What it may solve
A draw.io editor as a .drawio file viewer in the DSH sidebar: diagrams are ordinary workspace files (new ones default to docs/diagrams/), edits autosave, and a file changed outside the editor is refused with a conflict bar instead of being overwritten; the editor is downloaded once from a pinned upstream release with a SHA-256 check and then runs fully offline.
Imported third-party catalog description; not a Registry verification conclusion.