@

Phase 3: Trading-Kern (Risk, Execution, Portfolio) mit sicherem Broker-Default

- Core/Trading/TradingModels: Signal, Order(Request/Result), RiskContext/Decision,
  Account, Position, Quote, ExecutionResult, Enums (Side/OrderType/Mode)
- IBrokerClient + NullBrokerClient (sicherer Default, handelt NIE bis IBKR-Adapter verifiziert)
- RiskService (+IRiskService): Sizing nach MaxTrade%, Modul-Limit, Slippage; Buy/Sell
- PortfolioService (+IPortfolioService): core_position + core_trade_history + core_budget
- ExecutionService (+IExecutionService): Signal -> Kurs -> Konto -> Risiko -> Order -> Buchung
- TradingSettings in AppSettings (Paper/Live, TradingEnabled, Risikoparameter)
- CoreMigrations: core_position; DI-Registrierung der Trading-Services
- Tests: RiskService (11) + ExecutionService (6, NSubstitute) -> 38/38 gruen

Offen (bewusst gekapselt): echter IbkrBrokerClient gegen Client-Portal-Gateway (manuell verifizieren).

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

Core/Settings/AppSettings.cs

@@ -1,4 +1,5 @@
 using System.ComponentModel;
+using IBKRTrader.Core.Trading;
 
 namespace IBKRTrader.Core.Settings;
 
@@ -171,6 +172,48 @@ public class WorkerSettings
     public override string ToString() => "Worker-Konfiguration";
 }
 
+// ─── Trading ─────────────────────────────────────────────────────────────────
+
+[TypeConverter(typeof(ExpandableObjectConverter))]
+public class TradingSettings
+{
+    [Category("Trading")]
+    [DisplayName("Modus")]
+    [Description("Handelsmodus: Paper (Test-Account, Port 4002) oder Live (Port 4001)")]
+    public string Mode { get; set; } = "Paper";
+
+    [Category("Trading")]
+    [DisplayName("Trading aktiv")]
+    [Description("Globaler Hauptschalter. Nur wenn aktiv werden Orders ausgeführt.")]
+    public bool TradingEnabled { get; set; } = false;
+
+    [Category("Trading")]
+    [DisplayName("Max. je Trade (%)")]
+    [Description("Maximaler Nominalwert einer einzelnen Position in % des Kontowerts")]
+    public double MaxTradePercent { get; set; } = 5.0;
+
+    [Category("Trading")]
+    [DisplayName("Max. je Modul (%)")]
+    [Description("Maximaler Gesamt-Nominalwert aller Positionen eines Moduls in % des Kontowerts")]
+    public double MaxPositionPercentPerModule { get; set; } = 20.0;
+
+    [Category("Trading")]
+    [DisplayName("Max. Slippage (%)")]
+    [Description("Maximal erlaubte Abweichung zwischen Limit-Preis und aktuellem Kurs")]
+    public double MaxSlippagePercent { get; set; } = 5.0;
+
+    [Category("Trading")]
+    [DisplayName("Gewinnziel (%)")]
+    [Description("Ziel-Gewinn einer Position in Prozent (für spätere Exit-Logik)")]
+    public double ProfitTargetPercent { get; set; } = 50.0;
+
+    /// <summary>Parst den Modus in das Enum (Fallback: Paper).</summary>
+    public TradingMode ParsedMode =>
+        Enum.TryParse<TradingMode>(Mode, true, out var m) ? m : TradingMode.Paper;
+
+    public override string ToString() => $"{Mode} – {(TradingEnabled ? "aktiv" : "inaktiv")}";
+}
+
 // ─── Root ────────────────────────────────────────────────────────────────────
 
 public class AppSettings
@@ -204,4 +247,9 @@ public class AppSettings
     [DisplayName("Worker-Einstellungen")]
     [Description("Zeitpläne der einzelnen Core-Worker")]
     public WorkerSettings    WorkerSettings { get; set; } = new();
+
+    [Category("Trading")]
+    [DisplayName("Trading")]
+    [Description("Handelsmodus und Risiko-Parameter")]
+    public TradingSettings   Trading        { get; set; } = new();
 }