# 2026-03-28 Q-004 Coverage Remediation Pass 8

## Scope

- Continue strict `Q-004` closure work after Pass 7.
- Fully close the remaining `AuthProvider` frontend provider cluster before moving to the next task.
- Re-verify that closure through targeted tests plus full frontend validation.

## Changes

### Frontend

- Expanded provider behavior coverage in:
  - `frontend/admin/src/app/providers/AuthProvider.test.tsx`
- Newly covered behavior includes:
  - reusing an already-authenticated in-memory session when the access token is still valid
  - authenticated-but-missing-user fallback when no backend session cookie exists
  - refresh-session success with role lookup success
  - refresh-session success with role lookup failure returning an empty role set
  - refresh-session failure cleanup
  - `onLoginSuccess` token persistence, user persistence, role persistence, and CSRF bootstrap
  - `refreshUser` success and error-logging branches
  - `logout` success and failure cleanup branches, including navigation to `/login`

### 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/providers/AuthProvider.test.tsx
npm.cmd run lint
npm.cmd run build
npm.cmd run test:coverage
```

## Results

### Frontend coverage

- Overall:
  - statements `76.00%`
  - branches `63.91%`
  - functions `75.07%`
  - lines `76.84%`
- Target areas:
  - `src/app/providers`: statements `96.38%`, branches `93.75%`
  - `src/app/providers/AuthProvider.tsx`: statements `100%`, branches `100%`, functions `100%`, lines `100%`
  - `src/pages/auth/LoginPage/LoginPage.tsx`: statements `47.93%`, branches `63.63%`
  - `src/pages/auth/RegisterPage/RegisterPage.tsx`: statements `77.63%`, branches `60.65%`
  - `src/pages/admin/ProfileSecurityPage/ProfileSecurityPage.tsx`: statements `70.17%`, branches `48.97%`

## Validation Notes

- Frontend full coverage now completes with `41` passing test files and `141` passing tests.
- 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

- `AuthProvider` is no longer an open `Q-004` gap.
- `Q-004` still cannot be honestly declared closed.
- The remaining highest-value frontend gaps are now more concentrated in:
  - `LoginPage`
  - `RegisterPage`
  - deeper remaining `ProfileSecurityPage` branches
  - `lib/http`