docs: project docs, scripts, deployment configs, and evidence

docs/evidence/ops/2026-03-28/quality/COVERAGE_REMEDIATION_20260328-151952.md

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+# 2026-03-28 Q-004 Coverage Remediation Pass 26
+
+## Scope
+
+- Re-verify the last open `Q-004` hygiene blocker after Pass 25.
+- Confirm the `frontend/admin` `Q-004` closure track is now honestly closable.
+- Re-check the previously unstable `router.tsx` full-suite coverage result in the same full validation run.
+
+## Changes
+
+### Frontend
+
+- No additional frontend code changes were required in this pass.
+- This pass is a strict re-validation of the previously landed frontend fixes that removed the real remaining blockers.
+
+### Backend
+
+- No backend code changes were required in this pass.
+
+## Verified Commands
+
+```powershell
+cd D:\project\frontend\admin
+npm.cmd run lint
+npm.cmd run build
+npm.cmd run test:coverage
+```
+
+## Results
+
+### Frontend coverage
+
+- Overall:
+  - statements `93.98%`
+  - branches `82.29%`
+  - functions `91.37%`
+  - lines `94.15%`
+- Key re-check:
+  - `src/app/router.tsx`: statements `100%`, branches `100%`, functions `100%`, lines `100%`
+
+### Validation outcomes
+
+- `lint` passed.
+- `build` passed.
+- Full frontend coverage passed with:
+  - `54` passing test files
+  - `248` passing tests
+- The latest successful `test:coverage` run no longer prints the previously recurring post-summary jsdom `AggregateError` network-noise lines.
+- The short-lived full-suite `router.tsx` coverage regression did not reproduce in the latest run.
+- A separate npm warning still prints after command completion:
+  - `Unknown user config "//git@github.com/"`
+  - this is external environment noise from npm user config, not a project-generated frontend failure
+
+## Real Conclusion
+
+- All previously identified frontend hotspots in this `Q-004` closure track remain closed and re-verified.
+- The last real validation-hygiene blocker is now closed.
+- The `frontend/admin` `Q-004` closure track can now be honestly declared closed.