Fix memory leaks, stale game data, and audio volume fluctuation

Memory: clean observers even during PiP, nil player on tile disappear,
track/cancel Werkout monitor tasks, add highlight player cleanup.
Data: add scenePhase-triggered reload on day change, unconditional
10-minute full schedule refresh, keep fast 60s score refresh for live games.
Audio: set mute state before playback starts, use consistent .moviePlayback
mode, add audio session interruption recovery handler.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mlbTVOS/mlbTVOSApp.swift

@@ -4,6 +4,7 @@ import SwiftUI
 @main
 struct mlbTVOSApp: App {
     @State private var viewModel = GamesViewModel()
+    @Environment(\.scenePhase) private var scenePhase
 
     init() {
         configureAudioSession()
@@ -13,6 +14,11 @@ struct mlbTVOSApp: App {
         WindowGroup {
             ContentView()
                 .environment(viewModel)
+                .onChange(of: scenePhase) { _, newPhase in
+                    if newPhase == .active {
+                        Task { await viewModel.refreshIfDayChanged() }
+                    }
+                }
         }
     }
 
@@ -24,5 +30,23 @@ struct mlbTVOSApp: App {
         } catch {
             print("Failed to set audio session: \(error)")
         }
+
+        NotificationCenter.default.addObserver(
+            forName: AVAudioSession.interruptionNotification,
+            object: AVAudioSession.sharedInstance(),
+            queue: .main
+        ) { notification in
+            guard let info = notification.userInfo,
+                  let typeValue = info[AVAudioSessionInterruptionTypeKey] as? UInt,
+                  let type = AVAudioSession.InterruptionType(rawValue: typeValue) else { return }
+
+            if type == .ended {
+                let options = (info[AVAudioSessionInterruptionOptionKey] as? UInt)
+                    .flatMap(AVAudioSession.InterruptionOptions.init) ?? []
+                if options.contains(.shouldResume) {
+                    try? AVAudioSession.sharedInstance().setActive(true)
+                }
+            }
+        }
     }
 }