fix(gateway): unify listen startup log across bind hosts

src/gateway/server-startup-log.test.ts

@@ -42,4 +42,25 @@ describe("gateway startup log", () => {
 
     expect(warn).not.toHaveBeenCalled();
   });
+
+  it("logs all listen endpoints on a single line", () => {
+    const info = vi.fn();
+    const warn = vi.fn();
+
+    logGatewayStartup({
+      cfg: {},
+      bindHost: "127.0.0.1",
+      bindHosts: ["127.0.0.1", "::1"],
+      port: 18789,
+      log: { info, warn },
+      isNixMode: false,
+    });
+
+    const listenMessages = info.mock.calls
+      .map((call) => call[0])
+      .filter((message) => message.startsWith("listening on "));
+    expect(listenMessages).toEqual([
+      `listening on ws://127.0.0.1:18789, ws://[::1]:18789 (PID ${process.pid})`,
+    ]);
+  });
 });