fix: complete image_make asset delivery

mindspace-image-generation-routes.test.mjs

@@ -42,7 +42,7 @@ test('image generation route passes authenticated user and idempotency key to th
       purpose: 'hero',
       prompt: 'calm library',
       negativePrompt: undefined,
-      consumerRef: 'mindspace:req-1:hero',
+      consumerRef: 'mindspace:imgreq-1:hero',
       idempotencyKey: 'imgreq-1',
     }]);
   } finally { await fixture.close(); }
@@ -84,11 +84,15 @@ test('internal image generation route requires its injected secret guard and exp
     assert.equal(denied.status, 401);
     const allowed = await fetch(`${fixture.url}/agent/mindspace_image_generate`, {
       method: 'POST',
-      headers: { 'content-type': 'application/json', authorization: 'Bearer internal-secret' },
+      headers: {
+        'content-type': 'application/json',
+        authorization: 'Bearer internal-secret',
+        'idempotency-key': 'page-hero-1',
+      },
       body: JSON.stringify({ user_id: 'user-2', purpose: 'hero', prompt: 'x' }),
     });
     assert.equal(allowed.status, 201);
     assert.equal(calls[0].userId, 'user-2');
-    assert.equal(calls[0].consumerRef, 'mindspace-agent:req-1:hero');
+    assert.equal(calls[0].consumerRef, 'mindspace-agent:page-hero-1:hero');
   } finally { await fixture.close(); }
 });