feat: 更新 EpisodeSelector 组件，调整每页显示集数和样式以优化用户体验

src/app/play/page.tsx

@@ -1640,6 +1640,7 @@ function PlayPageClient() {
             >
               <EpisodeSelector
                 totalEpisodes={totalEpisodes}
+                episodesPerPage={50}
                 value={currentEpisodeIndex + 1}
                 onChange={handleEpisodeChange}
                 onSourceChange={handleSourceChange}