feat: Add "use client" directive to FeedList and EpisodePlayer

frontend/src/components/EpisodePlayer.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import React, { useState } from "react";
+import React, { useEffect, useState } from "react";
 
 interface Episode {
   id: string;

frontend/src/components/FeedList.tsx

@@ -1,5 +1,7 @@
 "use client";
 
+"use client";
+
 import React, { useEffect, useState } from "react";
 
 interface FeedItem {