fix(server): füge @hono/node-server hinzu und korrigiere Server-Start für Node.js

src/server/index.ts

@@ -62,8 +62,22 @@ const host = process.env.HOST || "0.0.0.0";
 
 console.log(`🚀 Server starting on ${host}:${port}`);
 
-export default {
-  port,
-  hostname: host,
-  fetch: app.fetch,
-};
+// For Bun/Node.js compatibility
+if (typeof Bun !== 'undefined') {
+  // Bun runtime
+  Bun.serve({
+    port,
+    hostname: host,
+    fetch: app.fetch,
+  });
+} else {
+  // Node.js runtime - use Hono's serve function
+  import { serve } from '@hono/node-server';
+  serve({
+    fetch: app.fetch,
+    port,
+    hostname: host,
+  });
+}
+
+export default app;