iPhone Duo (fase 1): navegación adaptativa por size class y layouts regular×regular

- ContentView: un único TabView (sidebarAdaptable en iOS 18+) para todas las
  size classes; desaparece el cambio de jerarquía iPhone/iPad, así abrir o
  cerrar el Duo conserva el estado de cada pestaña. @SceneStorage de la tab.
- Fuentes y Diario: NavigationSplitView (lista + detalle a la vez en ancho
  regular, stack colapsable en compacto) con selección nativa de List.
- Dashboard: Quick Update como .inspector (panel lateral junto a los gráficos
  en regular, sheet en compacto).
- Gráficos: chartHeightScale (+35% de alto en regular) vía chartFrame(height:),
  sin ignoresSafeArea en contenido interactivo.
- Liquid Glass (glassEffect) en las etiquetas flotantes del Diario en iOS 26+.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01F1u4K16xy7eQVtgsYNZ9Vn

PortfolioJournal/Views/Charts/PredictionChartView.swift

@@ -36,10 +36,10 @@ struct PredictionChartView: View {
                     VStack(alignment: .trailing, spacing: 2) {
                         Text("Forecast")
                             .font(.caption)
-                            .foregroundColor(.secondary)
+                            .foregroundStyle(.secondary)
                         Text(lastPrediction.formattedValue)
                             .font(.subheadline.weight(.semibold))
-                            .foregroundColor(.appPrimary)
+                            .foregroundStyle(Color.appPrimary)
                     }
                 }
             }
@@ -47,7 +47,7 @@ struct PredictionChartView: View {
             if let algorithm = predictions.first?.algorithm {
                 Text("Algorithm: \(algorithm.displayName)")
                     .font(.caption)
-                    .foregroundColor(.secondary)
+                    .foregroundStyle(.secondary)
             }
 
             if !predictions.isEmpty && historicalData.count >= 2 {
@@ -185,7 +185,7 @@ struct PredictionChartView: View {
                         }
                     }
                 }
-                .frame(height: 280)
+                .chartFrame(height: 280)
 
                 // Stats row
                 if let currentValue = historicalData.last?.value,
@@ -206,7 +206,7 @@ struct PredictionChartView: View {
                             .frame(width: 20, height: 3)
                         Text("Historical")
                             .font(.caption)
-                            .foregroundColor(.secondary)
+                            .foregroundStyle(.secondary)
                     }
 
                     HStack(spacing: 6) {
@@ -223,7 +223,7 @@ struct PredictionChartView: View {
                             )
                         Text("Prediction")
                             .font(.caption)
-                            .foregroundColor(.secondary)
+                            .foregroundStyle(.secondary)
                     }
 
                     HStack(spacing: 6) {
@@ -232,7 +232,7 @@ struct PredictionChartView: View {
                             .frame(width: 20, height: 10)
                         Text("Confidence")
                             .font(.caption)
-                            .foregroundColor(.secondary)
+                            .foregroundStyle(.secondary)
                     }
 
                     HStack(spacing: 6) {
@@ -241,7 +241,7 @@ struct PredictionChartView: View {
                             .frame(width: 20, height: 2)
                         Text("Bull")
                             .font(.caption)
-                            .foregroundColor(.secondary)
+                            .foregroundStyle(.secondary)
                     }
 
                     HStack(spacing: 6) {
@@ -250,7 +250,7 @@ struct PredictionChartView: View {
                             .frame(width: 20, height: 2)
                         Text("Bear")
                             .font(.caption)
-                            .foregroundColor(.secondary)
+                            .foregroundStyle(.secondary)
                     }
                 }
 
@@ -274,7 +274,7 @@ struct PredictionChartView: View {
                             Spacer()
                             Text(lastPrediction.formattedConfidenceRange)
                                 .font(.caption)
-                                .foregroundColor(.secondary)
+                                .foregroundStyle(.secondary)
                         }
 
                         if let currentValue = historicalData.last?.value {
@@ -293,7 +293,7 @@ struct PredictionChartView: View {
                                     Text(String(format: "%+.1f%%", changePercent))
                                         .font(.subheadline.weight(.medium))
                                 }
-                                .foregroundColor(change >= 0 ? .positiveGreen : .negativeRed)
+                                .foregroundStyle(change >= 0 ? Color.positiveGreen : Color.negativeRed)
                             }
                         }
                     }
@@ -310,24 +310,24 @@ struct PredictionChartView: View {
                 VStack(spacing: 12) {
                     Image(systemName: "wand.and.stars")
                         .font(.system(size: 40))
-                        .foregroundColor(.secondary)
+                        .foregroundStyle(.secondary)
 
                     Text("Not enough data for predictions")
                         .font(.subheadline)
-                        .foregroundColor(.secondary)
+                        .foregroundStyle(.secondary)
 
                     Text("Add at least 3 snapshots to generate predictions")
                         .font(.caption)
-                        .foregroundColor(.secondary)
+                        .foregroundStyle(.secondary)
                         .multilineTextAlignment(.center)
                 }
-                .frame(height: 280)
+                .chartFrame(height: 280)
                 .frame(maxWidth: .infinity)
             }
         }
         .padding()
         .background(Color(.systemBackground))
-        .cornerRadius(AppConstants.UI.cornerRadius)
+        .clipShape(RoundedRectangle(cornerRadius: AppConstants.UI.cornerRadius))
         .shadow(color: .black.opacity(0.05), radius: 8, y: 2)
     }