Registering @tiptap/extension-bubble-menu once per menu (link/table/image/
youtube) reused its fixed 'bubbleMenu' name. Tiptap v3 dedupes extensions by
name, so all but one collapsed and the rest rendered inline in the DOM,
permanently visible instead of floating on node-selection. Extend each with a
unique name (bubbleMenu_<key>). Rebuilt dist.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>