try fix download client #2

code/Executable/DTOs/CreateDownloadClientDto.cs

@@ -0,0 +1,66 @@
+using Common.Enums;
+using Common.Exceptions;
+
+namespace Executable.DTOs;
+
+/// <summary>
+/// DTO for creating a new download client (without ID)
+/// </summary>
+public sealed record CreateDownloadClientDto
+{
+    /// <summary>
+    /// Whether this client is enabled
+    /// </summary>
+    public bool Enabled { get; init; } = false;
+    
+    /// <summary>
+    /// Friendly name for this client
+    /// </summary>
+    public required string Name { get; init; }
+    
+    /// <summary>
+    /// Type name of download client
+    /// </summary>
+    public required DownloadClientTypeName TypeName { get; init; }
+    
+    /// <summary>
+    /// Type of download client
+    /// </summary>
+    public required DownloadClientType Type { get; init; }
+    
+    /// <summary>
+    /// Host address for the download client
+    /// </summary>
+    public Uri? Host { get; init; }
+    
+    /// <summary>
+    /// Username for authentication
+    /// </summary>
+    public string? Username { get; init; }
+    
+    /// <summary>
+    /// Password for authentication
+    /// </summary>
+    public string? Password { get; init; }
+    
+    /// <summary>
+    /// The base URL path component, used by clients like Transmission and Deluge
+    /// </summary>
+    public string? UrlBase { get; init; }
+    
+    /// <summary>
+    /// Validates the configuration
+    /// </summary>
+    public void Validate()
+    {
+        if (string.IsNullOrWhiteSpace(Name))
+        {
+            throw new ValidationException("Client name cannot be empty");
+        }
+        
+        if (Host is null && TypeName is not DownloadClientTypeName.Usenet)
+        {
+            throw new ValidationException("Host cannot be empty for non-Usenet clients");
+        }
+    }
+}