docs(phase-2): add validation strategy

.planning/phases/02-rooms-and-tasks/02-VALIDATION.md

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+---
+phase: 2
+slug: rooms-and-tasks
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-15
+---
+
+# Phase 2 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | flutter_test (built-in) |
+| **Config file** | none — standard Flutter test setup |
+| **Quick run command** | `flutter test test/features/rooms/ test/features/tasks/ test/features/templates/` |
+| **Full suite command** | `flutter test` |
+| **Estimated runtime** | ~15 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `flutter test test/features/rooms/ test/features/tasks/ test/features/templates/`
+- **After every plan wave:** Run `flutter test`
+- **Before `/gsd:verify-work`:** Full suite must be green
+- **Max feedback latency:** 15 seconds
+
+---
+
+## Per-Task Verification Map
+
+| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 02-01-01 | 01 | 1 | ROOM-01 | unit | `flutter test test/features/rooms/data/rooms_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-01-02 | 01 | 1 | ROOM-02 | unit | `flutter test test/features/rooms/data/rooms_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-01-03 | 01 | 1 | ROOM-03 | unit | `flutter test test/features/rooms/data/rooms_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-01-04 | 01 | 1 | ROOM-04 | unit | `flutter test test/features/rooms/data/rooms_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-01-05 | 01 | 1 | ROOM-05 | unit | `flutter test test/features/rooms/data/rooms_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-01 | 02 | 1 | TASK-01 | unit | `flutter test test/features/tasks/data/tasks_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-02 | 02 | 1 | TASK-02 | unit | `flutter test test/features/tasks/data/tasks_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-03 | 02 | 1 | TASK-03 | unit | `flutter test test/features/tasks/data/tasks_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-04 | 02 | 1 | TASK-04 | unit | `flutter test test/features/tasks/domain/scheduling_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-05 | 02 | 1 | TASK-05 | unit | `flutter test test/features/tasks/data/tasks_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-06 | 02 | 1 | TASK-06 | unit | `flutter test test/features/tasks/data/tasks_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-07 | 02 | 1 | TASK-07 | unit | `flutter test test/features/tasks/data/tasks_dao_test.dart` | ❌ W0 | ⬜ pending |
+| 02-02-08 | 02 | 1 | TASK-08 | unit | `flutter test test/features/tasks/domain/scheduling_test.dart` | ❌ W0 | ⬜ pending |
+| 02-03-01 | 03 | 2 | TMPL-01 | unit | `flutter test test/features/templates/task_templates_test.dart` | ❌ W0 | ⬜ pending |
+| 02-03-02 | 03 | 2 | TMPL-02 | unit | `flutter test test/features/templates/task_templates_test.dart` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `test/features/rooms/data/rooms_dao_test.dart` — stubs for ROOM-01 through ROOM-05
+- [ ] `test/features/tasks/data/tasks_dao_test.dart` — stubs for TASK-01 through TASK-03, TASK-05 through TASK-07
+- [ ] `test/features/tasks/domain/scheduling_test.dart` — stubs for TASK-04, TASK-07 next due logic, TASK-08 overdue detection
+- [ ] `test/features/templates/task_templates_test.dart` — stubs for TMPL-01, TMPL-02
+
+*Framework already installed; no additional test dependencies needed.*
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| Drag-and-drop room reorder visual | ROOM-04 | Gesture interaction requires device/emulator | Long-press room card, drag to new position, verify order persists |
+| Task completion checkbox tap | TASK-07 | Tap interaction + visual feedback | Tap leading checkbox, verify checkmark appears and next due updates |
+| Overdue date text color | TASK-08 | Visual color assertion | Create task with past due date, verify due date text is warm red/coral |
+| Cleanliness progress bar color | ROOM-05 | Visual gradient assertion | Create room with mix of on-time and overdue tasks, verify bar color shifts |
+| Template selection bottom sheet | TMPL-01 | Multi-step UI flow | Create room, verify template prompt appears, check/uncheck templates |
+
+---
+
+## Validation Sign-Off
+
+- [ ] All tasks have `<automated>` verify or Wave 0 dependencies
+- [ ] Sampling continuity: no 3 consecutive tasks without automated verify
+- [ ] Wave 0 covers all MISSING references
+- [ ] No watch-mode flags
+- [ ] Feedback latency < 15s
+- [ ] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending