feat: add colour gradients

gradle/libs.versions.toml

@@ -13,6 +13,7 @@ datastore = "1.1.1"              # Jetpack DataStore (persisting connection sett
 media = "1.7.0"                  # MediaSessionCompat: OS media session, notification, cast-style volume
 coil = "3.0.4"                   # Coil: image loading + memory/disk caching for album art
                                  # (pinned to a 3.x that targets compileSdk 35; 3.5 needs 36)
+palette = "1.0.0"                # AndroidX Palette: extract cover-art colours for the bleed effect
 junit = "4.13.2"
 
 [libraries]
@@ -32,6 +33,7 @@ kotlinx-coroutines-android = { group = "org.jetbrains.kotlinx", name = "kotlinx-
 androidx-datastore-preferences = { group = "androidx.datastore", name = "datastore-preferences", version.ref = "datastore" }
 androidx-media = { group = "androidx.media", name = "media", version.ref = "media" }
 coil-compose = { group = "io.coil-kt.coil3", name = "coil-compose", version.ref = "coil" }
+androidx-palette = { group = "androidx.palette", name = "palette-ktx", version.ref = "palette" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
 
 [plugins]