fix thinking header (#267293)

* remove \n\n from header regex check

* fix in chat contribution

Author: justschen

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

@@ -638,7 +638,7 @@ configurationRegistry.registerConfiguration({
 		},
 		[ChatConfiguration.ThinkingStyle]: {
 			type: 'string',
-			default: 'collapsedPreview',
+			default: 'collapsed',
 			enum: ['collapsed', 'collapsedPreview', 'expanded', 'none'],
 			enumDescriptions: [
 				nls.localize('chat.agent.thinkingMode.collapsed', "Thinking parts will be collapsed by default."),

src/vs/workbench/contrib/chat/browser/chatContentParts/chatThinkingContentPart.ts

@@ -21,7 +21,7 @@ function extractTextFromPart(content: IChatThinkingPart): string {
 }
 
 function extractTitleFromThinkingContent(content: string): string | undefined {
-	const headerMatch = content.match(/^\*\*([^*]+)\*\*\s*\n\n/);
+	const headerMatch = content.match(/^\*\*([^*]+)\*\*\s*/);
 	return headerMatch ? headerMatch[1].trim() : undefined;
 }