feat: enhance search handling to provide user-friendly messages and formatted results

services/router.js

@@ -81,14 +81,29 @@ async function handleSearch(input, intent, config) {
       ? await queryCollectionDataEnhanced(searchParams)
       : await queryCollectionData(searchParams);
 
+    const documents = results.ids?.[0] || [];
+    const contents = results.documents?.[0] || [];
+    const metadatas = results.metadatas?.[0] || [];
+
+    if (documents.length === 0) {
+      return {
+        intent: "search",
+        query: input,
+        answer: "No matching knowledge found. Please curate relevant documentation first.",
+      };
+    }
+
+    const answer = contents
+      .map((content, idx) => {
+        const meta = metadatas[idx] || {};
+        return `**${meta.title || documents[idx]}** (${meta.topic || "general"})\n${content}`;
+      })
+      .join("\n\n---\n\n");
+
     return {
       intent: "search",
       query: input,
-      searchStrategy: {
-        enhanced: searchParams.enhanced,
-        rerank: searchParams.rerank,
-      },
-      results,
+      answer,
     };
   } catch (error) {
     return {