docs(state): record phase 20 context session

.planning/STATE.md

@@ -5,16 +5,16 @@ milestone_name: Operability & Polish
 current_phase: 18
 current_phase_name: Auto timezone detection and ability to change timezone
 status: executing
-stopped_at: Phase 17 UI-SPEC approved
-last_updated: "2026-06-18T17:11:30.158Z"
+stopped_at: Phase 20 context gathered
+last_updated: "2026-06-18T20:42:23.831Z"
 last_activity: 2026-06-18
 last_activity_desc: Phase 17 complete, transitioned to Phase 18
 progress:
-  total_phases: 26
+  total_phases: 27
   completed_phases: 12
   total_plans: 55
   completed_plans: 54
-  percent: 46
+  percent: 44
 ---
 
 # Project State
@@ -274,9 +274,9 @@ Recent decisions affecting current work:
 
 ## Session Continuity
 
-Last session: 2026-06-18T15:00:30.986Z
-Stopped at: Phase 17 UI-SPEC approved
-Resume file: .planning/phases/17-ui-optimization-polish/17-UI-SPEC.md
+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
 
 ## Operator Next Steps