fix(lyrics): lift timed words together

lib/utils/synced_lyrics_scroll.dart

@@ -89,7 +89,6 @@ double syncedLyricSegmentLift({
   required Duration position,
   required Duration start,
   required Duration end,
-  double progressOffset = 0,
 }) {
   if (end <= start) return 0;
   final elapsed = (position - start).inMicroseconds / 1000;
@@ -102,15 +101,11 @@ double syncedLyricSegmentLift({
   // Start gently before the color sweep and let the movement trail it. Keep
   // this envelope independent of word length: fast syllables must not snap
   // upwards just because their highlight finishes in a few frames.
-  // Each grapheme begins as the sweep approaches its own position. Retain the
-  // full word's held-note envelope rather than treating letters as syllables.
-  final offset = duration * progressOffset.clamp(0.0, 1.0);
-  final normalLift = ease((elapsed - offset + 180) / 720);
+  // The whole timed word shares this movement, independent of the color sweep.
+  final normalLift = ease((elapsed + 180) / 720);
   final heldStrength = ((duration - 1000) / 1500).clamp(0.0, 1.0);
   if (heldStrength == 0) return normalLift;
   final rise = ease((elapsed - 400) / math.min(1200, (duration - 400) * 0.6));
   final settle = ease((duration - elapsed) / 600);
-  final wordLift = ease((elapsed + 180) / 720);
-  final emphasis = wordLift > 0 ? normalLift / wordLift : 0;
-  return normalLift + 1.3 * heldStrength * rise * settle * emphasis;
+  return normalLift + 1.3 * heldStrength * rise * settle;
 }