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/nextPrev.ts

@@ -0,0 +1,32 @@
+export function getNextIndex(
+  currentIndex: number,
+  total: number,
+  isShuffle: boolean
+) {
+  if (total === 0) return -1;
+
+  if (isShuffle) {
+    return Math.floor(Math.random() * total);
+  }
+
+  return (currentIndex + 1) % total;
+}
+
+export function getPrevIndex(
+  currentIndex: number,
+  total: number,
+  isShuffle: boolean
+) {
+  if (total === 0) return -1;
+
+  if (isShuffle) {
+    return Math.floor(Math.random() * total);
+  }
+
+  return currentIndex - 1 < 0 ? total - 1 : currentIndex - 1;
+}
+
+//pakai di ui
+
+// const next = getNextIndex(currentSongIndex, filteredMusik.length, isShuffle);
+// playSong(next);