Override Link extension `inclusive: false` via `.extend()` to decouple
it from `autolink: true`. Tiptap's source ties `inclusive` to `autolink`,
causing typed text after a link to inherit the link mark.
Also set `linkOnPaste: false` — autolink's PasteRule still auto-detects
pasted URLs without the sticky cursor issue.
Refs: ueberdosis/tiptap#2571, ueberdosis/tiptap#4249
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>