Refactor API hooks to remove infinite query support and update API client base URL

- Removed infinite query options and related functions from Trading212, User Registration, and User API files.
- Updated API client base URLs in privateClient.ts and publicClient.ts to use environment variable for backend URL.
- Refactored Downloader component to directly call API functions for video info retrieval instead of using a hook.

frontend/src/pages/downloader/Downloader.tsx

@@ -1,25 +1,36 @@
 import { useState } from 'react';
-import { useApiDownloaderDownloadRetrieve } from '@/api/generated/public/downloader';
+import { apiDownloaderDownloadRetrieve, apiDownloaderDownloadCreate } from '@/api/generated/public/downloader';
+import { type VideoInfoResponse } from '@/api/generated/public/models';
+
 
 export default function Downloader() {
   const [videoUrl, setVideoUrl] = useState('');
+  const [videoInfo, setVideoInfo] = useState<null | VideoInfoResponse>(null);
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<null | { error: string }>(null);
 
-  // The hook needs: (params, options)
-  // params = { url: string }
-  // options = { query: { enabled: boolean } }
-  const { data: videoInfo, isLoading, error } = useApiDownloaderDownloadRetrieve(
-    { url: videoUrl },  // 1st arg: parameters
-    {
-      query: {
-        enabled: videoUrl.length > 10,  // 2nd arg: query options (only fetch when URL is valid)
-      }
+  async function retriveVideoInfo() {
+    setIsLoading(true);
+    setError(null);
+    try {
+      const info = await apiDownloaderDownloadRetrieve({ url: videoUrl });
+      setVideoInfo(info);
+    } catch (err: any) {
+      setError({ error: err.message || 'Failed to retrieve video info' });
+    } finally {
+      setIsLoading(false);
     }
-  );
+
+    console.log('Retrieving video info for URL:', videoUrl);
+    console.log('Retrieved video info:', videoInfo);
+
+  }
+
 
   return (
     <div className="p-6">
       <h1 className="text-2xl font-bold mb-4">Video Downloader</h1>
-      
+
       <input
         type="text"
         value={videoUrl}
@@ -28,6 +39,8 @@ export default function Downloader() {
         className="w-full p-2 border rounded mb-4"
       />
 
+      <button onClick={retriveVideoInfo}>Retrieve options</button>
+
       {isLoading && <p>Loading video info...</p>}
       
       {error && <p className="text-red-500">Error: {error?.error}</p>}