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Suppressing the save dialog made downloads completely silent — "nothing happened" even though the file saved to Downloads. Now on download 'done': (1) tell the web UI → branded toast "Saved X to your Downloads folder" when the window is focused; (2) native OS notification (click → reveal in Explorer) when the app is minimized/in the tray, so it's never double-noticed; (3) a failure notice. preload exposes onDownloadDone; home.html shows the toast. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>