make the artwork theme transition duration caller-supplied

app/src/main/kotlin/com/subtracks/ui/library/AlbumDetailScreen.kt

@@ -91,6 +91,7 @@ import kotlin.math.roundToInt
 private const val DOT = "\u00B7"
 private const val GRADIENT_SCREENS = 2.0f
 private const val FADE_DISTANCE_DP = 64
+private const val THEME_TRANSITION_MS = 350
 
 @Composable
 fun AlbumDetailRoute(
@@ -107,7 +108,7 @@ fun AlbumDetailRoute(
         album = album,
         songs = songs,
         coverArt = viewModel::coverArt,
-        artwork = rememberArtworkColors(viewModel.coverArt(album?.coverArt, true)),
+        artwork = rememberArtworkColors(viewModel.coverArt(album?.coverArt, true), THEME_TRANSITION_MS),
         onBack = onBack,
         onSongClick = viewModel::play,
         playingSongId = playback.item?.id.takeIf { context?.kind == QueueKind.Album && context.refId == albumId },

app/src/main/kotlin/com/subtracks/ui/theme/AnimatedArtworkColors.kt

@@ -12,7 +12,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.lerp
 
-private const val THEME_TRANSITION_MS = 600
+const val ARTWORK_THEME_TRANSITION_MS = 600
 
 fun baseArtworkColors(): ArtworkColors =
     ArtworkColors(
@@ -25,7 +25,10 @@ fun baseArtworkColors(): ArtworkColors =
     )
 
 @Composable
-fun rememberAnimatedArtworkColors(target: ArtworkColors?): ArtworkColors {
+fun rememberAnimatedArtworkColors(
+    target: ArtworkColors?,
+    durationMillis: Int = ARTWORK_THEME_TRANSITION_MS,
+): ArtworkColors {
     val base = remember { baseArtworkColors() }
     var from by remember { mutableStateOf(target ?: base) }
     var to by remember { mutableStateOf(target ?: base) }
@@ -37,7 +40,7 @@ fun rememberAnimatedArtworkColors(target: ArtworkColors?): ArtworkColors {
             from = to
             to = next
             progress.snapTo(0f)
-            progress.animateTo(1f, tween(durationMillis = THEME_TRANSITION_MS))
+            progress.animateTo(1f, tween(durationMillis = durationMillis))
         }
     }
 

app/src/main/kotlin/com/subtracks/ui/theme/ArtworkTheme.kt

@@ -158,10 +158,13 @@ private fun blendHue(
 }
 
 @Composable
-fun rememberArtworkColors(ref: CoverArtRef?): ArtworkColors {
+fun rememberArtworkColors(
+    ref: CoverArtRef?,
+    durationMillis: Int = ARTWORK_THEME_TRANSITION_MS,
+): ArtworkColors {
     val seeds by rememberArtworkSeed(ref)
     val target = remember(seeds) { seeds?.let { (primary, secondary) -> artworkColorsFromSeeds(primary, secondary) } }
-    return rememberAnimatedArtworkColors(target)
+    return rememberAnimatedArtworkColors(target, durationMillis)
 }
 
 @Composable