remove code smells for checkpoint rendering in coding agent session (microsoft#258914)

remove code smells

Author: justschen

src/vs/workbench/contrib/chat/browser/chatListRenderer.ts

@@ -555,12 +555,11 @@ export class ChatListItemRenderer extends Disposable implements ITreeRenderer<Ch
 		}
 
 		templateData.checkpointToolbar.context = element;
-		const isLockedToCodingAgent = ChatContextKeys.lockedToCodingAgent.getValue(templateData.contextKeyService);
-		templateData.checkpointContainer.classList.toggle('hidden', isResponseVM(element) || !this.configService.getValue<boolean>(ChatConfiguration.CheckpointsEnabled) || isLockedToCodingAgent);
-
 		const checkpointEnabled = this.configService.getValue<boolean>(ChatConfiguration.CheckpointsEnabled)
 			&& (this.rendererOptions.restorable ?? true);
 
+		templateData.checkpointContainer.classList.toggle('hidden', isResponseVM(element) || !(checkpointEnabled));
+
 		// Only show restore container when we have a checkpoint and not editing
 		const shouldShowRestore = this.viewModel?.model.checkpoint && !this.viewModel?.editing && (index === this.delegate.getListLength() - 1);
 		templateData.checkpointRestoreContainer.classList.toggle('hidden', !(shouldShowRestore && checkpointEnabled));