feat: add image generation tool and WebUI mode

Co-authored-by: Cursor <cursoragent@cursor.com>

webui/src/tests/nanobot-client.test.ts

@@ -120,6 +120,33 @@ describe("NanobotClient", () => {
     );
   });
 
+  it("includes image generation options in outbound messages", () => {
+    const client = new NanobotClient({
+      url: "ws://test",
+      reconnect: false,
+      socketFactory: (url) => new FakeSocket(url) as unknown as WebSocket,
+    });
+    client.connect();
+    lastSocket().fakeOpen();
+
+    client.sendMessage(
+      "chat-img",
+      "draw a banner",
+      undefined,
+      { imageGeneration: { enabled: true, aspect_ratio: "16:9" } },
+    );
+
+    expect(lastSocket().sent).toContain(
+      JSON.stringify({
+        type: "message",
+        chat_id: "chat-img",
+        content: "draw a banner",
+        image_generation: { enabled: true, aspect_ratio: "16:9" },
+        webui: true,
+      }),
+    );
+  });
+
   it("re-attaches known chats after a reconnect", async () => {
     const client = new NanobotClient({
       url: "ws://test",