feat: Implement Milvus retriver for RAG (#516)

* feat: Implement MilvusRetriever with embedding model and resource management

* chore: Update configuration and loader files for consistency

* chore: Clean up test_milvus.py for improved readability and organization

* feat: Add tests for DashscopeEmbeddings query and document embedding methods

* feat: Add tests for embedding model initialization and example file loading in MilvusProvider

* chore: Remove unused imports and clean up test_milvus.py for better readability

* chore: Clean up test_milvus.py for improved readability and organization

* chore: Clean up test_milvus.py for improved readability and organization

* fix: replace print statements with logging in recursion limit function

* Implement feature X to enhance user experience and optimize performance

* refactor: clean up unused imports and comments in AboutTab component

* Implement feature X to enhance user experience and fix bug Y in module Z

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

web/src/app/chat/components/research-activities-block.tsx

@@ -91,6 +91,9 @@ function ActivityListItem({ messageId }: { messageId: string }) {
   if (message) {
     if (!message.isStreaming && message.toolCalls?.length) {
       for (const toolCall of message.toolCalls) {
+        if (toolCall.result?.startsWith("Error")) {
+          return null;
+        }
         if (toolCall.name === "web_search") {
           return <WebSearchToolCall key={toolCall.id} toolCall={toolCall} />;
         } else if (toolCall.name === "crawl_tool") {
@@ -111,16 +114,16 @@ function ActivityListItem({ messageId }: { messageId: string }) {
 const __pageCache = new LRUCache<string, string>({ max: 100 });
 type SearchResult =
   | {
-      type: "page";
-      title: string;
-      url: string;
-      content: string;
-    }
+    type: "page";
+    title: string;
+    url: string;
+    content: string;
+  }
   | {
-      type: "image";
-      image_url: string;
-      image_description: string;
-    };
+    type: "image";
+    image_url: string;
+    image_description: string;
+  };
 
 function WebSearchToolCall({ toolCall }: { toolCall: ToolCallRuntime }) {
   const t = useTranslations("chat.research");
@@ -317,7 +320,7 @@ function RetrieverToolCall({ toolCall }: { toolCall: ToolCallRuntime }) {
                   />
                 </li>
               ))}
-            {documents.map((doc, i) => (
+            {documents?.map((doc, i) => (
               <motion.li
                 key={`search-result-${i}`}
                 className="text-muted-foreground bg-accent flex max-w-40 gap-2 rounded-md px-2 py-1 text-sm"
@@ -330,7 +333,7 @@ function RetrieverToolCall({ toolCall }: { toolCall: ToolCallRuntime }) {
                 }}
               >
                 <FileText size={32} />
-                {doc.title}
+                {doc.title} (chunk-{i},size-{doc.content.length})
               </motion.li>
             ))}
           </ul>