message: fix(selection): fix className breaking on svg elements
diff: @@ -63,7 +63,7 @@ const validMouseup$$ = fromEvent<MouseEvent>(window, 'mouseup', true).pipe(
  filter(({ target }) => (
  config.active &&
  window.name !== 'saladict-frame' &&
  - (!target || !target['className'] || !target['className'].startsWith('saladict-'))
  + (!target || typeof target['className'] !== 'string' || !target['className'].startsWith('saladict-'))
  )),
  // if user click on a selected text,
  // getSelection would reture the text before the highlight disappears
  