[Example] Add ColorAnimationExample

Example/HostingExample/ViewController.swift

@@ -66,6 +66,6 @@ class ViewController: NSViewController {
 
 struct ContentView: View {
     var body: some View {
-        EquatableDemoView(count: 0, tag: 0)
+        ColorAnimationExample()
     }
 }

Example/SharedExample/Animation/ColorAnimationExample.swift

@@ -0,0 +1,28 @@
+//
+//  ColorAnimationExample.swift
+//  SharedExample
+//
+//  Created by Kyle on 2025/7/20.
+//
+#if OPENSWIFTUI
+import OpenSwiftUI
+#else
+import SwiftUI
+#endif
+import Foundation
+
+struct ColorAnimationExample: View {
+    @State private var showRed = false
+    var body: some View {
+        VStack {
+            Color(platformColor: showRed ? .red : .blue)
+                .frame(width: showRed ? 200 : 400, height: showRed ? 200 : 400)
+        }
+        .animation(.easeInOut(duration: 2), value: showRed)
+        .onAppear {
+            DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
+                showRed.toggle()
+            }
+        }
+    }
+}

Example/SharedExample/Extension/Color+Platform.swift

@@ -0,0 +1,30 @@
+//
+//  Color+Platform.swift
+//  SharedExample
+//
+//  Created by Kyle on 2025/7/20.
+//
+
+#if OPENSWIFTUI
+import OpenSwiftUI
+#else
+import SwiftUI
+#endif
+
+#if os(iOS)
+import UIKit
+typealias PlatformColor = UIColor
+#elseif os(macOS)
+import AppKit
+typealias PlatformColor = NSColor
+#endif
+
+extension Color {
+    init(platformColor: PlatformColor) {
+        #if os(iOS)
+        self.init(uiColor: platformColor)
+        #elseif os(macOS)
+        self.init(nsColor: platformColor)
+        #endif
+    }
+}

Example/SharedExample/View/AppearanceActionModifierExample.swift

@@ -12,16 +12,8 @@ import Foundation
 struct AppearanceActionModifierExample: View {
     @State private var first = true
 
-    var color: Color {
-        #if os(macOS)
-        Color(nsColor: first ? .red : .blue)
-        #else
-        Color(uiColor: first ? .red : .blue)
-        #endif
-    }
-
     var body: some View {
-        color
+        Color(platformColor: first ? .red : .blue)
             .onAppear {
                 print("View appear")
                 DispatchQueue.main.asyncAfter(deadline: .now() + 1) {

Example/SharedExample/View/NamespaceExample.swift

@@ -13,17 +13,8 @@ struct NamespaceExample: View {
     @State private var first = true
     @Namespace private var id
 
-    var color: Color {
-        #if os(macOS)
-        Color.red
-        #else
-
-        Color(uiColor: first ? .red : .blue)
-        #endif
-    }
-
     var body: some View {
-        color
+        Color(platformColor: first ? .red : .blue)
             .onAppear {
                 print("View appear \(id)")
                 DispatchQueue.main.asyncAfter(deadline: .now() + 1) {