docs(03-04): complete outbox worker plan — state machine GREEN, wired at boot

.planning/ROADMAP.md

@@ -106,7 +106,7 @@ Plans:
 
 **Wave 3** *(blocked on Wave 2)*
 
-- [ ] 03-04-PLAN.md — TDD: outbox worker state machine (D-05/06/07/08 retry/backoff/dead/conflict, edit-as-move ordering) + index.ts wiring
+- [x] 03-04-PLAN.md — TDD: outbox worker state machine (D-05/06/07/08 retry/backoff/dead/conflict, edit-as-move ordering) + index.ts wiring
 - [ ] 03-05-PLAN.md — Frontend create/edit slice: write client calls + Zustand keys + EventForm (D-01/02/11) + New Event FAB
 - [x] 03-07-PLAN.md — PWA install: VitePWA manifest + auth-safe SW denylist + icons + InstallPrompt (iOS walkthrough + Android prompt) (PWA-01/02)
 
@@ -161,7 +161,7 @@ Note: Phase 4 depends only on Phase 1 and can begin as soon as Phase 1 is comple
 |-------|----------------|--------|-----------|
 | 1. Foundation + Broker Spike | 4/4 | Complete   | 2026-06-04 |
 | 2. Calendar Display | 5/5 | Complete    | 2026-06-05 |
-| 3. Event Write-Back + PWA Install | 4/8 | In Progress|  |
+| 3. Event Write-Back + PWA Install | 5/8 | In Progress|  |
 | 4. Shared Lists + Live Sync | 0/? | Not started | - |
 | 5. Web Push Notifications | 0/? | Not started | - |
 
@@ -171,7 +171,7 @@ Note: Phase 4 depends only on Phase 1 and can begin as soon as Phase 1 is comple
 
 **Goal:** [Captured for future planning] Abstract the calendar backend behind a provider interface so Fastmail/CalDAV is one implementation among potentially many. Shipping with a single provider is fine, but the broker, sync, and event-expansion layers should be structured so additional providers (e.g. other CalDAV hosts, Google Calendar, generic ICS feeds) can be added without rework. Captures the "provider" seam as an explicit architectural concern.
 **Requirements:** TBD
-**Plans:** 4/8 plans executed
+**Plans:** 5/8 plans executed
 
 Plans: