fix: 修复数据库与SignalR无法连接的问题

server/src/Controllers/DataController.cs

@@ -18,16 +18,11 @@ public class DataController : ControllerBase
 {
     private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
-    private readonly Database.UserManager _userManager;
+    private readonly Database.UserManager _userManager = new();
 
     // 固定的实验板IP,端口,MAC地址
     private const string BOARD_IP = "169.254.109.0";
 
-    public DataController(Database.UserManager userManager)
-    {
-        _userManager = userManager;
-    }
-
     /// <summary>
     /// 获取本机IP地址（优先选择与实验板同网段的IP）
     /// </summary>

server/src/Controllers/DebuggerController.cs

@@ -15,12 +15,7 @@ public class DebuggerController : ControllerBase
 {
     private static readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
-    private readonly Database.UserManager _userManager;
-
-    public DebuggerController(Database.UserManager userManager)
-    {
-        this._userManager = userManager;
-    }
+    private readonly Database.UserManager _userManager = new();
 
     /// <summary>
     /// 获取当前用户绑定的调试器实例

server/src/Controllers/ExamController.cs

@@ -15,19 +15,9 @@ public class ExamController : ControllerBase
 {
     private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
-    private readonly ExamManager _examManager;
-    private readonly ResourceManager _resourceManager;
-    private readonly UserManager _userManager;
-
-    public ExamController(
-        ExamManager examManager,
-        ResourceManager resourceManager,
-        UserManager userManager)
-    {
-        _examManager = examManager;
-        _resourceManager = resourceManager;
-        _userManager = userManager;
-    }
+    private readonly ExamManager _examManager = new();
+    private readonly ResourceManager _resourceManager = new();
+    private readonly UserManager _userManager = new();
 
     /// <summary>
     /// 获取所有实验列表

server/src/Controllers/HdmiVideoStreamController.cs

@@ -14,12 +14,11 @@ public class HdmiVideoStreamController : ControllerBase
     private readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
     private readonly HttpHdmiVideoStreamService _videoStreamService;
-    private readonly Database.UserManager _userManager;
+    private readonly Database.UserManager _userManager = new();
 
-    public HdmiVideoStreamController(HttpHdmiVideoStreamService videoStreamService, Database.UserManager userManager)
+    public HdmiVideoStreamController(HttpHdmiVideoStreamService videoStreamService)
     {
         _videoStreamService = videoStreamService;
-        _userManager = userManager;
     }
 
     // 管理员获取所有板子的 endpoints

server/src/Controllers/JtagController.cs

@@ -17,17 +17,14 @@ public class JtagController : ControllerBase
     private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
     private readonly ProgressTrackerService _tracker;
-    private readonly UserManager _userManager;
-    private readonly ResourceManager _resourceManager;
+    private readonly UserManager _userManager = new();
+    private readonly ResourceManager _resourceManager = new();
 
     private const string BITSTREAM_PATH = "bitstream/Jtag";
 
-    public JtagController(
-        ProgressTrackerService tracker, UserManager userManager, ResourceManager resourceManager)
+    public JtagController(ProgressTrackerService tracker)
     {
         _tracker = tracker;
-        _userManager = userManager;
-        _resourceManager = resourceManager;
     }
 
     /// <summary>

server/src/Controllers/LogicAnalyzerController.cs

@@ -15,12 +15,7 @@ public class LogicAnalyzerController : ControllerBase
 {
     private static readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
-    private readonly Database.UserManager _userManager;
-
-    public LogicAnalyzerController(Database.UserManager userManager)
-    {
-        _userManager = userManager;
-    }
+    private readonly Database.UserManager _userManager = new();
 
     /// <summary>
     /// 获取逻辑分析仪实例

server/src/Controllers/OscilloscopeController.cs

@@ -15,12 +15,7 @@ public class OscilloscopeApiController : ControllerBase
 {
     private static readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
-    private readonly Database.UserManager _userManager;
-
-    public OscilloscopeApiController(Database.UserManager userManager)
-    {
-        _userManager = userManager;
-    }
+    private readonly Database.UserManager _userManager = new();
 
     /// <summary>
     /// 获取示波器实例

server/src/Controllers/ResourceController.cs

@@ -15,14 +15,8 @@ public class ResourceController : ControllerBase
 {
     private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
-    private readonly UserManager _userManager;
-    private readonly ResourceManager _resourceManager;
-
-    public ResourceController(UserManager userManager, ResourceManager resourceManager)
-    {
-        _userManager = userManager;
-        _resourceManager = resourceManager;
-    }
+    private readonly UserManager _userManager = new();
+    private readonly ResourceManager _resourceManager = new();
 
     /// <summary>
     /// 添加资源（文件上传）

server/src/Controllers/VideoStreamController.cs

@@ -18,7 +18,7 @@ public class VideoStreamController : ControllerBase
     private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
 
     private readonly HttpVideoStreamService _videoStreamService;
-    private readonly Database.UserManager _userManager;
+    private readonly Database.UserManager _userManager = new();
 
     public class AvailableResolutionsResponse
     {
@@ -32,13 +32,10 @@ public class VideoStreamController : ControllerBase
     /// 初始化HTTP视频流控制器
     /// </summary>
     /// <param name="videoStreamService">HTTP视频流服务</param>
-    /// <param name="userManager">用户管理服务</param>
-    public VideoStreamController(
-        HttpVideoStreamService videoStreamService, Database.UserManager userManager)
+    public VideoStreamController(HttpVideoStreamService videoStreamService)
     {
         logger.Info("创建VideoStreamController，命名空间：{Namespace}", this.GetType().Namespace);
         _videoStreamService = videoStreamService;
-        _userManager = userManager;
     }
 
     private Optional<string> TryGetBoardId()