fix(docs): Show 'Searching sources...' loading state in AI chat

Author: anthonyshew

docs/site/components/geistdocs/message-metadata.tsx

@@ -104,10 +104,15 @@ export const MessageMetadata = ({
   }
 
   if (tool && inProgress) {
+    // Show user-friendly message for search_docs tool
+    const isSearching =
+      tool.type === "tool-invocation" && tool.toolName === "search_docs";
     return (
       <div className="flex items-center gap-2">
         <Spinner />
-        <Shimmer>{tool.type}</Shimmer>
+        <Shimmer>
+          {isSearching ? "Searching sources..." : tool.toolName}
+        </Shimmer>
       </div>
     );
   }