fix(e2e): stabilize semantic search fallback

[d-oit]

Summary

Stabilize the semantic-search fallback E2E test: block the app service worker so Playwright routing intercepts model requests, fulfill model/CDN requests with deterministic 404s, and assert the visible lexical TRIZ result. Set a 10s assertion timeout inside a 15s per-test timeout. No production semantic-search or workflow code changed.

Related context: #751 (this PR only changes test reliability).

Type of change

• fix: isolated E2E reliability issue
• No breaking change

Testing

• env -u NO_COLOR pnpm exec playwright test e2e/semantic-search.spec.ts --project=chromium --repeat-each=3 --retries=0 — 9 passed (29.8s).
• env -u NO_COLOR pnpm exec playwright test --retries=0 --grep-invert="probe: console timeline" — 600 passed, 4 skipped (8.8m), all four projects.
• env -u NO_COLOR ./scripts/quality_gate.sh — passed.
• env -u NO_COLOR pnpm run build — passed.

The untracked e2e/zz-probe.spec.ts remains untouched and is not part of this PR. A pre-existing React hydration mismatch in HomeView motion styles is documented in plans/151; it is not suppressed by this change. Scheduled run 36112610311 confirmed the nightly E2E job ran on its pre-change main revision; this branch's PR checks are the validation for this patch.

Risk

Low. Test-only behavior and planning evidence; no runtime application change.

---

📝 Summary by GitNexus

Summary

This appears to be a small, self-contained end-to-end test stabilization change, with accompanying planning documentation and no detected downstream reach.

🟢 LOW blast radius. An end-to-end semantic-search test change in e2e/semantic-search.spec.ts with no graph-detected dependents or affected execution flows.

The code change is concentrated in e2e/semantic-search.spec.ts, while the remaining changed symbols are documentation sections in plans/149-nightly-full-viewport-e2e-2026-09-24.md and plans/151-quality-gate-lint-cache-and-nightly-guard-2026-09-24.md. Review the semantic-search test behavior first, then verify that the follow-up documentation remains aligned with the test scope.

No high or critical risk files, cross-repo consumers, or affected flows were detected.

Added by GitNexus for PR #822. Edit freely — this block is replaced on the next review, everything above it is left untouched.

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Project	Deployment	Actions	Updated
do-knowledge-studio	Ready	Preview, v0	Sep 25, 2026 10:14am UTC

[github-actions]

Blocked merge diagnosis — blocked
⏳ Check run(s) still in progress: ["shellcheck","Dependency Verify","Quality Gate","Unit Tests","Codacy Static Code Analysis","labeler","Diagnose Blocked Merge State","Infrastructure as Code Security","Shell Script Security Analysis","Secret Detection","Trivy Filesystem Security Scan","commitlint","Analyze (javascript-typescript)","Analyze (actions)"]

[nexuscheck]

GitNexus Review · PR #822

GitNexus reviewed 3 changed files.

🤖 Agent context — 4 symbols · 3 files

Summary

This appears to be a small, self-contained end-to-end test stabilization change, with accompanying planning documentation and no detected downstream reach.

🟢 LOW blast radius. An end-to-end semantic-search test change in e2e/semantic-search.spec.ts with no graph-detected dependents or affected execution flows.

The code change is concentrated in e2e/semantic-search.spec.ts, while the remaining changed symbols are documentation sections in plans/149-nightly-full-viewport-e2e-2026-09-24.md and plans/151-quality-gate-lint-cache-and-nightly-guard-2026-09-24.md. Review the semantic-search test behavior first, then verify that the follow-up documentation remains aligned with the test scope.

No high or critical risk files, cross-repo consumers, or affected flows were detected.

🟢 LOW blast radius — no downstream dependents were found in the code graph.

Blast Level	Dependents	Modules	Files
🟢 LOW	0	0	3

What changed

Symbol Changes (4)

Kind	Symbol	Location
Section	Plan 149 — Nightly E2E Sweep Covers Every Viewport (2026-09-24)	plans/149-nightly-full-viewport-e2e-2026-09-24.md:1
Section	5. Follow-ups	plans/149-nightly-full-viewport-e2e-2026-09-24.md:183
Section	Plan 151 — Quality-Gate Lint-Cache Fallback + Nightly Scope Guard (2026-09-24)	plans/151-quality-gate-lint-cache-and-nightly-guard-2026-09-24.md:1
Section	5. Follow-ups	plans/151-quality-gate-lint-cache-and-nightly-guard-2026-09-24.md:113

Changed Files (3)

File	Status
e2e/semantic-search.spec.ts	🟡 modified
plans/149-nightly-full-viewport-e2e-2026-09-24.md	🟡 modified
plans/151-quality-gate-lint-cache-and-nightly-guard-2026-09-24.md	🟡 modified

Full detail lives in the GitNexus check run for this commit.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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