docs(20): finalize phase plan (state, roadmap waves, patterns)

.planning/STATE.md

@@ -5,8 +5,8 @@ milestone_name: Operability & Polish
 current_phase: 18
 current_phase_name: Auto timezone detection and ability to change timezone
 status: executing
-stopped_at: Phase 20 context gathered
-last_updated: "2026-06-18T20:42:23.831Z"
+stopped_at: Phase 20 UI-SPEC approved
+last_updated: "2026-06-18T21:06:24.292Z"
 last_activity: 2026-06-18
 last_activity_desc: Phase 17 complete, transitioned to Phase 18
 progress:
@@ -30,7 +30,7 @@ See: .planning/PROJECT.md (updated 2026-06-16)
 
 Phase: 18 — Auto timezone detection and ability to change timezone
 Plan: Not started
-Status: Executing Phase 17
+Status: Ready to execute
 Last activity: 2026-06-18 — Phase 17 complete, transitioned to Phase 18
 
 ### ✅ Resolved Checkpoint — Phase 15 Plan 15-03 Task 2 (human-action)
@@ -274,9 +274,9 @@ Recent decisions affecting current work:
 
 ## Session Continuity
 
-Last session: 2026-06-18T20:42:23.817Z
-Stopped at: Phase 20 context gathered
-Resume file: .planning/phases/20-admin-member-editor-form-declutter/20-CONTEXT.md
+Last session: 2026-06-18T20:51:46.755Z
+Stopped at: Phase 20 UI-SPEC approved
+Resume file: .planning/phases/20-admin-member-editor-form-declutter/20-UI-SPEC.md
 
 ## Operator Next Steps