docs(06-01): complete task history plan

- Create 06-01-SUMMARY.md with full execution documentation
- Update STATE.md: Phase 6 Plan 1 complete, decisions recorded
- Update ROADMAP.md: Phase 6 marked complete (1/1 plans)
- Mark HIST-01 and HIST-02 requirements complete

.planning/ROADMAP.md

@@ -22,7 +22,7 @@ See `milestones/v1.0-ROADMAP.md` for full phase details.
 **v1.1 Calendar & Polish (Phases 5-7):**
 
 - [x] **Phase 5: Calendar Strip** - Replace the stacked daily plan home screen with a horizontal scrollable date-strip and day-task list (completed 2026-03-16)
-- [ ] **Phase 6: Task History** - Record every task completion with a timestamp and expose a per-task history view
+- [x] **Phase 6: Task History** - Record every task completion with a timestamp and expose a per-task history view (completed 2026-03-16)
 - [ ] **Phase 7: Task Sorting** - Add alphabetical, interval, and effort sort options to task lists
 
 ## Phase Details
@@ -50,7 +50,7 @@ Plans:
   1. Every task completion (tap done in any view) is recorded in the database with a precise timestamp — data persists across app restarts
   2. From a task's detail or context menu the user can open a history view listing all past completion dates for that task in reverse-chronological order
   3. The history view shows a meaningful empty state if the task has never been completed
-**Plans:** 1 plan
+**Plans:** 1/1 plans complete
 Plans:
 - [ ] 06-01-PLAN.md — DAO query + history bottom sheet + TaskFormScreen integration + CalendarTaskRow navigation
 
@@ -74,5 +74,5 @@ Plans:
 | 3. Daily Plan and Cleanliness | v1.0 | 3/3 | Complete | 2026-03-16 |
 | 4. Notifications | v1.0 | 3/3 | Complete | 2026-03-16 |
 | 5. Calendar Strip | 2/2 | Complete   | 2026-03-16 | - |
-| 6. Task History | v1.1 | 0/1 | Planned | - |
+| 6. Task History | 1/1 | Complete   | 2026-03-16 | - |
 | 7. Task Sorting | v1.1 | 0/? | Not started | - |