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/Components/PitchSequenceView.swift

@@ -0,0 +1,68 @@
+import SwiftUI
+
+struct PitchSequenceView: View {
+    let pitches: [LiveFeedPlayEvent]
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            Text("PITCH SEQUENCE")
+                .font(.system(size: 12, weight: .bold, design: .rounded))
+                .foregroundStyle(.white.opacity(0.5))
+                .kerning(1.2)
+
+            ForEach(Array(pitches.enumerated()), id: \.offset) { index, pitch in
+                HStack(spacing: 10) {
+                    Text("#\(pitch.pitchNumber ?? (index + 1))")
+                        .font(.system(size: 13, weight: .bold, design: .rounded))
+                        .foregroundStyle(.white.opacity(0.5))
+                        .frame(width: 28, alignment: .leading)
+
+                    Text(pitch.pitchTypeDescription)
+                        .font(.system(size: 14, weight: .semibold, design: .rounded))
+                        .foregroundStyle(.white)
+                        .lineLimit(1)
+
+                    Spacer()
+
+                    if let speed = pitch.speedMPH {
+                        Text("\(speed, specifier: "%.1f") mph")
+                            .font(.system(size: 13, weight: .medium).monospacedDigit())
+                            .foregroundStyle(.white.opacity(0.7))
+                    }
+
+                    pitchResultPill(code: pitch.callCode, description: pitch.callDescription)
+                }
+                .padding(.vertical, 4)
+                .padding(.horizontal, 8)
+                .background(
+                    index == pitches.count - 1
+                        ? RoundedRectangle(cornerRadius: 8, style: .continuous).fill(.white.opacity(0.06))
+                        : RoundedRectangle(cornerRadius: 8, style: .continuous).fill(.clear)
+                )
+            }
+        }
+    }
+
+    private func pitchResultPill(code: String, description: String) -> some View {
+        let color = pitchCallColor(code)
+        let label: String
+        switch code {
+        case "B": label = "Ball"
+        case "C": label = "Called Strike"
+        case "S": label = "Swinging Strike"
+        case "F": label = "Foul"
+        case "X": label = "In Play"
+        case "D": label = "In Play (Out)"
+        case "E": label = "In Play (Error)"
+        default: label = description
+        }
+
+        return Text(label)
+            .font(.system(size: 11, weight: .bold, design: .rounded))
+            .foregroundStyle(color)
+            .padding(.horizontal, 8)
+            .padding(.vertical, 4)
+            .background(color.opacity(0.15))
+            .clipShape(Capsule())
+    }
+}