Three interrelated issues caused 4 tests to pass locally but fail on CI:
1. setup.ts only applied the URL.createObjectURL stub when it was
undefined, but jsdom already defines it (returning ''). Changed to
always override with configurable:true so the predictable 'blob:mock'
value is set in every environment.
2. FE-API-013 used Object.defineProperty (non-configurable in jsdom) and
MSW to handle a native fetch call. Replaced with vi.spyOn for both
URL.createObjectURL/revokeObjectURL and a direct fetch mock, which is
more reliable across environments.
3. FE-COMP-AUTHURL-012's vi.spyOn(URL, 'createObjectURL') returned the
same vi.fn() instance set in setup.ts, accumulating calls from all
prior tests in the file (1+8+7+6=22 instead of 6). Added mockClear()
immediately after the spy setup to reset the count.
jubnl