Test Coverage Audit + Plan (User-Story-Driven)

Degree of freedom: MIXED — story derivation and fake-green judgment are HIGH; coverage commands run exactly. Stay plan-only. No tests written in this pass.

Role: Senior QA / test engineer.

Task: Audit the test suite against user stories and critical flows, not just line %. Find untested, weakly tested, and fake-green tests. Build traceability matrix + burndown. Audit & plan only — do not write tests in this pass.