chore: add jaad dependency to fix .m4a playback on Desktop

core/audioplayer/build.gradle.kts

@@ -13,6 +13,10 @@ kotlin {
             implementation(libs.media3.exoplayer)
             implementation(libs.media3.common)
         }
+        jvmMain.dependencies {
+            // Desktop audio: AAC/MP4 SPI so javax.sound.sampled can decode .m4a
+            implementation(libs.jaad)
+        }
         // webMain is the js + wasmJs intermediate source set from the default hierarchy template.
         webMain.dependencies {
             // Browser audio (HTMLAudioElement, document) for js + wasmJs

core/audioplayer/src/jvmMain/kotlin/bzh/ajaury/chombev/player/data/JvmAudioPlayer.kt

@@ -17,6 +17,10 @@ import kotlin.time.Duration.Companion.microseconds
 
 /**
  * Desktop [AudioPlayer] backed by [javax.sound.sampled].
+ *
+ * The JDK decodes neither AAC nor its MP4 container, so the `.m4a` recordings are decoded to PCM by
+ * the jaad AAC provider on the classpath, which [AudioSystem] discovers automatically. Loading then
+ * works the same as for any natively supported format.
  */
 internal class JvmAudioPlayer : AudioPlayer {
     private var clip: Clip? = null