refactor: improve PlaybackModule lifecycle management with onClose

data/playback/src/commonMain/kotlin/bzh/ajaury/chombev/player/di/PlaybackModule.kt

@@ -6,7 +6,10 @@ import org.koin.core.module.Module
 import org.koin.core.module.dsl.bind
 import org.koin.core.module.dsl.singleOf
 import org.koin.dsl.module
+import org.koin.dsl.onClose
 
 val playbackModule: Module = module {
-    singleOf(::PlaybackRepositoryImpl) { bind<PlaybackRepository>() }
+    // Release the audio player when the app is destroyed: closing the composition-scoped Koin drops
+    // this single and fires onClose (only if it was ever created).
+    singleOf(::PlaybackRepositoryImpl) { bind<PlaybackRepository>() } onClose { it?.release() }
 }

shared/src/jvmTest/kotlin/bzh/ajaury/chombev/di/KoinModulesTest.kt

@@ -1,7 +1,6 @@
 package bzh.ajaury.chombev.di
 
 import bzh.ajaury.chombev.appModule
-import bzh.ajaury.chombev.player.di.audioPlayerModule
 import bzh.ajaury.chombev.web.model.WebPage
 import org.koin.core.annotation.KoinExperimentalAPI
 import org.koin.test.verify.verify
@@ -12,7 +11,7 @@ import kotlin.test.Test
  * the build if a dependency cannot be resolved from the declared modules. Acts as a compile-/build-
  * time safety net so DI misconfiguration surfaces in CI rather than at runtime.
  *
- * Uses the JVM platform bindings (the `actual` [audioPlayerModule]); the shared graph is identical
+ * Uses the JVM platform bindings (the `actual` `audioPlayerModule`); the shared graph is identical
  * across targets, so verifying it here covers all of them.
  */
 class KoinModulesTest {