feat: 운영 안정성과 세션 음성 경험 개선

apps/web/e2e/README.md

@@ -26,7 +26,7 @@ VITE_API_BASE=http://127.0.0.1:8000 npm run e2e
 
 Feature evidence map:
 
-- `session-persistence.spec.ts` is the primary DB-backed evidence for session runtime flows. It covers browser `openSessionStream()` persistence, Korean PII masking through the browser stream into DB-backed detail/review payloads, crisis learner-only safety persistence without a client AI reply, AI tutor live coach history, source-pack metadata round-trip, voice metadata persistence, learner worksheet/review persistence, session-end evaluation storage, explicit teacher session/turn reevaluation, and manual teacher UI evaluation retry from a real failed row into durable DB state. The AI tutor history test must see `status=ready` and `latency_ms>0`; degraded fallback must not pass as normal engine-backed coaching.
+- `session-persistence.spec.ts` is the primary DB-backed evidence for session runtime flows. It covers browser `openSessionStream()` persistence, Korean PII masking through the browser stream into DB-backed detail/review payloads, crisis learner-only safety persistence without a client AI reply, AI tutor live coach history, source-pack metadata round-trip, voice metadata persistence, learner worksheet/review persistence, session-end evaluation storage, explicit teacher session/turn reevaluation, and fail-closed admin engine configuration that rejects an unreachable gateway without mutating the durable setting. The AI tutor history test must see `status=ready` and `latency_ms>0`; degraded fallback must not pass as normal engine-backed coaching.
 - `kb-source-packs.spec.ts` is DB-backed source-pack sync evidence. It checks admin-only sync and source-scoped evaluator RAG lookup for the licensed source packs; evaluator retrieval 503 is a failure, not a skipped proof.
 - `session-review.spec.ts` is route-fixture UI regression evidence for review states, including delayed `평가 대기` to `평가 완료` polling, `평가 실패`, `AI 평가 재시도`, and pre/post input validation states. It does not prove that the evaluator wrote a DB row unless paired with `session-persistence.spec.ts`.
 - `teacher.spec.ts` mixes DB-backed teacher console paths with route-fixture queue/readability checks. Use the individual test body before citing it as persisted evidence.
@@ -60,6 +60,19 @@ $env:E2E_PUBLIC_STORAGE_STATE="./node_modules/.tmp/public-admin-auth.json"
 npx playwright test e2e/public-admin-visual.spec.ts --project=chromium-public-auth
 ```
 
+이 스모크에는 공식 EasyList의 과거 충돌 규칙(`.ad-root`, `.ad-section`)을 첫 paint부터
+주입한 상태로 운영 홈·AI 운영·사용자·권한·티켓 5경로의 실제 가시성을 확인하는 게이트가 포함된다.
+API 200, DOM 존재, selector count만으로는 통과하지 않는다.
+
+Production lazy-chunk recovery smoke (no sign-in state required):
+
+```powershell
+$env:E2E_PREVIEW_BUILD="1"
+$env:PLAYWRIGHT_SKIP_WEB_SERVER="1"
+$env:PLAYWRIGHT_BASE_URL="https://vignette.chanpaca.net"
+npx playwright test e2e/chunk-recovery-preview.spec.ts --project=chromium-single-run --workers=1
+```
+
 Notes:
 
 - `E2E_PUBLIC_AUTH=1` targets the public site and does not start the local Vite web server.