[JammingBen]

Description

Saving a Markdown file in the text editor deleted every image embed that was not alone in its paragraph, together with the table cell or paragraph (text included) around it.

Tiptap creates schema-invalid content for such images (ueberdosis/tiptap#8714), and the Yjs binding drops the invalid nodes.

• Images in the Markdown editor are now inline, as they are in Markdown. A lone image stays wrapped in its paragraph. This workaround is marked with a FIXME and can go once the tiptap issue is fixed.
• Resized images are saved as <img>. One that starts a paragraph with more lines, e.g. before a hard break, is now read back as a paragraph, in the editor and in the read-only viewer. Hand-written HTML blocks stay unchanged.
• An unsized hand-written <img> next to text stays raw HTML, so it isn't rewritten as broken Markdown, e.g. for a source with a space in it.
• Images can no longer be inserted into code-like blocks (code, frontmatter, raw HTML), where an inline image would split the block. Toolbar and slash command image actions are disabled there.
• Several images dropped or pasted at once keep their order.

Related Issue

• Fixes text-editor deletes image embeds — and the table cell or paragraph around them — when saving Markdown #3434