feat(gateway): add config toggle for chat completions endpoint

src/config/types.ts

@@ -1155,6 +1155,22 @@ export type GatewayReloadConfig = {
   debounceMs?: number;
 };
 
+export type GatewayHttpChatCompletionsConfig = {
+  /**
+   * If false, the Gateway will not serve `POST /v1/chat/completions`.
+   * Default: true when absent.
+   */
+  enabled?: boolean;
+};
+
+export type GatewayHttpEndpointsConfig = {
+  chatCompletions?: GatewayHttpChatCompletionsConfig;
+};
+
+export type GatewayHttpConfig = {
+  endpoints?: GatewayHttpEndpointsConfig;
+};
+
 export type GatewayConfig = {
   /** Single multiplexed port for Gateway WS + HTTP (default: 18789). */
   port?: number;
@@ -1173,6 +1189,7 @@ export type GatewayConfig = {
   tailscale?: GatewayTailscaleConfig;
   remote?: GatewayRemoteConfig;
   reload?: GatewayReloadConfig;
+  http?: GatewayHttpConfig;
 };
 
 export type SkillConfig = {