docs(phase-3): add validation strategy

.planning/phases/03-interaction-quality-and-completeness/03-VALIDATION.md

@@ -0,0 +1,92 @@
+---
+phase: 3
+slug: interaction-quality-and-completeness
+status: draft
+nyquist_compliant: false
+wave_0_complete: false
+created: 2026-03-11
+---
+
+# Phase 3 — Validation Strategy
+
+> Per-phase validation contract for feedback sampling during execution.
+
+---
+
+## Test Infrastructure
+
+| Property | Value |
+|----------|-------|
+| **Framework** | Vitest 4.0.18 + @testing-library/react + jsdom |
+| **Config file** | `frontend/vite.config.ts` (test section) |
+| **Quick run command** | `cd frontend && bun vitest run --reporter=verbose` |
+| **Full suite command** | `cd frontend && bun vitest run` |
+| **Estimated runtime** | ~20 seconds |
+
+---
+
+## Sampling Rate
+
+- **After every task commit:** Run `cd frontend && bun vitest run --reporter=verbose`
+- **After every plan wave:** Run `cd frontend && bun vitest run && bun run build`
+- **Before `/gsd:verify-work`:** Full suite must be green
+- **Max feedback latency:** 20 seconds
+
+---
+
+## Per-Task Verification Map
+
+| Task ID | Plan | Wave | Requirement | Test Type | Automated Command | File Exists | Status |
+|---------|------|------|-------------|-----------|-------------------|-------------|--------|
+| 03-00-01 | 00 | 0 | IXTN-01 | unit stub | `bun vitest run src/components/BudgetSetup.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-00-02 | 00 | 0 | IXTN-05, STATE-02 | unit stub | `bun vitest run src/pages/CategoriesPage.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-00-03 | 00 | 0 | STATE-01 | unit stub | `bun vitest run src/pages/DashboardPage.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-00-04 | 00 | 0 | STATE-03 | unit stub | `bun vitest run src/components/BillsTracker.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-01-01 | 01 | 1 | IXTN-02, IXTN-03 | unit | `bun vitest run src/components/InlineEditCell.test.tsx` | ✅ extend | ⬜ pending |
+| 03-01-02 | 01 | 1 | IXTN-01 | unit | `bun vitest run src/pages/LoginPage.test.tsx src/pages/RegisterPage.test.tsx` | ✅ extend | ⬜ pending |
+| 03-01-03 | 01 | 1 | IXTN-01 | unit | `bun vitest run src/components/BudgetSetup.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-02-01 | 02 | 1 | IXTN-05 | unit | `bun vitest run src/pages/CategoriesPage.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-02-02 | 02 | 1 | STATE-01 | unit | `bun vitest run src/pages/DashboardPage.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-02-03 | 02 | 1 | STATE-02 | unit | `bun vitest run src/pages/CategoriesPage.test.tsx` | ❌ W0 | ⬜ pending |
+| 03-02-04 | 02 | 1 | STATE-03 | unit | `bun vitest run src/components/BillsTracker.test.tsx` | ❌ W0 | ⬜ pending |
+
+*Status: ⬜ pending · ✅ green · ❌ red · ⚠️ flaky*
+
+---
+
+## Wave 0 Requirements
+
+- [ ] `frontend/src/components/BudgetSetup.test.tsx` — stubs for IXTN-01 (budget form spinner)
+- [ ] `frontend/src/pages/CategoriesPage.test.tsx` — stubs for IXTN-05 (delete confirmation), STATE-02 (empty state)
+- [ ] `frontend/src/pages/DashboardPage.test.tsx` — stubs for STATE-01 (dashboard empty state)
+- [ ] `frontend/src/components/BillsTracker.test.tsx` — stubs for STATE-03 (tinted skeleton)
+
+**Existing tests to extend (no Wave 0 needed):**
+- `LoginPage.test.tsx` — add IXTN-01 spinner assertion
+- `RegisterPage.test.tsx` — add IXTN-01 spinner assertion
+- `InlineEditCell.test.tsx` — add IXTN-02 pencil icon + IXTN-03 flash callbacks
+
+---
+
+## Manual-Only Verifications
+
+| Behavior | Requirement | Why Manual | Test Instructions |
+|----------|-------------|------------|-------------------|
+| Pencil icon hover animation feels smooth | IXTN-02 | CSS transition quality | Hover over editable cells; pencil should fade in smoothly ~150ms |
+| Save flash color is visually pleasant | IXTN-03 | Color perception | Edit and save a value; row should flash soft green, not harsh |
+| Error flash + revert feels natural | IXTN-03 | Interaction quality | Trigger a save error; row should flash red briefly, value reverts |
+| Empty state looks balanced and inviting | STATE-01/02 | Visual composition | View dashboard with no budgets; icon + text + CTA should feel balanced |
+| Skeleton tinting matches section colors | STATE-03 | Visual consistency | Observe loading state; skeleton pulse colors should match their section |
+
+---
+
+## 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 < 20s
+- [ ] `nyquist_compliant: true` set in frontmatter
+
+**Approval:** pending