docs: start milestone v1.2 Polish & Task Management

Define requirements (9 total: task delete, creation UX, cleanup),
create roadmap (phases 8-10), and update PROJECT.md with new
milestone goals. Room cover photos dropped from scope.

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

.planning/REQUIREMENTS.md

@@ -0,0 +1,91 @@
+# Requirements: HouseHoldKeaper
+
+**Defined:** 2026-03-18
+**Core Value:** Users can see what needs doing today, mark it done, and trust the app to schedule the next occurrence — without thinking about it.
+
+## v1.2 Requirements
+
+Requirements for milestone v1.2 Polish & Task Management. Each maps to roadmap phases.
+
+### Task Delete
+
+- [ ] **DEL-01**: User can delete a task from the task edit form via a clearly visible delete action
+- [ ] **DEL-02**: Deleting a task that has never been completed removes it from the database entirely (hard delete)
+- [ ] **DEL-03**: Deleting a task that has been completed at least once deactivates it instead (soft delete) — task is hidden from all active views but preserved in the database for future statistics
+- [ ] **DEL-04**: User sees a confirmation before deleting/deactivating a task
+
+### Task Creation UX
+
+- [ ] **TCX-01**: Frequency picker presents an intuitive "Every [N] [unit]" interface instead of a flat grid of preset chips
+- [ ] **TCX-02**: Common frequencies (daily, weekly, biweekly, monthly) are available as quick-select shortcuts without scrolling through all options
+- [ ] **TCX-03**: User can set any arbitrary interval (e.g., every 5 days, every 3 weeks, every 2 months) without needing to select "Custom" first
+- [ ] **TCX-04**: The frequency picker preserves all existing interval types and scheduling behavior (calendar-anchored monthly/quarterly/yearly with anchor memory)
+
+### Cleanup
+
+- [ ] **CLN-01**: Dead code from v1.0 daily plan (daily_plan_providers.dart, daily_plan_task_row.dart, progress_card.dart) is removed without breaking notification service (DailyPlanDao must be preserved)
+
+## Future Requirements
+
+Deferred to future release. Tracked but not in current roadmap.
+
+### Data
+
+- **DATA-01**: User can export all data as JSON
+- **DATA-02**: User can import data from JSON backup
+
+### Localization
+
+- **LOC-01**: User can switch UI language to English
+
+### v2.0
+
+- **ONB-01**: Onboarding wizard for first-time users
+- **ACC-01**: User can pick a custom accent color for the app theme
+- **STAT-01**: Statistics & insights dashboard showing task completion trends
+
+## Out of Scope
+
+Explicitly excluded. Documented to prevent scope creep.
+
+| Feature | Reason |
+|---------|--------|
+| Room cover photos from camera or gallery | Dropped — clean design system preferred |
+| User accounts & cloud sync | Local-only by design |
+| Leaderboards & points ranking | Not a gamification app |
+| Subscription model / in-app purchases | Free forever |
+| Family profile sharing across devices | Single-device app |
+| Server-side infrastructure | Zero backend |
+| AI-powered task suggestions | Overkill for curated templates |
+| Per-task push notifications | Daily summary is more effective |
+| Firebase or any Google cloud services | Contradicts local-first design |
+| Real-time cross-device sync | Potential future self-hosted feature |
+| Tablet-optimized layout | Future enhancement |
+| Weekly/monthly calendar views | Date strip is sufficient for task app |
+| Drag tasks between days | Tasks auto-schedule based on frequency |
+| Calendar sync (Google/Apple) | Contradicts local-first, offline-only design |
+
+## Traceability
+
+Which phases cover which requirements. Updated during roadmap creation.
+
+| Requirement | Phase | Status |
+|-------------|-------|--------|
+| DEL-01 | Phase 8 | Planned |
+| DEL-02 | Phase 8 | Planned |
+| DEL-03 | Phase 8 | Planned |
+| DEL-04 | Phase 8 | Planned |
+| TCX-01 | Phase 9 | Planned |
+| TCX-02 | Phase 9 | Planned |
+| TCX-03 | Phase 9 | Planned |
+| TCX-04 | Phase 9 | Planned |
+| CLN-01 | Phase 10 | Planned |
+
+**Coverage:**
+- v1.2 requirements: 9 total
+- Mapped to phases: 9
+- Unmapped: 0
+
+---
+*Requirements defined: 2026-03-18*
+*Last updated: 2026-03-18 after roadmap creation (phases 8-10)*