android event-change on-device confirmation + iOS standalone spinner remain device-only spot-checks at go-live.
 - [x] Faster write-back so edits reach Fastmail in ~1–2s instead of ~15s (CAL-15) — **Validated in Phase 9 (faster-write-back)**: event-driven outbox drain via a zero-dependency in-process EventEmitter (`outboxTrigger.ts`); a committed enqueue publishes a fire-and-forget `signalOutboxDrain()` that funnels through the existing `isDraining`-guarded drain with a `drainRequested` trailing-re-drain, preserving optimistic-202, create-before-delete on moves, exactly-once per uid, and the 15s `setInterval` fallback. 5/5 success criteria verified; trigger-wiring tests assert SC-1/D-05/D-07.
+- [x] Per-event reminders — choose a reminder lead per event (None / 5m / 10m / 15m / 30m / 1h / 2h / 1d / 2d, all-day → day-granularity + 9 AM fire), serialized as a VALARM, with a variable-lead scheduler that honors each event's lead (CAL-13/CAL-14, NOTIF-04/05/06) — **Validated in Phase 11 (per-event-reminders)**: pure VALARM serialization/classification layer (`buildTimedValarm`/`buildAllDayValarm`/`classifyValarms`/`extractValarms`/`computeAlertInstantUtc`); variable-lead scheduler with `uid:dtstartMs` dedup, dropped fixed-15-min/shared-only restriction, all-day 9 AM-local branch; `reminderLeadMinutes` threaded end-to-end with preserve-on-no-change (D-08); allDay-aware reminder picker with edit pre-population. Gap-closure (Plan 11-05) fixed two code-review blockers — custom/other-client VALARMs are now preserved on edit via a surfaced `reminderIsCustom` signal (CAL-14 / Pitfall 1), and the all-day push body no longer reads "Starts in 0 min" — plus post-event-trigger classification, a server-side max bound, and helper-text gating. 5/5 must-haves verified; 347 API + 206 PWA tests green. **Deferred:** live Fastmail VALARM round-trip + on-device push fire (untestable in dev — no provider connected; backlog 999.19).
 - [x] Admin role + role-gated settings surface to rotate member Fastmail app passwords and designate the shared calendar (ADMIN-01/02/03) — **Validated in Phase 10 (admin-role-settings)**: v1.1 DB foundation (`users.is_admin`, `member_credentials.provider_type`+`unique(user_id)`, `calendar_events.reminder_lead_minutes`, `app_config`) via an additive generate+migrate migration; DB-backed `requireAdmin` gating all `/api/admin/*` (client `isAdmin` UX-only, server 403 the real boundary, D-03); one shared `validateEncryptAndStoreCredential` helper for admin rotation + member self-service `/api/me/credential` (400-no-echo, session-userId only); exclusive shared-calendar designation made transactional + 404-guarded (CR-01 fix); gated `/admin` PWA route + conditional nav + `SetupBanner`. 12/12 must-haves verified; admin route-guard/nav-gating green in real Chromium (e2e 5/5). Deferred follow-ups: WR-01 bootstrap-race (Phase 12 reworks the bootstrap), broker `credentialSync.ts`/`CredentialSheet.tsx` crypto re-audit under full read access.
 
 ### Active
@@ -121,4 +122,4 @@ This document evolves at phase transitions and milestone boundaries.
 
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-_Last updated: 2026-06-13 — Phase 10 (Admin Role & Settings) complete; ADMIN-01/02/03 validated_
+_Last updated: 2026-06-14 — Phase 11 (Per-Event Reminders) complete; CAL-13/14 + NOTIF-04/05/06 validated (live round-trip deferred, 999.19)_