docs(09-01): complete frequency picker rework plan

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: "Ready for /gsd:plan-phase 8"
-stopped_at: Completed 08-task-delete 08-02-PLAN.md
-last_updated: "2026-03-18T20:08:14.841Z"
+stopped_at: Completed 09-task-creation-ux 09-01-PLAN.md
+last_updated: "2026-03-18T21:46:51.068Z"
 last_activity: 2026-03-18 — Created v1.2 milestone
 progress:
   total_phases: 3
-  completed_phases: 1
-  total_plans: 2
-  completed_plans: 2
+  completed_phases: 2
+  total_plans: 3
+  completed_plans: 3
   percent: 0
 ---
 
@@ -44,6 +44,7 @@ Progress: [░░░░░░░░░░] 0% (0/3 phases)
 | Tests | 89 | 108 | TBD |
 | Phase 08-task-delete P01 | 9 | 2 tasks | 11 files |
 | Phase 08-task-delete P02 | 2 | 2 tasks | 3 files |
+| Phase 09-task-creation-ux P01 | 2 | 1 tasks | 4 files |
 
 ## Accumulated Context
 
@@ -55,6 +56,7 @@ Decisions archived to PROJECT.md Key Decisions table.
 - [Phase 08-task-delete]: Migration tests updated to only test v1->v3 and v2->v3 paths since AppDatabase.schemaVersion=3 always migrates to v3
 - [Phase 08-task-delete]: smartDeleteTask kept separate from deleteTask to preserve existing hard-delete path for cascade/other uses
 - [Phase 08-task-delete]: Delete button placed after history section with divider, visible only in edit mode
+- [Phase 09-task-creation-ux]: Picker is single source of truth: _resolveFrequency() reads from picker always; _ShortcutFrequency enum handles bidirectional sync via toPickerValues()/fromPickerValues()
 
 ### Pending Todos
 
@@ -66,7 +68,7 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-03-18T20:03:07.081Z
-Stopped at: Completed 08-task-delete 08-02-PLAN.md
+Last session: 2026-03-18T21:46:51.066Z
+Stopped at: Completed 09-task-creation-ux 09-01-PLAN.md
 Resume file: None
 Next action: /gsd:plan-phase 8