fix: remove chat edits file suggestions when working set is emptied (microsoft#235433)

Author: joyceerhl

src/vs/workbench/contrib/chat/browser/chatEditing/chatEditingActions.ts

@@ -109,6 +109,13 @@ registerAction2(class RemoveFileFromWorkingSet extends WorkingSetAction {
 		for (const uri of uris) {
 			chatWidget.attachmentModel.delete(uri.toString());
 		}
+
+		// If there are now only suggested files in the working set, also clear those
+		const entries = [...currentEditingSession.workingSet.entries()];
+		const suggestedFiles = entries.filter(([_, state]) => state.state === WorkingSetEntryState.Suggested);
+		if (suggestedFiles.length === entries.length && !chatWidget.attachmentModel.attachments.find((v) => v.isFile && URI.isUri(v.value))) {
+			currentEditingSession.remove(WorkingSetEntryRemovalReason.Programmatic, ...entries.map(([uri,]) => uri));
+		}
 	}
 });