跨平台窗口适配：支持 Windows 和 Linux

本次提交通过条件编译引入不同平台的运行时命名空间，并新增 CreateWindow 方法以根据操作系统创建对应窗口类型。同时在项目文件中增加了对 Windows 和 Linux 运行时的引用，提升了程序的跨平台能力。

Author: maikebing

src/Demos/SerialPort/Program.cs

@@ -1,5 +1,8 @@
 using LVGLSharp;
 using LVGLSharp.Interop;
+using LVGLSharp.Runtime.Windows;
+using LVGLSharp.Runtime.Linux;
+using System.ComponentModel.Design;
 using System.Diagnostics;
 using System.IO.Ports;
 using System.Runtime.CompilerServices;
@@ -28,7 +31,7 @@ unsafe class Program
 
     static void Main(string[] args)
     {
-        window = PlatformWindowFactory.Create();
+        window = CreateWindow();
         window.Init();
 
         root = window.Root;
@@ -40,6 +43,18 @@ static void Main(string[] args)
         window.StartLoop(() => { });
     }
 
+    static IWindow CreateWindow()
+    {
+        if (Environment.OSVersion.Platform == PlatformID.Win32NT)
+        {
+            return new Win32Window("SerialPort", 700, 360);
+        }
+        else
+        {
+            return new LinuxView();
+        }
+    }
+
     [UnmanagedCallersOnly(CallConvs = new[] { typeof(CallConvCdecl) })]
     static unsafe void RefButtonClick(lv_event_t* obj)
     {

src/Demos/SerialPort/SerialPort.csproj

@@ -2,15 +2,12 @@
 
 <PropertyGroup>
 <OutputType>WinExe</OutputType>
-<TargetFrameworks>net10.0-windows;net10.0</TargetFrameworks>
+<TargetFramework>net10.0</TargetFramework>
 <ImplicitUsings>enable</ImplicitUsings>
 <Nullable>enable</Nullable>
 <InvariantGlobalization>true</InvariantGlobalization>
 <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-</PropertyGroup>
-
-<PropertyGroup Condition="'$(TargetFramework)' == 'net10.0'">
-<PublishAot>true</PublishAot>
+	<PublishAot>true</PublishAot>
 </PropertyGroup>
 
 <ItemGroup>
@@ -21,6 +18,8 @@
 
 <ItemGroup>
 <ProjectReference Include="..\..\LVGLSharp.Core\LVGLSharp.Core.csproj" />
+    <ProjectReference Include="..\..\LVGLSharp.Windows\LVGLSharp.Runtime.Windows.csproj" />
+    <ProjectReference Include="..\..\LVGLSharp.Runtime.Linux\LVGLSharp.Runtime.Linux.csproj" />
 </ItemGroup>
 
 </Project>