Session-Kontext: Textarea für System-Prompt pro Session

Endpoints/ChatEndpoint.cs

@@ -83,6 +83,9 @@ public static class ChatEndpoint
         if (!string.IsNullOrWhiteSpace(agent.Instructions))
             promptParts.Add($"## Instructions\n{agent.Instructions}");
 
+        if (!string.IsNullOrWhiteSpace(session.Context))
+            promptParts.Add($"## Kontext\n{session.Context}");
+
         var systemPromptText = string.Join("\n\n", promptParts);
 
         var chainId = Guid.NewGuid().ToString("N");

Endpoints/SessionEndpoint.cs

@@ -51,8 +51,9 @@ public static class SessionEndpoint
         var image = body.TryGetProperty("image", out var img) ? img.GetString() : null;
         var agentId = body.TryGetProperty("agentId", out var a) ? a.GetString() : null;
         var workspace = body.TryGetProperty("workspace", out var w) ? w.GetString() : null;
+        var context = body.TryGetProperty("context", out var ctxEl) ? ctxEl.GetString() : null;
 
-        var session = await db.CreateSession(name, description, image, agentId, workspace);
+        var session = await db.CreateSession(name, description, image, agentId, workspace, context);
         await ctx.Response.WriteAsJsonAsync(session);
     }