feat: integrate Convex API and add N5 proxy functionality

- Added Convex client setup in a new module for handling Convex API interactions.
- Implemented N5Proxy to handle requests for the /n5/:slug route, querying Convex for application links.
- Updated app context to include Convex client and API.
- Adjusted routing to support new Convex API endpoints.
- Enhanced error handling for missing applications in the N5 proxy.

src/modules/n5/index.ts

@@ -0,0 +1,31 @@
+import { convex, convexApi } from '@/app.ts';
+import { IncomingMessage, ServerResponse } from 'http';
+
+type ProxyOptions = {
+  createNotFoundPage: (msg?: string) => any;
+};
+// /n5/:slug
+export const N5Proxy = async (req: IncomingMessage, res: ServerResponse, opts?: ProxyOptions) => {
+  const { url } = req;
+  const _url = new URL(url || '', `http://localhost`);
+  const { pathname, searchParams } = _url;
+  let [user, app, userAppKey] = pathname.split('/').slice(1);
+  if (!app) {
+    opts?.createNotFoundPage?.('应用未找到');
+    return false;
+  }
+  const convexResult = await convex.query(convexApi.nCode.getBySlug, { slug: app })
+  if (!convexResult) {
+    opts?.createNotFoundPage?.('应用未找到');
+    return false;
+  }
+  const link = convexResult.data.link;
+  if (!link) {
+    opts?.createNotFoundPage?.('应用未找到');
+    return false;
+  }
+  res.writeHead(302, {
+    Location: link,
+  });
+  res.end();
+};