Fixed Clear Line issue

IOModuleTestBlazor/Services/ISerialPortService.cs

@@ -21,6 +21,9 @@ public interface ISerialPortService
     /// Each line is prefixed with "&gt; " (sent) or "&lt; " (received).</summary>
     IReadOnlyList<string> GetLines();
 
+    /// <summary>Clears the line buffer.</summary>
+    void ClearLines();
+
     /// <summary>Fired on the SerialPort receive thread when new lines arrive.</summary>
     event Action? DataReceived;
 }

IOModuleTestBlazor/Services/SerialPortService.cs

@@ -97,6 +97,12 @@ public sealed class SerialPortService : ISerialPortService, IDisposable
             return _lines.ToList();
     }
 
+    public void ClearLines()
+    {
+        lock (_lock)
+            _lines.Clear();
+    }
+
     private void OnDataReceived(object sender, SerialDataReceivedEventArgs e)
     {
         SerialPort? port;