Phase 5-UI: Generischer Core-Trade-Log + modulübergreifendes Dashboard

- Core: TradeRecord (Modell) + ITradeLogRepository (+ Mongo-Impl, Collection
  "trade_log"), in AddCorePersistence registriert. Realisiert den generischen,
  modulneutralen Trade-Log aus Entscheidung #2.
- Dual-Write: PersistenceService schreibt geschlossene Copy-Trades zusaetzlich als
  generischen TradeRecord (ModuleName="CopyTrading").
- Neue DashboardView (UserControl + Designer): zeigt die letzten Trades ALLER
  Module (GetRecent) mit Konto-Aufloesung + Kurzauswertung (Gesamt-PnL, Anzahl,
  Aufschluesselung je Modul). btn_dashboard im Launcher, View "core.dashboard".
- Build 0 Fehler.

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

services/PersistenceService.cs

@@ -1,6 +1,7 @@
 using System.Threading.Channels;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
+using PolyTrader.Core.Persistence;
 using PolyTrader.Modules.CopyTrading.Persistence;
 using PolyTraderSharp.Models;
 
@@ -10,13 +11,15 @@ namespace PolyTraderSharp.Services
     {
         private readonly ChannelReader<ClosedTrade> _tradeReader;
         private readonly ICopyTradeLogRepository _tradeLog;
+        private readonly ITradeLogRepository _coreTradeLog;
         private readonly TerminalLogger _logger;
         private readonly JobStatusRow _jobStatus;
 
-        public PersistenceService(ChannelReader<ClosedTrade> tradeReader, ICopyTradeLogRepository tradeLog, TerminalLogger logger, JobManager jobManager)
+        public PersistenceService(ChannelReader<ClosedTrade> tradeReader, ICopyTradeLogRepository tradeLog, ITradeLogRepository coreTradeLog, TerminalLogger logger, JobManager jobManager)
         {
             _tradeReader = tradeReader;
             _tradeLog = tradeLog;
+            _coreTradeLog = coreTradeLog;
             _logger = logger;
 
             _jobStatus = new JobStatusRow
@@ -43,6 +46,7 @@ namespace PolyTraderSharp.Services
 
             // One-time index setup (moved out of hot loop)
             _tradeLog.EnsureIndexes();
+            _coreTradeLog.EnsureIndexes();
 
             // We do a loop waiting for items in the channel
             await foreach(var trade in _tradeReader.ReadAllAsync(stoppingToken))
@@ -72,7 +76,27 @@ namespace PolyTraderSharp.Services
                     }
 
                     _tradeLog.Insert(trade);
-                    
+
+                    // Dual-Write: generischer, modulübergreifender Core-Trade-Log (fürs Dashboard).
+                    _coreTradeLog.Insert(new TradeRecord
+                    {
+                        ModuleName = "CopyTrading",
+                        AccountId = trade.AccountId,
+                        IsDemo = trade.IsDemo,
+                        TokenId = trade.TokenId,
+                        MarketQuestion = trade.MarketQuestion,
+                        Outcome = trade.Outcome,
+                        Side = trade.Side,
+                        EntryPrice = trade.EntryPrice,
+                        ExitPrice = trade.ExitPrice,
+                        Size = trade.Size,
+                        RealizedPnl = trade.RealizedPnl,
+                        PnlPercent = trade.PnlPercent,
+                        OpenedAt = trade.OpenedAt,
+                        ClosedAt = trade.ClosedAt,
+                        ExitReason = trade.ExitReason
+                    });
+
                     _logger.Debug($"Saved ClosedTrade {trade.TradeId} to MongoDB");
                     _jobStatus.LastRun = DateTime.Now;
                 }