docs(04): finalize phase plan (coverage gates + roadmap annotations)

.planning/STATE.md

@@ -2,10 +2,10 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: planning
-stopped_at: Phase 4 context gathered
-last_updated: "2026-06-08T01:32:10.141Z"
-last_activity: 2026-06-07
+status: executing
+stopped_at: Phase 4 UI-SPEC approved
+last_updated: "2026-06-09T14:25:21.889Z"
+last_activity: 2026-06-09 -- Phase 04 planning complete
 progress:
   total_phases: 15
   completed_phases: 3
@@ -27,8 +27,8 @@ See: .planning/PROJECT.md (updated 2026-06-07)
 
 Phase: 4
 Plan: Not started
-Status: Phase 03 complete — ready to plan Phase 04
-Last activity: 2026-06-07
+Status: Ready to execute
+Last activity: 2026-06-09 -- Phase 04 planning complete
 
 Progress: [█████░░░░░] 50% (3 of 6 phases)
 
@@ -126,6 +126,6 @@ Recent decisions affecting current work:
 
 ## Session Continuity
 
-Last session: 2026-06-08T01:32:10.093Z
-Stopped at: Phase 4 context gathered
-Resume file: .planning/phases/04-shared-lists-live-sync/04-CONTEXT.md
+Last session: 2026-06-09T13:44:22.701Z
+Stopped at: Phase 4 UI-SPEC approved
+Resume file: .planning/phases/04-shared-lists-live-sync/04-UI-SPEC.md