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/Views/MultiStreamView.swift

@@ -353,6 +353,7 @@ private struct MultiStreamTile: View {
     @State private var hasError = false
     @State private var startupPlaybackTask: Task<Void, Never>?
     @State private var qualityUpgradeTask: Task<Void, Never>?
+    @State private var werkoutMonitorTask: Task<Void, Never>?
     @State private var clipTimeLimitObserver: Any?
     @State private var isAdvancingClip = false
     @StateObject private var playbackDiagnostics = MultiStreamPlaybackDiagnostics()
@@ -447,7 +448,13 @@ private struct MultiStreamTile: View {
             startupPlaybackTask = nil
             qualityUpgradeTask?.cancel()
             qualityUpgradeTask = nil
-            if let player { removeClipTimeLimit(from: player) }
+            werkoutMonitorTask?.cancel()
+            werkoutMonitorTask = nil
+            if let player {
+                removeClipTimeLimit(from: player)
+                player.pause()
+            }
+            player = nil
             playbackDiagnostics.clear(streamID: stream.id, reason: "tile disappeared")
         }
         #if os(tvOS)
@@ -557,7 +564,7 @@ private struct MultiStreamTile: View {
 
         if !Self.audioSessionConfigured {
             do {
-                try AVAudioSession.sharedInstance().setCategory(.playback)
+                try AVAudioSession.sharedInstance().setCategory(.playback, mode: .moviePlayback)
                 try AVAudioSession.sharedInstance().setActive(true)
                 Self.audioSessionConfigured = true
                 logMultiView("startStream audio session configured id=\(stream.id)")
@@ -604,13 +611,14 @@ private struct MultiStreamTile: View {
         avPlayer.currentItem?.preferredForwardBufferDuration = 2
 
         self.player = avPlayer
+        // Set mute state BEFORE playback to prevent audio spikes
+        viewModel.attachPlayer(avPlayer, to: stream.id)
         playbackDiagnostics.attach(
             to: avPlayer,
             streamID: stream.id,
             label: stream.label,
             onPlaybackEnded: playbackEndedHandler(for: avPlayer)
         )
-        viewModel.attachPlayer(avPlayer, to: stream.id)
         scheduleStartupPlaybackRecovery(for: avPlayer)
         scheduleQualityUpgrade(for: avPlayer)
         logMultiView("startStream attached player id=\(stream.id) muted=\(avPlayer.isMuted) startupResolution=\(multiViewStartupResolution) fastStart=true calling playImmediately(atRate: 1.0)")
@@ -851,9 +859,11 @@ private struct MultiStreamTile: View {
         installClipTimeLimit(on: player)
 
         // Monitor for failure and auto-skip to next clip
-        Task { @MainActor in
+        werkoutMonitorTask?.cancel()
+        werkoutMonitorTask = Task { @MainActor in
             for checkDelay in [1.0, 3.0] {
                 try? await Task.sleep(for: .seconds(checkDelay))
+                guard !Task.isCancelled else { return }
                 let postItemStatus = player.currentItem?.status
                 let error = player.currentItem?.error?.localizedDescription ?? "nil"
                 logMultiView(