The transfer element's busy and state=error handling is now tested
through the fake widget host, and golem15-seo-image gets tests for the
upload id matching, the error display, Remove and the disabled state.
The README's test gate runs npm test.
vitest + happy-dom tests of the UI-SPEC backstops: E1 status thresholds
(29/30 characters, 580/581 px; 119/120 and 920/921 for descriptions)
with a mocked measureText and the counter's wrap contract; the E2 grammar
over every directive combination, the emitted values and the stacking
contract with unclipped en and pl labels; the E3 effective title,
word-boundary truncation and keyphrase stem matching; each E4 lint rule
and a clean file; E6 apply gating. happy-dom has no layout engine, so the
narrow-width rows check the stylesheet's layout contract.
