feat(web): add Download STIX button to AttackerHeader

decnet_web/src/components/AttackerDetail/sections/AttackerHeader.tsx

@@ -1,7 +1,8 @@
 import React from 'react';
 import { useNavigate } from 'react-router-dom';
-import { Crosshair } from '../../../icons';
+import { Crosshair, Download } from '../../../icons';
 import { Tag } from '../ui';
+import api from '../../../utils/api';
 import type { AttackerData } from '../types';
 
 interface Props {
@@ -12,6 +13,20 @@ interface Props {
  *  The identity badge is click-through to the resolved-actor page. */
 export const AttackerHeader: React.FC<Props> = ({ attacker }) => {
   const navigate = useNavigate();
+
+  const handleStixDownload = async () => {
+    try {
+      const res = await api.get(`/attackers/${attacker.uuid}/export/stix`, { responseType: 'blob' });
+      const href = URL.createObjectURL(res.data);
+      const a = document.createElement('a');
+      a.href = href;
+      a.download = `decnet-attacker-${attacker.uuid.slice(0, 8)}.stix.json`;
+      a.click();
+      URL.revokeObjectURL(href);
+    } catch {
+      // best-effort
+    }
+  };
   return (
     <div style={{ display: 'flex', alignItems: 'center', gap: '16px' }}>
       <Crosshair size={32} className="violet-accent" />
@@ -45,6 +60,16 @@ export const AttackerHeader: React.FC<Props> = ({ attacker }) => {
           IDENTITY · {attacker.identity_id.slice(0, 8)}
         </span>
       )}
+      <button
+        type="button"
+        className="btn"
+        style={{ marginLeft: 'auto' }}
+        title="Download STIX 2.1 bundle for this attacker"
+        onClick={handleStixDownload}
+      >
+        <Download size={12} />
+        <span style={{ marginLeft: 6 }}>STIX</span>
+      </button>
     </div>
   );
 };