Initial commit: ClawdDotNet

Import des bestehenden Projektstands in Git.
- .NET 10 WinForms Anwendung (Multi-Agent / Tool-System)
- .gitignore fuer Build-Artefakte, Secrets und Runtime-Daten ergaenzt

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/ClawdDotNet.Core/Api/Models/ChatResponse.cs

@@ -0,0 +1,54 @@
+using System.Text.Json.Serialization;
+
+namespace ClawdDotNet.Core.Api.Models;
+
+public sealed class ChatResponse
+{
+    [JsonPropertyName("id")]
+    public string Id { get; set; } = "";
+
+    [JsonPropertyName("choices")]
+    public List<Choice> Choices { get; set; } = new();
+
+    [JsonPropertyName("usage")]
+    public Usage? Usage { get; set; }
+
+    [JsonPropertyName("model")]
+    public string? Model { get; set; }
+
+    [JsonPropertyName("error")]
+    public ApiError? Error { get; set; }
+}
+
+public sealed class Choice
+{
+    [JsonPropertyName("index")]
+    public int Index { get; set; }
+
+    [JsonPropertyName("message")]
+    public ChatMessage Message { get; set; } = new();
+
+    [JsonPropertyName("finish_reason")]
+    public string? FinishReason { get; set; }
+}
+
+public sealed class Usage
+{
+    [JsonPropertyName("prompt_tokens")]
+    public int PromptTokens { get; set; }
+
+    [JsonPropertyName("completion_tokens")]
+    public int CompletionTokens { get; set; }
+
+    [JsonPropertyName("total_tokens")]
+    public int TotalTokens { get; set; }
+}
+
+public sealed class ApiError
+{
+    [JsonPropertyName("message")]
+    public string Message { get; set; } = "";
+
+    [JsonPropertyName("code")]
+    public int? Code { get; set; }
+}