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

tabatago-swift/TabataGo/Views/Player/PlayerView.swift

@@ -166,6 +166,10 @@ struct PlayerView: View {
             .onReceive(NotificationCenter.default.publisher(for: .skipTrackFromActivity)) { _ in
                 musicVM.skipTrack()
             }
+            .onReceive(NotificationCenter.default.publisher(for: .togglePauseFromActivity)) { _ in
+                print("[PlayerView] Received togglePauseFromActivity notification (fallback)")
+                vm.togglePlayPause()
+            }
             .navigationDestination(isPresented: $vm.isComplete) {
                 CompletionView(session: vm.completedSession, program: program, onDone: { dismiss() })
                     .navigationBarBackButtonHidden()

tabatago-swift/TabataGo/Views/Tabs/HomeTab.swift

@@ -317,5 +317,5 @@ struct ProgramRow: View {
 #Preview {
     HomeTab(previewVM: HomeViewModel(previewPrograms: [PreviewData.sampleProgram]))
         .modelContainer(TabataGoSchema.previewContainer)
-        .environment(AppState())
+        .environment(AppState.shared)
 }

tabatago-swift/TabataGo/Views/Tabs/MainTabView.swift

@@ -48,5 +48,5 @@ struct MainTabView: View {
 #Preview {
     MainTabView()
         .modelContainer(TabataGoSchema.previewContainer)
-        .environment(AppState())
+        .environment(AppState.shared)
 }

tabatago-swift/TabataGo/Views/Tabs/ProfileTab.swift

@@ -139,5 +139,5 @@ struct ProfileRow: View {
 #Preview {
     ProfileTab()
         .modelContainer(TabataGoSchema.previewContainer)
-        .environment(AppState())
+        .environment(AppState.shared)
 }

tabatago-swift/TabataGo/Views/Tabs/ProgramsTab.swift

@@ -103,5 +103,5 @@ struct ProgramsTab: View {
 #Preview {
     ProgramsTab()
         .modelContainer(TabataGoSchema.previewContainer)
-        .environment(AppState())
+        .environment(AppState.shared)
 }