T012

A test ends with @kerf-js/core/browser listeners, intervals or subscribed values still open (checked by @kerf-js/core/test after each test).

Fix: Unmount what the test created (dispose any createRoot), or fix the leak.

Status in kerf@0.1.0: reported by @kerf-js/core/test after each test.

A test that needs it on purpose keeps it with a reason: // kerf-allow T012: <why> in the file header (whole file) or on the line above.