chore: handle missing client dist path gracefully in server

server/server.js

@@ -4,6 +4,7 @@ import cookieSession from 'cookie-session';
 import dotenv from 'dotenv';
 import axios from 'axios';
 import path from 'path';
+import fs from 'fs';
 import { 
   logChatMessage, 
   logVoiceWords, 
@@ -912,11 +913,24 @@ async function pollTwitchStreamStatus() {
 // Serve static frontend files in production
 if (process.env.NODE_ENV === 'production') {
   const __dirname = new URL('.', import.meta.url).pathname;
-  // Express static client serve
-  app.use(express.static('../client/dist'));
-  app.get('*', (req, res) => {
-    res.sendFile(path.resolve(__dirname, '../client/dist', 'index.html'));
-  });
+  const clientDistPath = path.resolve(__dirname, '../client/dist');
+  
+  if (fs.existsSync(clientDistPath)) {
+    // Express static client serve
+    app.use(express.static(clientDistPath));
+    app.get('*', (req, res) => {
+      res.sendFile(path.resolve(clientDistPath, 'index.html'));
+    });
+  } else {
+    // In decoupled mode (Hugging Face API-only), serve a simple JSON status page on root
+    app.get('/', (req, res) => {
+      res.json({
+        status: 'online',
+        message: 'winx_prinx API Server is running',
+        environment: 'production'
+      });
+    });
+  }
 }
 
 // Start Server