fix: a renderer isExternal var, remove redundant casts, add li comments

components/markdown-content.tsx

@@ -215,11 +215,13 @@ const components: Components = {
     const firstHast = node?.children?.[0];
     const isKeyValue =
       firstHast?.type === "element" &&
-      (firstHast as Element).tagName === "strong";
+      firstHast.tagName === "strong";
 
     if (isKeyValue) {
-      const keyText = extractHastText(firstHast as Element);
+      const keyText = extractHastText(firstHast);
-      // Skip the first rendered child (the <strong>) — we replace it with KeyBadge.
+      // Skip index 0 (the rendered <strong> element) — works because react-markdown
+      // emits strong as child[0] for tight lists with the `- **Key:** value` pattern.
+      // Tight lists only: loose lists wrap content in <p>, changing the HAST structure.
       const rest = React.Children.toArray(children).slice(1);
       return (
         <li
@@ -253,11 +255,13 @@ const components: Components = {
     );
   },
 
-  a: ({ href, children }) => (
+  a: ({ href, children }) => {
+    const isExternal = !!href && /^https?:\/\//.test(href);
+    return (
       <a
         href={href}
-      target={href && /^https?:\/\//.test(href) ? "_blank" : undefined}
+        target={isExternal ? "_blank" : undefined}
-      rel={href && /^https?:\/\//.test(href) ? "noopener noreferrer" : undefined}
+        rel={isExternal ? "noopener noreferrer" : undefined}
         style={{
           background: "linear-gradient(90deg, #facc15, #60a5fa)",
           WebkitBackgroundClip: "text",
@@ -271,7 +275,8 @@ const components: Components = {
       >
         {children}
       </a>
-  ),
+    );
+  },
 
   strong: ({ children }) => (
     <strong style={{ color: "#fde68a", fontWeight: 700 }}>{children}</strong>