Multi-file refactorings could drop LSP document versions, overwrite content changed after a preview, or leave earlier files saved after a later write failed. Workspace edits now keep server versions and preview fingerprints, are validated on a staging copy, snapshot disk and open buffers, and roll back on commit failure (retaining recovery files if rollback fails). The whole edit is one Undo/Redo step in editors and in the notification. Version reads and transaction work run off the async workers. Closes#461.
Co-authored-by: shohruh-genius <[email protected]>
Co-Authored-By: Claude Opus 5.5 <[email protected]>
