some thinking improvements (#263204)

Author: justschen

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

@@ -709,6 +709,12 @@ export class ChatListItemRenderer extends Disposable implements ITreeRenderer<Ch
 	private renderChatResponseBasic(element: IChatResponseViewModel, index: number, templateData: IChatListItemTemplate) {
 		templateData.rowContainer.classList.toggle('chat-response-loading', (isResponseVM(element) && !element.isComplete));
 
+		if (element.isCanceled && this._currentlyPinnedPart) {
+			this._finishedThinking = true;
+			this._currentlyPinnedPart.stopTimerAndFinalize();
+			this._currentlyPinnedPart = undefined;
+		}
+
 		const content: IChatRendererContent[] = [];
 		const isFiltered = !!element.errorDetails?.responseIsFiltered;
 		if (!isFiltered) {

src/vs/workbench/contrib/chat/browser/media/chat.css

@@ -2606,11 +2606,20 @@ have to be updated for changes to the rules above, or to support more deeply nes
 
 .interactive-session .interactive-response .chat-used-context-list.chat-thinking-items {
 	color: var(--vscode-descriptionForeground);
+	padding-top: 6px;
 }
 
 .interactive-session .interactive-response .value .chat-thinking-box {
 	outline: none;
 
+	.chat-used-context {
+		margin: 0px;
+	}
+
+	.chat-thinking-item {
+		padding: 2px 0px;
+	}
+
 	.chat-thinking-text {
 		font-size: 12px;
 		padding: 3px 10px;