Remove Hugging Face Spaces base prefix for API routes

frontend/src/api/client.js

@@ -1,14 +1,4 @@
-const BASE = (() => {
-  if (typeof window === 'undefined') return ''
-  const pathname = window.location.pathname
-  if (pathname.startsWith('/spaces/')) {
-    const parts = pathname.split('/').filter(Boolean)
-    if (parts.length >= 3) {
-      return `/${parts.slice(0, 3).join('/')}`
-    }
-  }
-  return ''
-})()
+const BASE = ''
 
 async function request(path, options = {}) {
   const url = path.startsWith('/') ? `${BASE}${path}` : `${BASE}/${path}`