Fix import.meta.env error: use relative API URL

The bundler doesn't process import.meta.env, use relative URL instead

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

src/api/client.ts

@@ -1,9 +1,8 @@
 import axios from 'axios'
 
 // Determine API URL based on environment
-const API_URL = import.meta.env.PROD
-  ? 'https://api.fuq.tv/api'
-  : 'http://localhost:3000/api'
+// In browser, we use relative URLs which will be proxied by the frontend server
+const API_URL = '/api'
 
 // Create axios instance with default config
 export const apiClient = axios.create({