fix(agent): strip hallucinated media links from analysis reply

app/(chat)/api/chat/route.ts

@@ -827,9 +827,33 @@ function normalizeAgentReportHeadingLine(line: string): string {
   return line;
 }
 
+function stripAgentFriendlyMediaEmbeds(message: string): string {
+  if (!message) return message;
+
+  const withoutInlineMedia = message
+    .replace(/!\[[^\]]*]\((https?:\/\/[^\s)]+)\)/gi, "")
+    .replace(/<video[\s\S]*?<\/video>/gi, "")
+    .replace(/<img[^>]*>/gi, "");
+
+  const cleanedLines = withoutInlineMedia
+    .split("\n")
+    .filter((line) => {
+      const trimmed = line.trim();
+      if (!trimmed) return true;
+      if (/^https?:\/\/\S+$/i.test(trimmed)) return false;
+      if (/^\[[^\]]*]\(https?:\/\/[^\s)]+\)$/i.test(trimmed)) return false;
+      return true;
+    })
+    .join("\n");
+
+  return cleanedLines.replace(/\n{3,}/g, "\n\n").trim();
+}
+
 function normalizeAgentReportForDisplay(message?: string): string | undefined {
   if (!message?.trim()) return message;
-  return message
+  const stripped = stripAgentFriendlyMediaEmbeds(message);
+  if (!stripped) return undefined;
+  return stripped
     .split("\n")
     .map((line) => normalizeAgentReportHeadingLine(line))
     .join("\n");