feat: add player screen to TV app via compose navigation

- Add PlayerRoute to the Route sealed interface
- Refactor PlayerViewModel to expose loadMedia() for external callers
- Add onPlay() to EpisodeScreenViewModel and MovieScreenViewModel
- Wire play/resume buttons in TV episode and movie screens
- Create TvPlayerScreen with TV-optimized controls: seek bar, playback
  buttons, track selection panels, queue panel, and state cards
- Register PlayerRoute in TvRouteEntryBuilder and TvNavigationModule
- Add media3-ui dependency to app-tv module

feature/shared/src/main/java/hu/bbara/purefin/feature/shared/content/episode/EpisodeScreenViewModel.kt

@@ -5,6 +5,7 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import hu.bbara.purefin.core.data.MediaRepository
 import hu.bbara.purefin.core.data.navigation.NavigationManager
+import hu.bbara.purefin.core.data.navigation.Route
 import hu.bbara.purefin.core.model.Episode
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
@@ -38,6 +39,11 @@ class EpisodeScreenViewModel @Inject constructor(
         navigationManager.pop()
     }
 
+    fun onPlay() {
+        val id = _episodeId.value?.toString() ?: return
+        navigationManager.navigate(Route.PlayerRoute(mediaId = id))
+    }
+
     fun selectEpisode(seriesId: UUID, seasonId: UUID, episodeId: UUID) {
         _episodeId.value = episodeId
     }

feature/shared/src/main/java/hu/bbara/purefin/feature/shared/content/movie/MovieScreenViewModel.kt

@@ -33,6 +33,10 @@ class MovieScreenViewModel @Inject constructor(
         navigationManager.pop()
     }
 
+    fun onPlay() {
+        val id = _movie.value?.id?.toString() ?: return
+        navigationManager.navigate(Route.PlayerRoute(mediaId = id))
+    }
 
     fun onGoHome() {
         navigationManager.replaceAll(Route.Home)