fix: release MediaSession immediately on playback stop to clear system control card

app/src/main/java/com/antoniegil/astronia/player/PlaybackService.kt

@@ -61,8 +61,29 @@ class PlaybackService : MediaSessionService() {
                     startForeground(NOTIFICATION_ID, createNotification())
                 } else {
                     stopForeground(STOP_FOREGROUND_DETACH)
+                    mediaSession?.let {
+                        it.release()
+                        mediaSession = null
+                        
+                        val notificationManager = getSystemService(NotificationManager::class.java)
+                        notificationManager?.cancel(NOTIFICATION_ID)
+                    }
                 }
             }
+            
+            override fun onPlaybackStateChanged(playbackState: Int) {
+                when (playbackState) {
+                    Player.STATE_ENDED, Player.STATE_IDLE -> {
+                        if (!player.isPlaying) {
+                            stopSelfAndCleanup()
+                        }
+                    }
+                }
+            }
+            
+            override fun onPlayerError(error: androidx.media3.common.PlaybackException) {
+                stopSelfAndCleanup()
+            }
         })
         
         if (player.isPlaying) {
@@ -106,10 +127,27 @@ class PlaybackService : MediaSessionService() {
         return mediaSession
     }
     
-    override fun onDestroy() {
-        mediaSession?.release()
-        mediaSession = null
+    private fun stopSelfAndCleanup() {
+        mediaSession?.let {
+            it.release()
+            mediaSession = null
+        }
         currentPlayer = null
+        
+        val notificationManager = getSystemService(NotificationManager::class.java)
+        notificationManager?.cancel(NOTIFICATION_ID)
+        
+        stopForeground(STOP_FOREGROUND_REMOVE)
+        stopSelf()
+    }
+    
+    override fun onDestroy() {
+        stopSelfAndCleanup()
         super.onDestroy()
     }
+    
+    override fun onTaskRemoved(rootIntent: Intent?) {
+        super.onTaskRemoved(rootIntent)
+        stopSelfAndCleanup()
+    }
 }

app/src/main/java/com/antoniegil/astronia/ui/component/ChannelList.kt

@@ -2,15 +2,12 @@ package com.antoniegil.astronia.ui.component
 
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.BorderStroke
-import androidx.compose.foundation.Canvas
-import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.LazyRow
 import androidx.compose.foundation.lazy.items
-import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.PlayArrow
@@ -23,19 +20,14 @@ import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clipToBounds
-import androidx.compose.ui.geometry.Offset
-import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.antoniegil.astronia.R
 import com.antoniegil.astronia.ui.common.HapticFeedback.slightHapticFeedback
 import com.antoniegil.astronia.util.M3U8Channel
 import kotlinx.coroutines.launch
-import java.text.SimpleDateFormat
-import java.util.Date
 
 @Composable
 fun ChannelListSection(