feat: migrate runtime backend to node server

server-node/src/http.ts

@@ -0,0 +1,48 @@
+import type { NextFunction, Request, RequestHandler, Response } from 'express';
+
+export function asyncHandler(
+  handler: (
+    request: Request,
+    response: Response,
+    next: NextFunction,
+  ) => Promise<unknown> | unknown,
+): RequestHandler {
+  return (request, response, next) => {
+    Promise.resolve(handler(request, response, next)).catch(next);
+  };
+}
+
+export function extractApiErrorMessage(
+  rawText: string,
+  fallbackMessage: string,
+) {
+  if (!rawText.trim()) {
+    return fallbackMessage;
+  }
+
+  try {
+    const parsed = JSON.parse(rawText) as {
+      error?: { message?: string };
+      message?: string;
+      code?: string;
+    };
+
+    if (typeof parsed.error?.message === 'string' && parsed.error.message.trim()) {
+      return parsed.error.message.trim();
+    }
+    if (typeof parsed.message === 'string' && parsed.message.trim()) {
+      return parsed.message.trim();
+    }
+    if (typeof parsed.code === 'string' && parsed.code.trim()) {
+      return `${fallbackMessage}（${parsed.code.trim()}）`;
+    }
+  } catch {
+    // Ignore malformed json responses.
+  }
+
+  return rawText.trim() || fallbackMessage;
+}
+
+export function jsonClone<T>(value: T): T {
+  return JSON.parse(JSON.stringify(value)) as T;
+}