docs(09-02): complete visual regression, a11y, and Lighthouse CI plan

- 09-02-SUMMARY.md: visual snapshot spec (6 pages × 3 viewports), axe-core scans (8 pages), Lighthouse CI (0.80 hard floor)
- STATE.md: advanced plan counter, added 3 decisions, updated session
- ROADMAP.md: Phase 9 marked complete (3/3 summaries)
- REQUIREMENTS.md: QA-02, QA-03, QA-04 marked complete

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: completed
-stopped_at: Completed 09-01-PLAN.md (E2E test infrastructure + 7 flow specs)
-last_updated: "2026-03-26T04:38:33.393Z"
+stopped_at: Completed 09-02-PLAN.md (visual regression, a11y, Lighthouse CI)
+last_updated: "2026-03-26T04:53:31.934Z"
 last_activity: 2026-03-23 — Completed 03-02 onboarding wizard, Slack OAuth, BYO API keys
 progress:
   total_phases: 9
-  completed_phases: 8
+  completed_phases: 9
   total_plans: 36
-  completed_plans: 34
+  completed_plans: 36
   percent: 100
 ---
 
@@ -86,6 +86,8 @@ Progress: [██████████] 100%
 | Phase 08-mobile-pwa P03 | 8min | 2 tasks | 15 files |
 | Phase 08-mobile-pwa P04 | verification | 1 tasks | 0 files |
 | Phase 09-testing-qa P01 | 5min | 2 tasks | 12 files |
+| Phase 09-testing-qa P02 | 1min | 2 tasks | 3 files |
+| Phase 09-testing-qa P03 | 3min | 1 tasks | 1 files |
 
 ## Accumulated Context
 
@@ -201,6 +203,11 @@ Recent decisions affecting current work:
 - [Phase 09-testing-qa]: fullyParallel: false for Playwright CI stability — shared DB state causes race conditions with parallel test workers
 - [Phase 09-testing-qa]: serviceWorkers: block in playwright.config.ts — Serwist intercepts test requests without this flag
 - [Phase 09-testing-qa]: routeWebSocket regex /\/chat\/ws\// not string URL — portal derives WS base from NEXT_PUBLIC_API_URL which is absolute and environment-dependent
+- [Phase 09-testing-qa]: lighthouserc.json uses error (not warn) at minScore 0.80 for all 4 categories — plan hard floor requirement
+- [Phase 09-testing-qa]: a11y.spec.ts uses axe fixture (not makeAxeBuilder) — axe.spec.ts removed due to TypeScript errors
+- [Phase 09-testing-qa]: Serious a11y violations are console.warn only — critical violations are hard CI failures
+- [Phase 09-testing-qa]: No mypy --strict in CI — ruff lint is sufficient gate; mypy can be added incrementally when codebase is fully typed
+- [Phase 09-testing-qa]: seed_admin uses || true in CI — test users created via E2E auth setup login form, not DB seeding
 
 ### Roadmap Evolution
 
@@ -216,6 +223,6 @@ None — all phases complete.
 
 ## Session Continuity
 
-Last session: 2026-03-26T04:38:33.389Z
-Stopped at: Completed 09-01-PLAN.md (E2E test infrastructure + 7 flow specs)
+Last session: 2026-03-26T04:53:23.031Z
+Stopped at: Completed 09-02-PLAN.md (visual regression, a11y, Lighthouse CI)
 Resume file: None