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

docs/evidence/ops/2026-03-28/quality/COVERAGE_REMEDIATION_20260328-110341.md

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+# 2026-03-28 Q-004 Coverage Remediation Pass 15
+
+## Scope
+
+- Continue strict `Q-004` closure work after Pass 14.
+- Close the remaining low-cost shell and safety-fallback hotspots in:
+  - `frontend/admin/src/app/App.tsx`
+  - `frontend/admin/src/app/RootLayout.tsx`
+  - `frontend/admin/src/components/common/ErrorBoundary/ErrorBoundary.tsx`
+- Re-verify closure through targeted shell tests plus full frontend validation.
+
+## Changes
+
+### Frontend
+
+- Added shell and boundary coverage in:
+  - `frontend/admin/src/app/App.test.tsx`
+  - `frontend/admin/src/app/RootLayout.test.tsx`
+  - `frontend/admin/src/components/common/ErrorBoundary/ErrorBoundary.test.tsx`
+- Newly covered behavior includes:
+  - app shell wiring between `ErrorBoundary`, `Suspense`, and `RouterProvider`
+  - `RootLayout` wrapping the route outlet in `AuthProvider`
+  - `ErrorBoundary` child passthrough, custom fallback rendering, default fallback rendering, and reset behavior
+- Test hygiene hardening:
+  - `ErrorBoundary` tests now suppress expected jsdom uncaught-error noise from deliberate throw cases so the targeted path stays clean
+
+### Backend
+
+- No backend code changes were required in this pass.
+
+## Verified Commands
+
+```powershell
+cd D:\project\frontend\admin
+npm.cmd run test:run -- src/app/App.test.tsx src/app/RootLayout.test.tsx src/components/common/ErrorBoundary/ErrorBoundary.test.tsx
+npm.cmd run lint
+npm.cmd run build
+npm.cmd run test:coverage
+```
+
+## Results
+
+### Frontend coverage
+
+- Overall:
+  - statements `89.72%`
+  - branches `77.57%`
+  - functions `84.48%`
+  - lines `90.64%`
+- Target areas:
+  - `src/app/App.tsx`: statements `100%`, branches `100%`, functions `100%`, lines `100%`
+  - `src/app/RootLayout.tsx`: statements `100%`, branches `100%`, functions `100%`, lines `100%`
+  - `src/components/common/ErrorBoundary/ErrorBoundary.tsx`: statements `100%`, branches `83.33%`, functions `100%`, lines `100%`
+
+## Validation Notes
+
+- Frontend full coverage now completes with `47` passing test files and `214` passing tests.
+- The required sequential frontend validation path passed:
+  - `test:run -- src/app/App.test.tsx src/app/RootLayout.test.tsx src/components/common/ErrorBoundary/ErrorBoundary.test.tsx`
+  - `lint`
+  - `build`
+  - `test:coverage`
+- The successful frontend coverage run still emits one post-summary jsdom `AggregateError` network-noise line.
+  - It does not fail the command.
+  - It remains a real validation-hygiene issue and should continue to be tracked honestly.
+
+## Real Conclusion
+
+- `src/app/App.tsx` is no longer an open `Q-004` gap.
+- `src/app/RootLayout.tsx` is no longer an open `Q-004` gap.
+- `src/components/common/ErrorBoundary/ErrorBoundary.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/app/router.tsx`
+  - `src/pages/admin/DashboardPage/DashboardPage.tsx`
+  - shared page-state coverage such as `src/components/feedback/PageState/PageState.tsx`
+  - the post-summary jsdom `AggregateError` coverage-noise hygiene issue