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

docs/evidence/ops/2026-03-28/quality/COVERAGE_REMEDIATION_20260328-143209.md

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+# 2026-03-28 Q-004 Coverage Remediation Pass 23
+
+## Scope
+
+- Continue strict `Q-004` closure work after Pass 22.
+- Fully close the remaining standalone 404 page hotspot in:
+  - `frontend/admin/src/pages/NotFoundPage/NotFoundPage.tsx`
+- Re-verify closure through targeted page tests and full frontend validation.
+
+## Changes
+
+### Frontend
+
+- Added dedicated 404-page coverage in:
+  - `frontend/admin/src/pages/NotFoundPage/NotFoundPage.test.tsx`
+- Newly covered behavior includes:
+  - 404 status rendering
+  - missing-page subtitle rendering
+  - primary recovery action rendering
+  - navigation back to `/dashboard`
+
+### Backend
+
+- No backend code changes were required in this pass.
+
+## Verified Commands
+
+```powershell
+cd D:\project\frontend\admin
+npm.cmd run test:run -- src/pages/NotFoundPage/NotFoundPage.test.tsx
+npm.cmd run lint
+npm.cmd run build
+npm.cmd run test:coverage
+```
+
+## Results
+
+### Frontend coverage
+
+- Overall:
+  - statements `93.69%`
+  - branches `81.95%`
+  - functions `91.24%`
+  - lines `93.85%`
+- Target area:
+  - `src/pages/NotFoundPage/NotFoundPage.tsx`: statements `100%`, branches `100%`, functions `100%`, lines `100%`
+
+### Validation outcomes
+
+- Targeted page validation passed:
+  - `1` passing test file
+  - `1` passing test
+- Full frontend coverage run now completes with:
+  - `52` passing test files
+  - `243` passing tests
+- The required sequential frontend validation path passed:
+  - `test:run -- src/pages/NotFoundPage/NotFoundPage.test.tsx`
+  - `lint`
+  - `build`
+  - `test:coverage`
+
+## Validation Notes
+
+- The successful frontend coverage run still emits post-summary jsdom `AggregateError` network-noise lines.
+  - The command exits with code `0`.
+  - This remains a real validation-hygiene issue and cannot be hidden or described as a fully clean run.
+
+## Real Conclusion
+
+- `src/pages/NotFoundPage/NotFoundPage.tsx` is no longer an open `Q-004` gap.
+- `Q-004` still cannot be honestly declared closed.
+- After this pass, the remaining higher-value frontend gaps narrow further to:
+  - `src/lib/hooks/useBreadcrumbs.ts`
+  - `src/app/providers/ThemeProvider.tsx`
+  - the post-summary jsdom `AggregateError` coverage-noise hygiene issue