fix: db migration tab char corrupted, restore historical trades

dashboard.go

@@ -373,6 +373,11 @@ func (d *Dashboard) broadcastLoop() {
 			"duration":     time.Since(pos.StartedAt).Round(time.Second).String(),
 			"started_at":   pos.StartedAt.Format("15:04:05"),
 			"started_ts":   pos.StartedAt.UnixMilli(),
+			"long_exchange": pos.LongLeg.Exchange,
+			"short_exchange": pos.ShortLeg.Exchange,
+			"long_entry":   pos.LongLeg.EntryPrice,
+			"short_entry":  pos.ShortLeg.EntryPrice,
+			"db_trade_id":  pos.DBTradeID,
 		}
 
 			// Calculate live PnL from current prices — use weighted average for scale-ins
@@ -474,6 +479,18 @@ func (d *Dashboard) broadcastLoop() {
 		d.connMu.RUnlock()
 		stats["connections"] = connInfo
 
+		// Per-exchange fund tracking
+		exFunds := d.trader.GetExchangeFunds()
+		exFundsMap := make(map[string]map[string]float64, len(exFunds))
+		for ex, ef := range exFunds {
+			exFundsMap[ex] = map[string]float64{
+				"balance":   math.Round(ef.Balance*100) / 100,
+				"total_fee": math.Round(ef.TotalFee*100) / 100,
+				"total_pnl": math.Round(ef.TotalPnl*100) / 100,
+			}
+		}
+		stats["exchange_funds"] = exFundsMap
+
 		// Blacklist — stale spread coins
 		bl := d.trader.GetBlacklist()
 		blList := make([]map[string]interface{}, 0, len(bl))