Kopirovat celu URL linku na hru namiesto holeho gid v Lobby

TASKS.md: uloha presunuta z Nedokoncene do Hotovo.

frontend/src/pages/Lobby.tsx

@@ -17,7 +17,7 @@ export default function Lobby() {
   const handleLeave = () => leaveGame(navigate);
 
   const handleCopyCode = () => {
-    if (gid) navigator.clipboard.writeText(gid);
+    if (gid) navigator.clipboard.writeText(`${window.location.origin}/lobby/${gid}`);
   };
 
   return (