Add SessionEndpoint, update ChatEndpoint, update deploy script and project file, remove DEVY.md

Endpoints/SessionEndpoint.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json;
 using System.Threading.Tasks;
@@ -17,6 +18,7 @@ public static class SessionEndpoint
         app.MapPost("/api/sessions", HandleCreate);
         app.MapPut("/api/sessions/{sessionId}", HandleUpdate);
         app.MapDelete("/api/sessions/{sessionId}", HandleDelete);
+        app.MapGet("/api/sessions/{sessionId}/system-prompt", HandleSystemPrompt);
     }
 
     private static async Task HandleList(HttpContext ctx, DatabaseService db)
@@ -81,4 +83,52 @@ public static class SessionEndpoint
         await db.DeleteSession(sessionId);
         ctx.Response.StatusCode = 204;
     }
+
+    private static async Task HandleSystemPrompt(HttpContext ctx, DatabaseService db)
+    {
+        var sessionId = ctx.Request.RouteValues["sessionId"]?.ToString();
+        if (string.IsNullOrEmpty(sessionId))
+        {
+            ctx.Response.StatusCode = 400;
+            return;
+        }
+
+        var session = await db.GetSession(sessionId);
+        if (session == null)
+        {
+            ctx.Response.StatusCode = 404;
+            return;
+        }
+
+        if (string.IsNullOrEmpty(session.AgentId))
+        {
+            ctx.Response.StatusCode = 400;
+            await ctx.Response.WriteAsJsonAsync(new { error = "Kein Agent ausgewählt" });
+            return;
+        }
+
+        var agent = await db.GetAgent(session.AgentId);
+        if (agent == null)
+        {
+            ctx.Response.StatusCode = 400;
+            await ctx.Response.WriteAsJsonAsync(new { error = "Agent nicht gefunden" });
+            return;
+        }
+
+        var promptParts = new List<string>();
+        promptParts.Add($"Du bist {agent.Name}.");
+        if (!string.IsNullOrWhiteSpace(agent.Persona))
+            promptParts.Add($"## Persona\n{agent.Persona}");
+        if (!string.IsNullOrWhiteSpace(agent.Instructions))
+            promptParts.Add($"## Instructions\n{agent.Instructions}");
+        if (!string.IsNullOrWhiteSpace(session.Workspace))
+            promptParts.Add($"## Workspace\n{session.Workspace}");
+        if (!string.IsNullOrWhiteSpace(session.Context))
+            promptParts.Add($"## Kontext\n{session.Context}");
+
+        var systemPrompt = string.Join("\n\n", promptParts);
+
+        ctx.Response.ContentType = "text/plain; charset=utf-8";
+        await ctx.Response.WriteAsync(systemPrompt);
+    }
 }