Linking a whole paragraph also linked its paragraph mark, and Enter
copied the link at the split into the new paragraph's mark, so everything
typed in the paragraphs Enter made (above or below) became the link, and
hovering anywhere near the end of the text showed the link's tooltip.
- doc: a paragraph mark never takes a hyperlink (format_range, split_off)
- engine: typing at either end of a link isn't linked; inside it is (Word)
- ui: hover tooltip and Ctrl+click only on the linked text itself
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>