canbug修复

MonitorModule/ViewModels/Dialogs/ValueLimitViewModel.cs

@@ -117,13 +117,23 @@ namespace MonitorModule.ViewModels.Dialogs
                 EnsureValueLimit(fingerprint, displayName, displayName, methodName);
             }
 
-            // 3. 发现 CAN 信号并加入 ValueLimitList / DeviceSingleList
+            // 3. 发现 CAN 信号并加入 ValueLimitList，同时收集有效信号名
+            var validCanSignalNames = new HashSet<string>();
             foreach (var (displayName, fingerprint, methodName) in DiscoverCanSignals())
             {
-                //DeviceSingleList.Add(displayName);
                 _canSignalMap[displayName] = (fingerprint, methodName);
                 EnsureValueLimit(fingerprint, displayName, displayName, methodName);
+                validCanSignalNames.Add(displayName);
             }
+
+            // 4. 清理已不存在于 DBC 中的 CAN 信号（Fingerprint 以 "CAN" 开头且不在有效集合中）
+            var staleCanSignals = ValueLimitList
+                .Where(x => !string.IsNullOrEmpty(x.Fingerprint) &&
+                            x.Fingerprint.StartsWith("CAN") &&
+                            !validCanSignalNames.Contains(x.SignalName))
+                .ToList();
+            foreach (var item in staleCanSignals)
+                ValueLimitList.Remove(item);
         }
 
         /// <summary>