refactor(musik): integrate music player library functions and fix build errors

- Integrate togglePlayPause, getNextIndex, getPrevIndex, handleRepeatOrNext, seekTo, toggleShuffle, setAudioVolume, toggleMute library functions
- Fix ESLint warnings: remove unused eslint-disable, add missing useEffect dependencies
- Fix ESLint error in useMusicPlayer.ts togglePlayPause function
- Add force-dynamic export to root layout to prevent prerendering errors
- Improve seek slider with preview/commit functionality
- Add isSeeking state to prevent UI flickering during seek

Fixes: Build PageNotFoundError for admin/darmasaba pages

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/app/darmasaba/(pages)/musik/lib/playPause.ts

@@ -0,0 +1,24 @@
+import { RefObject } from "react";
+
+export function togglePlayPause(
+  audioRef: RefObject<HTMLAudioElement | null>,
+  isPlaying: boolean,
+  setIsPlaying: (v: boolean) => void
+) {
+  if (!audioRef.current) return;
+
+  if (isPlaying) {
+    audioRef.current.pause();
+    setIsPlaying(false);
+  } else {
+    audioRef.current
+      .play()
+      .then(() => setIsPlaying(true))
+      .catch(console.error);
+  }
+}
+
+// pakai di ui
+// onClick={() =>
+//   togglePlayPause(audioRef, isPlaying, setIsPlaying)
+// }