Add game center, per-model shuffle, audio focus fixes, README, tests

- README.md with build/architecture overview
- Game Center screen with at-bat timeline, pitch sequence, spray chart,
  and strike zone component views
- VideoShuffle service: per-model bucketed random selection with
  no-back-to-back guarantee; replaces flat shuffle-bag approach
- Refresh JWT token for authenticated NSFW feed; add josie-hamming-2
  and dani-speegle-2 to the user list
- MultiStreamView audio focus: remove redundant isMuted writes during
  startStream and playNextWerkoutClip so audio stops ducking during
  clip transitions; gate AVAudioSession.setCategory(.playback) behind
  a one-shot flag
- GamesViewModel.attachPlayer: skip mute recalculation when the same
  player is re-attached (prevents toggle flicker on item replace)
- mlbTVOSTests target wired through project.yml with
  GENERATE_INFOPLIST_FILE; VideoShuffleTests covers groupByModel,
  pickRandomFromBuckets, real-distribution no-back-to-back invariant,
  and uniform model distribution over 6000 picks

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

mlbTVOS/Views/DashboardView.swift

@@ -12,8 +12,8 @@ enum SpecialPlaybackChannelConfig {
     static let werkoutNSFWStreamID = "WKNSFW"
     static let werkoutNSFWTitle = "Werkout NSFW"
     static let werkoutNSFWSubtitle = "Authenticated OF media feed"
-    static let werkoutNSFWFeedURLString = "https://ofapp.treytartt.com/api/media?users=tabatachang,werkout&type=video"
-    static let werkoutNSFWCookie = "ofapp_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOjEsImlhdCI6MTc3NDY0MjEyNiwiZXhwIjoxNzc1MjQ2OTI2fQ.rDvZzLQ70MM9drHwA8hRxmqcTTgBGBHXxv1Cc55HSqc"
+    static let werkoutNSFWFeedURLString = "https://ofapp.treytartt.com/api/media?users=tabatachang,werkout,kayla-lauren,ray-mattos,josie-hamming-2,dani-speegle-2&type=video"
+    static let werkoutNSFWCookie = "ofapp_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOjEsImlhdCI6MTc3NDY0MjEyNiwiZXhwIjoxNzc3MjM0MTI2fQ.RdYGvyBPbR6tmK0kaEVhSnIVW6TZlm3Ef42Lxpvl_oQ"
     static let werkoutNSFWTeamCode = "WK"
 
     static var werkoutNSFWHeaders: [String: String] {
@@ -56,6 +56,7 @@ struct DashboardView: View {
     @State private var pendingFullScreenBroadcast: BroadcastSelection?
     @State private var showMLBNetworkSheet = false
     @State private var showWerkoutNSFWSheet = false
+    @State private var isPiPActive = false
 
     private var horizontalPadding: CGFloat {
         #if os(iOS)
@@ -218,7 +219,11 @@ struct DashboardView: View {
                 await resolveFullScreenSource(for: selection)
             },
             resolveNextSource: nextFullScreenSourceResolver(for: selection),
-            tickerGames: tickerGames(for: selection)
+            tickerGames: tickerGames(for: selection),
+            game: selection.game,
+            onPiPActiveChanged: { active in
+                isPiPActive = active
+            }
         )
         .ignoresSafeArea()
         .onAppear {