feat(api): complete phase 9 mobile contracts

server/api/v1/responses.ts

@@ -0,0 +1,24 @@
+import "server-only";
+
+import type { NextResponse } from "next/server";
+import { apiError, apiSuccess } from "../responses";
+import { NETA_API_VERSION } from "./contracts";
+
+export function apiV1Success<T>(
+  data: T,
+  init?: ResponseInit,
+): NextResponse {
+  return withV1Headers(apiSuccess(data, init));
+}
+
+export function apiV1Error(error: unknown): NextResponse {
+  return withV1Headers(apiError(error));
+}
+
+function withV1Headers(response: NextResponse): NextResponse {
+  response.headers.set("X-Neta-API-Version", NETA_API_VERSION);
+  if (!response.headers.has("Cache-Control")) {
+    response.headers.set("Cache-Control", "private, no-store");
+  }
+  return response;
+}