Move the inline ProseMirror comment-mark clear out of the Undo toast's
onClick and into the reopen mutation's onSuccess branch. Clearing it
eagerly flipped the collab mark to unresolved before the reopen result
was known: on a non-404 failure the RQ cache rolls back to resolved but
the doc kept an active highlight the panel treats as resolved, and a
comment refetch can't heal a divergence that lives in the collab doc.
Mirrors the 404 branch's editor-liveness guard/try-catch and the safe
await-then-mark pattern in comment-list-item. The button-triggered
reopen already sets the mark, so the onSuccess call is an idempotent
no-op there.
Tests: reopen failure (500) leaves the mark untouched; null editorRef
on the success path degrades gracefully.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
agent_coder
d36021a111