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.

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.

cd D:\project\frontend\admin
npm.cmd run lint
npm.cmd run build
npm.cmd run test: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%

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

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.