Gateway: add PTT chat + nodes CLI

src/cli/nodes-cli.coverage.test.ts

@@ -251,4 +251,23 @@ describe("nodes-cli coverage", () => {
     });
     expect(invoke?.params?.timeoutMs).toBe(6000);
   });
+
+  it("invokes talk.ptt.once via nodes talk ptt once", async () => {
+    runtimeLogs.length = 0;
+    runtimeErrors.length = 0;
+    callGateway.mockClear();
+    randomIdempotencyKey.mockClear();
+
+    const { registerNodesCli } = await import("./nodes-cli.js");
+    const program = new Command();
+    program.exitOverride();
+    registerNodesCli(program);
+
+    await program.parseAsync(["nodes", "talk", "ptt", "once", "--node", "mac-1"], { from: "user" });
+
+    const invoke = callGateway.mock.calls.find((call) => call[0]?.method === "node.invoke")?.[0];
+    expect(invoke).toBeTruthy();
+    expect(invoke?.params?.command).toBe("talk.ptt.once");
+    expect(invoke?.params?.idempotencyKey).toBe("rk_test");
+  });
 });