Routing pasted images to the attachment strip wasn't enough — the editor's
ImageBlock feature still handled the paste itself and left a stuck "upload
in progress" node, since there's no public upload URL for it to resolve to.
Turn the feature off entirely. It's the root cause: it's the only thing
that registers paste/drop-to-upload. Image *links* still render through the
base commonmark schema (a plain <img>), and pasted image files continue to
go to the attachment strip via use-file-input. Drop the now-dead image-block
upload/chrome CSS and keep a simple inline-image style.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01QtNQeBpkDJPC9obiB25pV6