🔧 Fix(Core): 消除编译警告，修复可空性类型不匹配与未使用事件，移除多余 NuGet 包引用

Author: StardustSeemsInk

KitX Clients/KitX Core/KitX.Core/Device/DevicesDiscoveryServer.cs

@@ -85,7 +85,9 @@ public void ConfigurePort(int port)
     /// <summary>
     /// Event raised when a device goes offline
     /// </summary>
+#pragma warning disable CS0067
     public event EventHandler<DeviceOfflineEventArgs>? DeviceOffline;
+#pragma warning restore CS0067
 
     /// <summary>
     /// Private constructor

KitX Clients/KitX Core/KitX.Core/Device/DevicesServer.cs

@@ -56,7 +56,9 @@ public class DevicesServer : IDeviceServer
     /// <summary>
     /// Event raised when port changes
     /// </summary>
+#pragma warning disable CS0067
     public event EventHandler<int>? PortChanged;
+#pragma warning restore CS0067
 
     /// <summary>
     /// Gets or sets the port
@@ -381,6 +383,15 @@ private async System.Threading.Tasks.Task HandleExchangeKeyAsync(HttpContext con
 
             // For now, auto-accept the key exchange (in real implementation, this would show a UI)
             // TODO: Integrate with UI for verification code input
+            if (request.DeviceKey is null)
+            {
+                _isExchangingDeviceKey = false;
+                _exchangeDeviceKeyCode = null;
+                context.Response.StatusCode = 400;
+                await context.Response.WriteAsync("Device key is null");
+                return;
+            }
+
             var deviceKeyDecrypted = securityService.AesDecrypt(request.DeviceKey, _exchangeDeviceKeyCode);
             var deviceKeyInstance = JsonSerializer.Deserialize<DeviceKey>(deviceKeyDecrypted);
 

KitX Clients/KitX Core/KitX.Core/Device/PluginsServer.cs

@@ -54,7 +54,9 @@ public class PluginsServer : IPluginServer
     /// <summary>
     /// Event raised when server port changes
     /// </summary>
+#pragma warning disable CS0067
     public event EventHandler<int>? PortChanged;
+#pragma warning restore CS0067
 
     /// <summary>
     /// Gets the list of plugin connections
@@ -457,6 +459,11 @@ public class PluginConnection : IPluginConnection, IPluginConnector
     /// </summary>
     public string? ConnectionId { get; private set; }
 
+    /// <summary>
+    /// IPluginConnector.ConnectionId — non-nullable explicit implementation
+    /// </summary>
+    string IPluginConnector.ConnectionId => ConnectionId!;
+
     /// <summary>
     /// Gets or sets the plugin info
     /// </summary>
@@ -485,7 +492,9 @@ public class PluginConnection : IPluginConnection, IPluginConnector
     /// <summary>
     /// Event raised when plugin reports status (IPluginConnector implementation)
     /// </summary>
+#pragma warning disable CS0067
     public event EventHandler<PluginStatusReportEventArgs>? StatusReport;
+#pragma warning restore CS0067
 
     /// <summary>
     /// Constructor

KitX Clients/KitX Core/KitX.Core/Plugin/PluginsManager.cs

@@ -267,10 +267,10 @@ public async Task<bool> ImportPluginAsync(string kxpFilePath)
 
                     loaderInfo = new LoaderInfo
                     {
-                        LoaderName = loaderStruct.TryGetProperty("LoaderName", out var name) ? name.GetString() : "Unknown",
-                        LoaderVersion = loaderStruct.TryGetProperty("LoaderVersion", out var version) ? version.GetString() : "1.0.0",
-                        LoaderLanguage = loaderStruct.TryGetProperty("LoaderLanguage", out var lang) ? lang.GetString() : "Unknown",
-                        LoaderFramework = loaderStruct.TryGetProperty("LoaderFramework", out var fw) ? fw.GetString() : "Unknown",
+                        LoaderName = loaderStruct.TryGetProperty("LoaderName", out var name) ? name.GetString() ?? "Unknown" : "Unknown",
+                        LoaderVersion = loaderStruct.TryGetProperty("LoaderVersion", out var version) ? version.GetString() ?? "1.0.0" : "1.0.0",
+                        LoaderLanguage = loaderStruct.TryGetProperty("LoaderLanguage", out var lang) ? lang.GetString() ?? "Unknown" : "Unknown",
+                        LoaderFramework = loaderStruct.TryGetProperty("LoaderFramework", out var fw) ? fw.GetString() ?? "Unknown" : "Unknown",
                         SelfLoad = loaderStruct.TryGetProperty("SelfLoad", out var selfLoad) && selfLoad.GetBoolean(),
                         Tags = new Dictionary<string, string>()
                     };
@@ -335,13 +335,13 @@ public async Task<bool> ImportPluginAsync(string kxpFilePath)
                     }
 
                     // Parse other fields
-                    pluginInfo.AuthorName = pluginStruct.TryGetProperty("AuthorName", out var author) ? author.GetString() : "Unknown";
-                    pluginInfo.AuthorLink = pluginStruct.TryGetProperty("AuthorLink", out var authorLink) ? authorLink.GetString() : "";
-                    pluginInfo.PublisherName = pluginStruct.TryGetProperty("PublisherName", out var publisher) ? publisher.GetString() : "Unknown";
-                    pluginInfo.PublisherLink = pluginStruct.TryGetProperty("PublisherLink", out var publisherLink) ? publisherLink.GetString() : "";
-                    pluginInfo.IconInBase64 = pluginStruct.TryGetProperty("IconInBase64", out var icon) ? icon.GetString() : "";
+                    pluginInfo.AuthorName = pluginStruct.TryGetProperty("AuthorName", out var author) ? author.GetString() ?? "Unknown" : "Unknown";
+                    pluginInfo.AuthorLink = pluginStruct.TryGetProperty("AuthorLink", out var authorLink) ? authorLink.GetString() ?? "" : "";
+                    pluginInfo.PublisherName = pluginStruct.TryGetProperty("PublisherName", out var publisher) ? publisher.GetString() ?? "Unknown" : "Unknown";
+                    pluginInfo.PublisherLink = pluginStruct.TryGetProperty("PublisherLink", out var publisherLink) ? publisherLink.GetString() ?? "" : "";
+                    pluginInfo.IconInBase64 = pluginStruct.TryGetProperty("IconInBase64", out var icon) ? icon.GetString() ?? "" : "";
                     pluginInfo.IsMarketVersion = pluginStruct.TryGetProperty("IsMarketVersion", out var marketVer) && marketVer.GetBoolean();
-                    pluginInfo.RootStartupFileName = pluginStruct.TryGetProperty("RootStartupFileName", out var rootFile) ? rootFile.GetString() : "";
+                    pluginInfo.RootStartupFileName = pluginStruct.TryGetProperty("RootStartupFileName", out var rootFile) ? rootFile.GetString() ?? "" : "";
 
                     if (pluginStruct.TryGetProperty("PublishDate", out var publishDate))
                     {

KitX Clients/KitX Core/KitX.Core/Workflow/BlockScripting/BlockScriptExecutionGlobals.cs

@@ -165,7 +165,7 @@ public void Pause(int milliseconds)
     /// 调用插件函数。所有分发策略（类型化调用、fire-and-forget vs 同步等待）
     /// 由 RealPluginManager.CallAuto() 内部自动完成，调用方无需关心。
     /// </summary>
-    public object? PluginCall(string pluginName, string methodName, params object?[] args)
+    public object? PluginCall(string pluginName, string methodName, params object[] args)
     {
         if (_pluginManager == null)
         {
@@ -178,7 +178,7 @@ public void Pause(int milliseconds)
         {
             PluginName = pluginName,
             MethodName = methodName,
-            Parameters = args ?? Array.Empty<object?>()
+            Parameters = args ?? Array.Empty<object>()
         };
 
         try

KitX Clients/KitX Core/KitX.Core/Workflow/Blueprint/Pipeline/NodeBuilder.cs

@@ -241,7 +241,7 @@ private bool IsRegistryFlowControlTerminator(FormattedStatement stmt)
         }
         else
         {
-            var isHelper = _helperNames.Contains(stmt.FunctionName);
+            var isHelper = _helperNames.Contains(stmt.FunctionName ?? string.Empty);
             if (isHelper)
             {
                 var helperNode = (CallHelperNode)_registry.Create(BlueprintNodeType.CallHelper);

KitX Clients/KitX Core/KitX.Core/Workflow/RealPluginManager.cs

@@ -93,6 +93,8 @@ private void OnPluginMessageReceived(object? sender, PluginMessageReceivedEventA
         {
             Log.Information($"[RealPluginManager] OnPluginMessageReceived called with message: {e.Message?.Substring(0, Math.Min(200, e.Message?.Length ?? 0))}...");
 
+            if (e.Message is null) return;
+
             var kwc = JsonSerializer.Deserialize<Request>(e.Message, _serializerOptions);
             if (kwc?.Content is null)
             {