The underline was implemented via border-bottom with a hardcoded
var(--accent-blue), ignoring the per-type color set on the element.
Changed to currentColor so the underline inherits the dynamic color.
Also removed the no-op textDecorationColor inline style (text-decoration
is none; the visual underline comes from border-bottom).
Bonus: fixed pre-existing TS build error in useEditorSave.test.ts
(vi.Mock namespace → Mock type import).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
