Add iOS/iPad target with platform-adaptive UI

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mlbTVOS/Views/Components/PlatformUI.swift

@@ -0,0 +1,39 @@
+import SwiftUI
+
+struct PlatformPressButtonStyle: ButtonStyle {
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .scaleEffect(configuration.isPressed ? 0.98 : 1.0)
+            .opacity(configuration.isPressed ? 0.92 : 1.0)
+            .animation(.easeOut(duration: 0.16), value: configuration.isPressed)
+    }
+}
+
+extension View {
+    @ViewBuilder
+    func platformCardStyle() -> some View {
+        #if os(tvOS)
+        self.buttonStyle(.card)
+        #else
+        self.buttonStyle(PlatformPressButtonStyle())
+        #endif
+    }
+
+    @ViewBuilder
+    func platformFocusSection() -> some View {
+        #if os(tvOS)
+        self.focusSection()
+        #else
+        self
+        #endif
+    }
+
+    @ViewBuilder
+    func platformFocusable(_ enabled: Bool = true) -> some View {
+        #if os(tvOS)
+        self.focusable(enabled)
+        #else
+        self
+        #endif
+    }
+}