feat: redesign Dynamic Island with phase-driven UI and animations

tabatago-swift/TabataGo/ViewModels/MusicPlayerViewModel.swift

@@ -57,6 +57,8 @@ final class MusicPlayerViewModel: ObservableObject {
 
     func play() {
         guard audio.isMusicEnabled, player != nil else { return }
+        // Reactivate the audio session in case the system deactivated it while backgrounded
+        try? AVAudioSession.sharedInstance().setActive(true)
         player?.volume = audio.musicVolume
         player?.play()
     }

tabatago-swift/TabataGo/ViewModels/PlayerViewModel.swift

@@ -58,6 +58,8 @@ final class PlayerViewModel: ObservableObject {
     private var warmupIndex: Int = 0
     // Cooldown phase index
     private var cooldownIndex: Int = 0
+    // Throttle rapid toggle from widget
+    private var lastToggleTimestamp: Date = .distantPast
 
     private var currentBlock: TabataBlock? {
         guard currentBlockIndex < program.blocks.count else { return nil }
@@ -91,6 +93,14 @@ final class PlayerViewModel: ObservableObject {
     // ─── Controls ─────────────────────────────────────────────────
 
     func togglePlayPause() {
+        let now = Date()
+        guard now.timeIntervalSince(lastToggleTimestamp) > 0.6 else {
+            print("[PlayerVM] TogglePlayPause throttled (last tap was < 0.6s ago)")
+            return
+        }
+        lastToggleTimestamp = now
+        print("[PlayerVM] TogglePlayPause — isPaused=\(isPaused), isRunning=\(isRunning)")
+
         if !isRunning {
             startWorkout()
         } else if isPaused {
@@ -384,7 +394,11 @@ final class PlayerViewModel: ObservableObject {
             trackTitle: currentTrackTitle,
             trackArtist: currentTrackArtist,
             isPlaying: isPlayingMusic,
-            isPaused: isPaused
+            isPaused: isPaused,
+            blockIndex: currentBlockIndex + 1,
+            blockCount: program.blocks.count,
+            exerciseShortName: String(currentExercise?.nameEn.prefix(8) ?? ""),
+            phaseElapsedSeconds: max(0, Double(totalPhaseTime) - Double(timeRemaining))
         )
 
         if let existing = workoutActivity, existing.activityState != .active {
@@ -452,7 +466,11 @@ final class PlayerViewModel: ObservableObject {
             trackTitle: safeActivity.content.state.trackTitle,
             trackArtist: safeActivity.content.state.trackArtist,
             isPlaying: false,
-            isPaused: false
+            isPaused: false,
+            blockIndex: safeActivity.content.state.blockIndex,
+            blockCount: safeActivity.content.state.blockCount,
+            exerciseShortName: safeActivity.content.state.exerciseShortName,
+            phaseElapsedSeconds: safeActivity.content.state.phaseElapsedSeconds
         )
         await safeActivity.end(ActivityContent(state: finalState, staleDate: nil), dismissalPolicy: .immediate)
     }