feat: 对部分功能进行区域限制修正

App/Config.cs

@@ -292,6 +292,7 @@ partial class NetworkConfigGroup
             [ConfigItem<int>("SystemDebugAnim", 9)] public partial int AnimationSpeed { get; set; }
             [ConfigItem<bool>("SystemDebugDelay", false)] public partial bool AddRandomDelay { get; set; }
             [ConfigItem<bool>("SystemDebugSkipCopy", false)] public partial bool DontCopy { get; set; }
+            [ConfigItem<bool>("SystemDebugAllowRestrictedFeature", false)] public partial bool AllowRestrictedFeature { get; set; }
         }
     }
 

Net/NetworkHelper.cs

@@ -1,5 +1,9 @@
+using System;
 using System.Net;
+using System.Net.Http;
 using System.Net.Sockets;
+using System.Threading.Tasks;
+using PCL.Core.Logging;
 
 namespace PCL.Core.Net;
 
@@ -13,4 +17,40 @@ public static int NewTcpPort()
         listener.Stop();
         return port;
     }
+
+    /// <summary>
+    /// 测试 HTTP 连通性
+    /// </summary>
+    /// <param name="url">目标 Url，留空则为 baidu.com</param>
+    /// <param name="timeout">超时时间 (默认 3000 ms)</param>
+    /// <returns>若 HTTP 连接成功，则返回 true；反之，则返回 false</returns>
+    public static async Task<bool> TestHttpConnectionAsync(string url = "http://www.baidu.com", int timeout = 3000)
+    {
+        try
+        {
+            using (var httpClient = new HttpClient())
+            {
+                httpClient.Timeout = TimeSpan.FromMilliseconds(timeout);
+
+                var request = new HttpRequestMessage(HttpMethod.Head, url);
+                var response = await httpClient.SendAsync(request);
+
+                return response.IsSuccessStatusCode;
+            }
+        }
+        catch (HttpRequestException ex)
+        {
+            LogWrapper.Error($"HTTP 请求异常: {ex.Message}");
+            return false;
+        }
+        catch (TaskCanceledException)
+        {
+            LogWrapper.Error("请求超时");
+            return false;
+        }
+        catch
+        {
+            return false;
+        }
+    }
 }

Utils/RegionUtils.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Globalization;
+using PCL.Core.App;
+
+namespace PCL.Core.Utils;
+
+public static class RegionUtils
+{
+    /// <summary>
+    /// 获取区域限制状态
+    /// </summary>
+    public static bool IsRestrictedFeatAllowed =>
+        Config.System.Debug.AllowRestrictedFeature || (TimeZoneInfo.Local.Id == "China Standard Time" &&
+                                                       (CultureInfo.CurrentCulture.Name == "zh-CN" || CultureInfo.CurrentUICulture.Name == "zh-CN"));
+}