feat: animated expansion of md-link

src/components/Article.tsx

@@ -7,6 +7,7 @@ export interface ArticleProps {
   section?: string;  // 指定要显示的标题（不含 #）
   onLoaded?: () => void;
   onError?: (error: Error) => void;
+  class?: string;  // 额外的 class 用于样式控制
 }
 
 async function fetchArticleContent(params: { src: string; section?: string }): Promise<string> {
@@ -39,7 +40,7 @@ export const Article: Component<ArticleProps> = (props) => {
   });
 
   return (
-    <article ref={articleRef} class="prose" data-src={props.src}>
+    <article ref={articleRef} class={`prose ${props.class || ''}`} data-src={props.src}>
       <Show when={content.loading}>
         <div class="text-gray-500">加载中...</div>
       </Show>

src/components/md-link.tsx

@@ -8,8 +8,10 @@ customElement("md-link", {}, (props, { element }) => {
   noShadowDOM();
 
   const [showArticle, setShowArticle] = createSignal(false);
+  const [expanded, setExpanded] = createSignal(false);
   let articleContainer: HTMLDivElement | undefined;
   let disposeArticle: (() => void) | null = null;
+  let articleElement: HTMLElement | undefined;
 
   // 从 element 的 textContent 获取链接目标（支持 path#section 语法）
   const rawLinkSrc = element?.textContent?.trim() || "";
@@ -38,14 +40,20 @@ customElement("md-link", {}, (props, { element }) => {
     if (!parentP) return;
 
     if (showArticle()) {
-      // 隐藏文章
+      // 隐藏文章 - 先折叠再移除
+      setExpanded(false);
       if (articleContainer) {
+        articleContainer.style.height = '0';
+        articleContainer.style.opacity = '0';
+        setTimeout(() => {
           if (disposeArticle) {
             disposeArticle();
             disposeArticle = null;
           }
-        articleContainer.remove();
+          articleContainer?.remove();
           articleContainer = undefined;
+          articleElement = undefined;
+        }, 300);
       }
       setShowArticle(false);
     } else {
@@ -53,6 +61,10 @@ customElement("md-link", {}, (props, { element }) => {
       articleContainer = document.createElement("div");
       articleContainer.classList.add("md-link-article");
       articleContainer.classList.add("ml-4", "border-l-2", "border-gray-200", "pl-4");
+      articleContainer.style.height = '0';
+      articleContainer.style.opacity = '0';
+      articleContainer.style.overflow = 'hidden';
+      articleContainer.style.transition = 'height 0.3s ease, opacity 0.3s ease';
       parentP.after(articleContainer);
 
       // 渲染 Article 组件
@@ -60,7 +72,19 @@ customElement("md-link", {}, (props, { element }) => {
         <Article
           src={linkSrc}
           section={section}
-          onLoaded={() => console.log("Article loaded:", linkSrc)}
+          class="article-animate"
+          onLoaded={() => {
+            // 内容加载完成后，获取实际高度并展开
+            requestAnimationFrame(() => {
+              articleElement = articleContainer?.querySelector('article[data-src]');
+              if (articleElement) {
+                const height = articleElement.scrollHeight;
+                articleContainer!.style.height = `${height}px`;
+                articleContainer!.style.opacity = '1';
+                setExpanded(true);
+              }
+            });
+          }}
           onError={(err) => console.error("Article error:", err)}
         />
       ), articleContainer);