Dashboard: quitar títulos duplicados en cards de gráficas (build 81) #33

showsTitle (default true) en HorizontalPerformanceChart, DrawdownChart,
VolatilityChartView, PredictionChartView y YearOverYearChartView; el
pageContent del Dashboard pasa false porque el header de la card ya nombra
la página. La sección Charts no cambia.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L38583J7AYWCVPevkivscj

PortfolioJournal/Views/Dashboard/EvolutionChart.swift

@@ -177,19 +177,22 @@ struct EvolutionChartCard: View {
                 .frame(height: 150)
                 .padding(.vertical, 8)
                 allocationLegend
+            // showsTitle: false — the card header already names the page;
+            // the embedded charts' own titles duplicated it.
             case .performance:
-                HorizontalPerformanceChart(data: chartsVM.performanceData)
+                HorizontalPerformanceChart(data: chartsVM.performanceData, showsTitle: false)
             case .drawdown:
-                DrawdownChart(data: chartsVM.drawdownData)
+                DrawdownChart(data: chartsVM.drawdownData, showsTitle: false)
             case .volatility:
-                VolatilityChartView(data: chartsVM.volatilityData)
+                VolatilityChartView(data: chartsVM.volatilityData, showsTitle: false)
             case .prediction:
                 PredictionChartView(
                     predictions: chartsVM.predictionData,
-                    historicalData: chartsVM.evolutionData
+                    historicalData: chartsVM.evolutionData,
+                    showsTitle: false
                 )
             case .yearOverYear:
-                YearOverYearChartView(viewModel: chartsVM)
+                YearOverYearChartView(viewModel: chartsVM, showsTitle: false)
             }
         }
     }