fix(baoyu-image-gen): require OpenRouter image parameters

skills/baoyu-image-gen/scripts/providers/openrouter.test.ts

@@ -39,6 +39,9 @@ test("OpenRouter request body uses image_config and string content for text-only
     image_size: "2K",
     aspect_ratio: "16:9",
   });
+  assert.deepEqual(body.provider, {
+    require_parameters: true,
+  });
   assert.equal(body.stream, false);
   assert.equal(body.messages[0].content, "hello");
 });

skills/baoyu-image-gen/scripts/providers/openrouter.ts

@@ -234,6 +234,9 @@ export function buildRequestBody(
     ],
     modalities: ["image", "text"],
     image_config: imageConfig,
+    provider: {
+      require_parameters: true,
+    },
     stream: false,
   };
 }