refactor(gateway): split server helpers

src/gateway/server-browser.ts

@@ -0,0 +1,17 @@
+export type BrowserControlServer = {
+  stop: () => Promise<void>;
+};
+
+export async function startBrowserControlServerIfEnabled(): Promise<
+  BrowserControlServer | null
+> {
+  if (process.env.CLAWDIS_SKIP_BROWSER_CONTROL_SERVER === "1") return null;
+  // Lazy import: keeps startup fast, but still bundles for the embedded
+  // gateway (bun --compile) via the static specifier path.
+  const override = process.env.CLAWDIS_BROWSER_CONTROL_MODULE?.trim();
+  const mod = override
+    ? await import(override)
+    : await import("../browser/server.js");
+  await mod.startBrowserControlServerFromConfig();
+  return { stop: mod.stopBrowserControlServer };
+}