File > Close, a file tab's x and File > Close All ran the engine's
close/closeall directly, which drop the drawing. Nothing checked for
unsaved changes on any platform; the web report just made it visible.
- New ui-egui `closing` module: close requests from the UI go through a
queue of drawings (by DocState uid). A dirty drawing is shown and asked
about in an in-app egui modal ("Save changes to X?" Save / Don't Save /
Cancel, Escape = Cancel), the same on desktop and web.
- Save routes to the existing qsave path (picker for untitled drawings)
and closes only if the drawing is really clean afterwards; otherwise it
stays open with its edits and a status message.
- Close All asks per dirty drawing in tab order; Cancel stops it.
- Menu, typed CLOSE/CLOSEALL (null params) and the tab x use the prompt;
JSON calls (engine.execute, control, MCP, scripts) keep discarding
without asking.
- Shortcuts are paused while the prompt is open; ui.inspect reports
`closePrompt`.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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