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* feat(editor): convert over-threshold pastes into a text attachment Pasting more than PASTE_AS_FILE_THRESHOLD (4000) characters into a turn-based composer now uploads a `pasted-text.txt` attachment instead of writing thousands of characters into the body. Opt-in per editor: chat, new comment, reply and comment edit pass the threshold; issue and project descriptions deliberately do not, because there a long paste IS the content. The synthesised File goes through the existing upload pipeline unchanged (nothing in it inspects a File's origin), so draft persistence, status chips and .txt preview all come for free. Recovery is the part that needed real design. A dropped file survives a failed upload on disk; this text exists nowhere else — it was never written into the document and its source tab may be closed. Since uploads outlive their mount (MUL-5181), the editor cannot own that recovery, so useCoordinatedUploads does: deliverPastedTextBack mirrors deliverFinishedUpload (live editor, else the persisted body) and is the single responder, so the live and dead cases can neither both fire nor both be skipped. The text is restored as markdown because markdown-paste is what would have handled it had it never been converted. A paste inside a code block stays inline — opening a fence is the request to show the thing. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> * test(editor): pin the paste handler order against the real extension array Both markdownPaste and fileUpload register catch-all handlePaste handlers, so which one ProseMirror consults first decides whether paste-as-file works at all. That ordering is not visible in either file: Tiptap reverses the extension array before collecting plugins (@tiptap/core `get plugins()`), and neither extension sets a priority, so the array position in createEditorExtensions is the whole contract. The existing tests mounted the fileUpload extension alone and could not see it. This one builds the production array via createEditorExtensions; swapping the two entries makes it fail. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>