refactor: 优化 MarkdownRenderer 代码格式与注释

src/lib/components/MarkdownRenderer.svelte

@@ -406,21 +406,21 @@
 					codeBlock.classList.remove('is-closed');
 					codeBlock.classList.add('is-open');
 					codeEl.style.maxHeight = 'none';
-					
+
 					const targetHeight = codeEl.scrollHeight;
-					
+
 					// 恢复关闭状态，准备开始动画
 					codeBlock.classList.remove('is-open');
 					codeBlock.classList.add('is-closed');
 					codeEl.style.maxHeight = '0px';
 					void codeEl.offsetHeight; // 强制 reflow
-					
+
 					// 恢复 transition 并开始动画
 					codeEl.style.transition = originalTransition;
 					codeBlock.classList.remove('is-closed');
 					codeBlock.classList.add('is-open');
 					codeEl.style.maxHeight = targetHeight + 'px';
-					
+
 					const handler = (e: Event) => {
 						const transEvent = e as TransitionEvent;
 						if (e.target === codeEl && transEvent.propertyName === 'max-height') {