fix: use relative API URLs with Next.js proxy

frontend/app/clientActions.ts

@@ -2,8 +2,8 @@
 
 import { VideoData } from './constants';
 
-// Backend API base URL
+// Use relative URLs - Next.js rewrites will proxy to backend
-const API_BASE = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8080/api';
+const API_BASE = '/api';
 
 // Transform backend response to our VideoData format
 function transformVideo(item: any): VideoData {

frontend/next.config.mjs

@@ -14,16 +14,13 @@ const nextConfig = {
         ],
     },
     async rewrites() {
-        const apiBase = process.env.NEXT_PUBLIC_API_URL || 'http://127.0.0.1:8080';
+        // Backend runs on port 8080 inside the container
+        const apiBase = 'http://localhost:8080';
         return [
             {
                 source: '/api/:path*',
                 destination: `${apiBase}/api/:path*`,
             },
-            {
-                source: '/video_proxy',
-                destination: `${apiBase}/video_proxy`,
-            },
         ];
     },
 };