docs(phase-04): closure ceremony — milestone v1 complete

phase.complete CLI ran (commit n/a — CLI in-mem only) with documented
defects per recurring state.record-session bug:
- completed_phases stuck at 3 (should be 4)
- percent regressed to 75% (3/4 math; should be 100% — milestone-complete)
- ROADMAP Phase 4 row still [ ] despite roadmap_updated:true claim

Manual fix applied per saved memory (canonical workaround for CLI bug):

STATE.md:
- completed_phases: 3 → 4
- percent: 75 → 100
- progress bar: [█████████▓] 97% → [██████████] 100%

ROADMAP.md:
- Phase 4 row: [ ] → [x] with comprehensive closure annotation
  (8 plans + 3 debug sessions + 4 ROADMAP SCs + 5 D-P4-* + UAT
  33→36 + vitest 171→188 + bundle gates 6/6 + Tier-1 12 + Tier-2 added
  + operator ack 2026-05-26 + verifier audit PASSED 8ffc6cb)

Phase 4 closed end-to-end. Milestone v1 v2.0.0 complete (status:
milestone_complete already correctly set by CLI). Ready for v1.0 tag +
alpha redistribution per D-P4-04 (user routes out-of-band).

.planning/ROADMAP.md

@@ -35,7 +35,7 @@ Decimal phases appear between their surrounding integers in numeric order.
 - [x] **Phase 1: Stabilize video pipeline** — Collapse offscreen duality, fix MediaRecorder shadow, fix WebM ring buffer playability, replace `chrome.tabCapture` with offscreen `getDisplayMedia` (AMENDED from original DEC-003). **CLOSED 2026-05-20** via gsd-verifier goal-backward audit GREEN (17/17 must-haves: 11 REQs/charters + 6 cross-cutting gates; see `.planning/phases/01-stabilize-video-pipeline/01-VERIFICATION.md`). Closure arc: 2026-05-15 (Plan 01-07) → 2026-05-16 (REOPENED on D-13 multi-EBML bug) → Plan 01-08 (WebM remux via ts-ebml + webm-muxer) → Plans 01-09/01-10 (whole-desktop + welcome-tab UX) → Plan 01-11 (spike-pivot) → Plan 01-12 (Design Integration) → Plan 01-13 (UAT harness 15/15 GREEN, 2026-05-19) → Plan 01-14 (monitorTypeSurfaces picker) → Plan 01-10 cycle-2 ack 'All good' 2026-05-20 + 5 inter-cycle debug fixes + brand-rename polish. 14/14 plans; 5 operator acks; 153/153 vitest + 24/24 UAT + Tier-1 grep 12 FORBIDDEN_HOOK_STRINGS all GREEN.
 - [ ] **Phase 2: Stabilize export pipeline** — Close remaining export gaps (screenshot-at-click, meta.json schema, archive layout, manifest permission verification). Mostly already shipped via Plans 01-08 + 01-09 + 01-10 + 01-12 — narrowed scope post-re-phasing.
 - [ ] **Phase 3: SPEC §10 smoke verification** — End-to-end install-and-record-and-export pass against all 9 acceptance criteria. **ABSORBS** REQ-rrweb-dom-buffer + REQ-user-event-log verification (originally Phase 2) per 2026-05-20 re-phasing. UAT harness extended with A24+ assertions for rrweb/event-log contracts.
-- [ ] **Phase 4: Harden + clean up** _(optional)_ — P1/P2 follow-ups: SW state persistence, fetch interception, `meta.json` fields, `generate-icons.js` ESM/CJS, dead-code; plus deferred items from Phase 1 session (cursor visibility, dark-surface logo, tabs permission gap, 2 ffprobe flakes, ROADMAP backfill verification, rrweb 2.0.0-alpha.4 → stable v2 upgrade research).
+- [x] **Phase 4: Harden + clean up** _(optional)_ — P1/P2 follow-ups: SW state persistence, fetch interception, `meta.json` fields, `generate-icons.js` ESM/CJS, dead-code; plus deferred items from Phase 1 session (cursor visibility, dark-surface logo, tabs permission gap, 2 ffprobe flakes, ROADMAP backfill verification, rrweb 2.0.0-alpha.4 → stable v2 upgrade research). **CLOSED 2026-05-26** via gsd-verifier goal-backward audit GREEN (4/4 ROADMAP SCs + 11/11 observable truths + 0 overrides; commit `8ffc6cb`; see `.planning/phases/04-harden-clean-up-optional/04-VERIFICATION.md`). 8 plans landed (04-01..04-08; 04-08 inserted Wave 5.5 after Plan 04-04 SPIKE FAILED was empirically REFUTED-architecture via 2 /gsd-debug sessions on canvas-throttling); 5/5 D-P4-* charters CLOSED; 3 /gsd-debug sessions (canvas-throttling resolved, A33.1 SAVE-ack race fixed at `7e0da63`, dark-mode --mks-mark-stroke decoupling at `a8bcc17`); 1 operator-empirical ack cycle on Plan 04-06 ('Confirmed fixed' 2026-05-26 after TWEAK → debug fix → re-empirical); UAT harness 33→36 GREEN (A33 via 04-08 + A34 via 04-05 + A35 via 04-06 with 5 sub-checks incl. A35.5 light+dark decouple-proof); vitest 171→188 GREEN (with documented 04-CONTEXT #9/#10 ffprobe parallel-vitest flake family); bundle gates 6/6 PASS (Gate 2 `new Function` flipped 1→0 via Plan 04-02 setimmediate 4-mechanism layered mitigation); Tier-1 FORBIDDEN_HOOK_STRINGS unchanged at 12; Tier-2 leak gate added (Plan 04-08 synthetic-display-source dist/ check).
 
 ## Phase Details