smooth the warm damping so switching artwork does not flash

app/src/test/kotlin/com/subtracks/ui/theme/ArtworkColorsTest.kt

@@ -60,11 +60,9 @@ class ArtworkColorsTest {
     }
 
     @Test
-    fun warmArtworkLiftsPlayerSurfaceToTheBrightGradientTone() {
+    fun warmArtworkKeepsThePlayerSurfaceDark() {
         val warm = artworkColorsFromSeed(0xFFE6C822.toInt())
-        val cool = artworkColorsFromSeed(0xFF3A7BD5.toInt())
-        assertEquals(warm.gradientHigh, playerSurfaceColor(warm))
-        assertTrue(playerSurfaceColor(cool) != cool.gradientHigh)
+        assertTrue(playerSurfaceColor(warm).luminance() < 0.1f)
     }
 
     private fun contrast(