Clarify media service wiring to follow clean/old architecture

androidApp/src/main/AndroidManifest.xml

@@ -172,8 +172,9 @@
                 android:name="autoStoreLocales"
                 android:value="true" />
         </service>
+        <!-- Keep media service implementation in the media module (clean/old architecture). -->
         <service
-            android:name="com.maxrave.media3.service.SimpleMediaService"
+            android:name=".service.SimpMusicMediaService"
             android:exported="true"
             android:foregroundServiceType="mediaPlayback"
             android:stopWithTask="false"

androidApp/src/main/java/com/maxrave/simpmusic/service/SimpMusicMediaService.kt

@@ -0,0 +1,27 @@
+package com.maxrave.simpmusic.service
+
+import androidx.media3.common.Player
+import androidx.media3.session.MediaSession
+import com.maxrave.media3.service.SimpleMediaService
+
+/**
+ * Keep media controls visible while paused by continuing to request notification updates
+ * whenever there is an active queue item.
+ */
+class SimpMusicMediaService : SimpleMediaService() {
+    override fun onUpdateNotification(
+        session: MediaSession,
+        startInForegroundRequired: Boolean,
+    ) {
+        val player = session.player
+        val shouldKeepVisibleWhenPaused =
+            player.currentMediaItem != null &&
+                player.playbackState != Player.STATE_IDLE &&
+                player.playbackState != Player.STATE_ENDED
+
+        super.onUpdateNotification(
+            session,
+            startInForegroundRequired = startInForegroundRequired || shouldKeepVisibleWhenPaused,
+        )
+    }
+}