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/Services/MLBStatsAPI.swift

@@ -42,6 +42,10 @@ actor MLBStatsAPI {
         try await fetchJSON("\(baseURL).1/game/\(gamePk)/feed/live")
     }
 
+    func fetchWinProbability(gamePk: String) async throws -> [WinProbabilityEntry] {
+        try await fetchJSON("\(baseURL).1/game/\(gamePk)/winProbability")
+    }
+
     func fetchLeagueTeams(season: String) async throws -> [LeagueTeamSummary] {
         let response: TeamsResponse = try await fetchJSON(
             "\(baseURL)/teams?sportId=1&season=\(season)&hydrate=league,division,venue,record"
@@ -828,6 +832,19 @@ struct LiveGameFeed: Codable, Sendable {
     var homeLineup: [LiveFeedBoxscorePlayer] {
         liveData.boxscore?.teams?.home.lineupPlayers ?? []
     }
+
+    var currentAtBatPitches: [LiveFeedPlayEvent] {
+        currentPlay?.pitches ?? []
+    }
+
+    var allGameHits: [(play: LiveFeedPlay, hitData: LiveFeedHitData)] {
+        liveData.plays.allPlays.compactMap { play in
+            guard let lastEvent = play.playEvents?.last,
+                  let hitData = lastEvent.hitData,
+                  hitData.coordinates?.coordX != nil else { return nil }
+            return (play: play, hitData: hitData)
+        }
+    }
 }
 
 struct LiveFeedMetaData: Codable, Sendable {
@@ -890,7 +907,7 @@ struct LiveFeedVenue: Codable, Sendable {
 
 struct LiveFeedWeather: Codable, Sendable {
     let condition: String?
-    let temp: Int?
+    let temp: String?
     let wind: String?
 }
 
@@ -911,6 +928,11 @@ struct LiveFeedPlay: Codable, Sendable, Identifiable {
     let about: LiveFeedPlayAbout?
     let count: LiveFeedPlayCount?
     let matchup: LiveFeedPlayMatchup?
+    let playEvents: [LiveFeedPlayEvent]?
+
+    var pitches: [LiveFeedPlayEvent] {
+        playEvents?.filter { $0.isPitch == true } ?? []
+    }
 
     var id: String {
         let inning = about?.inning ?? -1
@@ -958,6 +980,11 @@ struct LiveFeedPlayerReference: Codable, Sendable, Identifiable {
     var displayName: String {
         fullName ?? "TBD"
     }
+
+    var headshotURL: URL? {
+        guard let id else { return nil }
+        return URL(string: "https://img.mlbstatic.com/mlb-photos/image/upload/w_213,q_auto:best/v1/people/\(id)/headshot/67/current")
+    }
 }
 
 struct LiveFeedLinescore: Codable, Sendable {
@@ -1054,3 +1081,87 @@ struct LiveFeedDecisions: Codable, Sendable {
     let loser: LiveFeedPlayerReference?
     let save: LiveFeedPlayerReference?
 }
+
+// MARK: - Play Event / Pitch Data Models
+
+struct LiveFeedPlayEvent: Codable, Sendable, Identifiable {
+    let details: LiveFeedPlayEventDetails?
+    let count: LiveFeedPlayCount?
+    let pitchData: LiveFeedPitchData?
+    let hitData: LiveFeedHitData?
+    let isPitch: Bool?
+    let pitchNumber: Int?
+    let index: Int?
+
+    var id: Int { index ?? pitchNumber ?? 0 }
+
+    var callCode: String {
+        details?.call?.code ?? ""
+    }
+
+    var callDescription: String {
+        details?.call?.description ?? details?.description ?? ""
+    }
+
+    var pitchTypeDescription: String {
+        details?.type?.description ?? "Unknown"
+    }
+
+    var pitchTypeCode: String {
+        details?.type?.code ?? ""
+    }
+
+    var speedMPH: Double? {
+        pitchData?.startSpeed
+    }
+}
+
+struct LiveFeedPlayEventDetails: Codable, Sendable {
+    let call: LiveFeedCallInfo?
+    let description: String?
+    let type: LiveFeedPitchType?
+}
+
+struct LiveFeedCallInfo: Codable, Sendable {
+    let code: String?
+    let description: String?
+}
+
+struct LiveFeedPitchType: Codable, Sendable {
+    let code: String?
+    let description: String?
+}
+
+struct LiveFeedPitchData: Codable, Sendable {
+    let startSpeed: Double?
+    let endSpeed: Double?
+    let strikeZoneTop: Double?
+    let strikeZoneBottom: Double?
+    let coordinates: LiveFeedPitchCoordinates?
+    let zone: Int?
+}
+
+struct LiveFeedPitchCoordinates: Codable, Sendable {
+    let pX: Double?
+    let pZ: Double?
+}
+
+struct LiveFeedHitData: Codable, Sendable {
+    let launchSpeed: Double?
+    let launchAngle: Double?
+    let totalDistance: Double?
+    let coordinates: LiveFeedHitCoordinates?
+}
+
+struct LiveFeedHitCoordinates: Codable, Sendable {
+    let coordX: Double?
+    let coordY: Double?
+}
+
+// MARK: - Win Probability
+
+struct WinProbabilityEntry: Codable, Sendable {
+    let atBatIndex: Int?
+    let homeTeamWinProbability: Double?
+    let awayTeamWinProbability: Double?
+}