Add AI company research workbench backed by the shared site database

apps/docs/src/pages/api/research/ai-companies.ts

@@ -0,0 +1,13 @@
+import type { NextApiRequest, NextApiResponse } from "next";
+import { readResearchSnapshot } from "@/lib/ai-research-store";
+
+// The site's existing proxy protects this endpoint with the same login session.
+export default function handler(request: NextApiRequest, response: NextApiResponse) {
+  response.setHeader("Cache-Control", "private, no-store");
+  if (request.method !== "GET") {
+    response.setHeader("Allow", "GET");
+    return response.status(405).end();
+  }
+  try { return response.status(200).json(readResearchSnapshot()); }
+  catch { return response.status(503).json({ error: "研究数据库暂时不可用，请稍后重试" }); }
+}