docs(10-01): complete dead-code-cleanup plan

- Create 10-01-SUMMARY.md: deleted 3 orphaned v1.0 daily plan files, removed DailyPlanState
- Update STATE.md: position, decisions, blocker resolved, session info
- Update ROADMAP.md: Phase 10 complete, 10-01-PLAN.md checked off
- Update REQUIREMENTS.md: CLN-01 marked complete

.planning/phases/10-dead-code-cleanup/10-01-SUMMARY.md

@@ -0,0 +1,98 @@
+---
+phase: 10-dead-code-cleanup
+plan: 01
+subsystem: ui
+tags: [flutter, dead-code, cleanup, daily-plan, calendar]
+
+# Dependency graph
+requires:
+  - phase: 05-calendar-strip
+    provides: "Calendar strip that superseded daily_plan_providers.dart, daily_plan_task_row.dart, progress_card.dart"
+provides:
+  - "Three orphaned v1.0 daily plan presentation files removed from codebase"
+  - "DailyPlanState class removed; TaskWithRoom class retained in daily_plan_models.dart"
+affects: []
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: []
+
+key-files:
+  created: []
+  modified:
+    - lib/features/home/domain/daily_plan_models.dart
+
+key-decisions:
+  - "DailyPlanDao kept in database.dart registration — still used by notification/settings service; only the presentation layer files were deleted"
+  - "TaskWithRoom retained in daily_plan_models.dart — actively imported by calendar_dao.dart, calendar_providers.dart, and related calendar files"
+
+patterns-established: []
+
+requirements-completed: [CLN-01]
+
+# Metrics
+duration: 5min
+completed: 2026-03-19
+---
+
+# Phase 10 Plan 01: Dead Code Cleanup Summary
+
+**Deleted three orphaned v1.0 daily plan presentation files and stripped DailyPlanState from domain models, leaving TaskWithRoom intact for the calendar system — zero test/analysis regressions across all 144 tests.**
+
+## Performance
+
+- **Duration:** ~5 min
+- **Started:** 2026-03-19T00:00:54Z
+- **Completed:** 2026-03-19T00:05:00Z
+- **Tasks:** 2
+- **Files modified:** 4 (3 deleted, 1 trimmed)
+
+## Accomplishments
+
+- Deleted `daily_plan_providers.dart`, `daily_plan_task_row.dart`, and `progress_card.dart` — all orphaned since Phase 5 replaced the daily plan UI with the calendar strip
+- Removed `DailyPlanState` class from `daily_plan_models.dart` (it was only referenced by the now-deleted providers file)
+- Preserved `TaskWithRoom` in `daily_plan_models.dart` — confirmed it remains importable by calendar system files
+- `dart analyze` reports zero issues; all 144 tests pass with no regressions
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Delete orphaned files and remove DailyPlanState** - `510529a` (chore)
+2. **Task 2: Verify zero regressions** - verification only, no file changes
+
+**Plan metadata:** (docs commit — see final commit)
+
+## Files Created/Modified
+
+- `lib/features/home/domain/daily_plan_models.dart` - Removed DailyPlanState class (lines 16-31); TaskWithRoom preserved
+- `lib/features/home/presentation/daily_plan_providers.dart` - DELETED (orphaned v1.0 file)
+- `lib/features/home/presentation/daily_plan_task_row.dart` - DELETED (orphaned v1.0 file)
+- `lib/features/home/presentation/progress_card.dart` - DELETED (orphaned v1.0 file)
+
+## Decisions Made
+
+- DailyPlanDao was NOT removed from `database.dart` — it is still registered in the `@DriftDatabase` annotation and used by `settings_screen.dart`. Only the presentation layer files were deleted.
+- TaskWithRoom was kept because it is imported by: `calendar_dao.dart`, `calendar_providers.dart`, `calendar_models.dart`, `calendar_day_list.dart`, `calendar_task_row.dart`, and `daily_plan_dao.dart`.
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Phase 10 dead code cleanup complete
+- No blockers — dead code that was tracked as a blocker in STATE.md is now resolved
+
+---
+*Phase: 10-dead-code-cleanup*
+*Completed: 2026-03-19*