Wrap widget extension LiveActivity files with os(iOS) guard

HADynamicIslandView, HALockScreenView, and HALiveActivityConfiguration
all import ActivityKit directly. Wrap each file in
#if os(iOS) && !targetEnvironment(macCatalyst).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: rwarner

Sources/Extensions/Widgets/LiveActivity/HADynamicIslandView.swift

@@ -1,3 +1,4 @@
+#if os(iOS) && !targetEnvironment(macCatalyst)
 import ActivityKit
 import Shared
 import SwiftUI
@@ -161,3 +162,4 @@ struct HAExpandedBottomView: View {
         return .haPrimary
     }
 }
+#endif

Sources/Extensions/Widgets/LiveActivity/HALiveActivityConfiguration.swift

@@ -1,3 +1,4 @@
+#if os(iOS) && !targetEnvironment(macCatalyst)
 import ActivityKit
 import Shared
 import SwiftUI
@@ -21,3 +22,4 @@ struct HALiveActivityConfiguration: Widget {
         }
     }
 }
+#endif

Sources/Extensions/Widgets/LiveActivity/HALockScreenView.swift

@@ -1,3 +1,4 @@
+#if os(iOS) && !targetEnvironment(macCatalyst)
 import ActivityKit
 import Shared
 import SwiftUI
@@ -83,3 +84,4 @@ struct HALockScreenView: View {
         return .haPrimary
     }
 }
+#endif