Fix some issues with restoring focus between pages (#613)

## Description
Yet more focus issue fixes:
- Restore focus when going back to home page from a later row
- Don't jump to episode row when going back to series overview (such as
from a person page)

This PR also changes how backgrounding the app during playback works.
Now the only goes back to the previous page when the app comes back to
the foreground. This helps with focusing back on the page properly.
There's also a bit more clean up performed.

app/src/main/java/com/github/damontecres/wholphin/services/PlaybackLifecycleObserver.kt

@@ -20,6 +20,10 @@ class PlaybackLifecycleObserver
         private var wasPlaying: Boolean? = null
 
         override fun onStart(owner: LifecycleOwner) {
+            val lastDest = navigationManager.backStack.lastOrNull()
+            if (lastDest is Destination.Playback || lastDest is Destination.PlaybackList) {
+                navigationManager.goBack()
+            }
             wasPlaying = null
         }
 
@@ -40,9 +44,6 @@ class PlaybackLifecycleObserver
         }
 
         override fun onStop(owner: LifecycleOwner) {
-            if (navigationManager.backStack.lastOrNull() is Destination.Playback) {
-                navigationManager.goBack()
-            }
             themeSongPlayer.stop()
         }
     }

app/src/main/java/com/github/damontecres/wholphin/ui/Extensions.kt

@@ -28,9 +28,7 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.Density
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
-import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.MutableLiveData
-import androidx.lifecycle.compose.LifecycleEventEffect
 import androidx.media3.common.Player
 import coil3.request.ErrorResult
 import com.github.damontecres.wholphin.data.model.BaseItem
@@ -182,10 +180,10 @@ fun RequestOrRestoreFocus(
             debugKey?.let { Timber.v("RequestOrRestoreFocus: %s", it) }
             focusRequester.tryRequestFocus()
         }
-        LifecycleEventEffect(Lifecycle.Event.ON_RESUME) {
+//        LifecycleEventEffect(Lifecycle.Event.ON_RESUME) {
-            debugKey?.let { Timber.v("RequestOrRestoreFocus onResume: %s", it) }
+//            debugKey?.let { Timber.v("RequestOrRestoreFocus onResume: %s", it) }
-            focusRequester.tryRequestFocus()
+//            focusRequester.tryRequestFocus()
-        }
+//        }
     }
 }
 

app/src/main/java/com/github/damontecres/wholphin/ui/detail/series/SeriesOverview.kt

@@ -21,6 +21,7 @@ import androidx.lifecycle.map
 import com.github.damontecres.wholphin.R
 import com.github.damontecres.wholphin.data.model.BaseItem
 import com.github.damontecres.wholphin.preferences.UserPreferences
+import com.github.damontecres.wholphin.ui.RequestOrRestoreFocus
 import com.github.damontecres.wholphin.ui.components.DialogParams
 import com.github.damontecres.wholphin.ui.components.DialogPopup
 import com.github.damontecres.wholphin.ui.components.ErrorMessage
@@ -37,7 +38,6 @@ import com.github.damontecres.wholphin.ui.detail.buildMoreDialogItems
 import com.github.damontecres.wholphin.ui.nav.Destination
 import com.github.damontecres.wholphin.ui.rememberInt
 import com.github.damontecres.wholphin.ui.seasonEpisode
-import com.github.damontecres.wholphin.ui.tryRequestFocus
 import com.github.damontecres.wholphin.util.LoadingState
 import kotlinx.coroutines.flow.update
 import kotlinx.serialization.Serializable
@@ -158,13 +158,15 @@ fun SeriesOverview(
         LoadingState.Success -> {
             series?.let { series ->
 
-                LaunchedEffect(Unit) {
+                RequestOrRestoreFocus(
                     when (rowFocused) {
-                        EPISODE_ROW -> episodeRowFocusRequester.tryRequestFocus()
+                        EPISODE_ROW -> episodeRowFocusRequester
-                        CAST_AND_CREW_ROW -> castCrewRowFocusRequester.tryRequestFocus()
+                        CAST_AND_CREW_ROW -> castCrewRowFocusRequester
-                        GUEST_STAR_ROW -> guestStarRowFocusRequester.tryRequestFocus()
+                        GUEST_STAR_ROW -> guestStarRowFocusRequester
-                    }
+                        else -> episodeRowFocusRequester
-                }
+                    },
+                    "series_overview",
+                )
                 LifecycleStartEffect(destination.itemId) {
                     viewModel.maybePlayThemeSong(
                         destination.itemId,

app/src/main/java/com/github/damontecres/wholphin/ui/detail/series/SeriesOverviewContent.kt

@@ -49,7 +49,6 @@ import com.github.damontecres.wholphin.data.model.BaseItem
 import com.github.damontecres.wholphin.data.model.Person
 import com.github.damontecres.wholphin.preferences.UserPreferences
 import com.github.damontecres.wholphin.ui.AspectRatios
-import com.github.damontecres.wholphin.ui.RequestOrRestoreFocus
 import com.github.damontecres.wholphin.ui.cards.BannerCard
 import com.github.damontecres.wholphin.ui.cards.PersonRow
 import com.github.damontecres.wholphin.ui.components.ErrorMessage
@@ -182,7 +181,6 @@ fun SeriesOverviewContent(
 
                     is EpisodeList.Success -> {
                         val state = rememberLazyListState(position.episodeRowIndex)
-                        RequestOrRestoreFocus(firstItemFocusRequester)
 
                         LazyRow(
                             state = state,

app/src/main/java/com/github/damontecres/wholphin/ui/main/HomePage.kt

@@ -234,7 +234,7 @@ fun HomePageContent(
 
     val listState = rememberLazyListState()
     val rowFocusRequesters = remember(homeRows.size) { List(homeRows.size) { FocusRequester() } }
-    var focused by remember { mutableStateOf(false) }
+    var focused by rememberSaveable { mutableStateOf(false) }
     LaunchedEffect(homeRows) {
         if (!focused) {
             homeRows
@@ -246,6 +246,8 @@ fun HomePageContent(
                     listState.animateScrollToItem(position.row)
                     focused = true
                 }
+        } else {
+            rowFocusRequesters.getOrNull(position.row)?.tryRequestFocus()
         }
     }
     LaunchedEffect(position) {

app/src/main/java/com/github/damontecres/wholphin/ui/playback/PlaybackViewModel.kt

@@ -157,6 +157,7 @@ class PlaybackViewModel
         internal lateinit var item: BaseItem
         internal var forceTranscoding: Boolean = false
         private var activityListener: TrackActivityPlaybackListener? = null
+        private val jobs = mutableListOf<Job>()
 
         val nextUp = MutableLiveData<BaseItem?>()
         private var isPlaylist = false
@@ -166,20 +167,22 @@ class PlaybackViewModel
         val subtitleSearchLanguage = MutableLiveData<String>(Locale.current.language)
 
         init {
-            viewModelScope.launch(ExceptionHandler()) { controllerViewState.observe() }
-            player.addListener(this)
-            (player as? ExoPlayer)?.addAnalyticsListener(this)
-            addCloseable { player.removeListener(this@PlaybackViewModel) }
-            addCloseable { (player as? ExoPlayer)?.removeAnalyticsListener(this@PlaybackViewModel) }
             addCloseable {
+                player.removeListener(this@PlaybackViewModel)
+                (player as? ExoPlayer)?.removeAnalyticsListener(this@PlaybackViewModel)
+
                 this@PlaybackViewModel.activityListener?.let {
                     it.release()
                     player.removeListener(it)
                 }
+                jobs.forEach { it.cancel() }
+                player.release()
             }
-            addCloseable { player.release() }
+            viewModelScope.launch(ExceptionHandler()) { controllerViewState.observe() }
-            subscribe()
+            player.addListener(this)
-            listenForTranscodeReason()
+            (player as? ExoPlayer)?.addAnalyticsListener(this)
+            jobs.add(subscribe())
+            jobs.add(listenForTranscodeReason())
         }
 
         /**
@@ -874,7 +877,7 @@ class PlaybackViewModel
                 }
         }
 
-        private fun listenForTranscodeReason() {
+        private fun listenForTranscodeReason(): Job =
             viewModelScope.launchIO {
                 currentPlayback.collectLatest {
                     if (it != null) {
@@ -905,7 +908,6 @@ class PlaybackViewModel
                     }
                 }
             }
-        }
 
         private var lastInteractionDate: Date = Date()
 
@@ -1026,11 +1028,13 @@ class PlaybackViewModel
         }
 
         fun release() {
+            Timber.v("release")
             activityListener?.release()
             player.release()
+            activityListener = null
         }
 
-        fun subscribe() {
+        fun subscribe(): Job =
             api.webSocket
                 .subscribe<PlaystateMessage>()
                 .onEach { message ->
@@ -1085,7 +1089,6 @@ class PlaybackViewModel
                         }
                     }
                 }.launchIn(viewModelScope)
-        }
 
         /**
          * Atomically update [currentMediaInfo]