1.4.1 (build 42): contribución por snapshot, fixes Period vs Period y navegación iPad

- 151: contribución editable por snapshot en cualquier modo (quitado gate detailed)
  con diálogo de propagación al editar: solo este / adelante / atrás / todos
  (SnapshotRepository.propagateContribution, SnapshotFormViewModel.contributionChanged)
- 148: Period vs Period mostraba mal el último mes del period B — la agrupación usaba
  chartMonth(for:) que aplicaba el grace-period del check-in a snapshots históricos;
  ahora agrupa por mes calendario crudo
- 152: iPad Sources no saltaba entre fuentes — añadido .id() al SourceDetailView para
  recrear el StateObject al cambiar de selección
- 146/147: Year vs Year con forecast del año en curso (asterisco de estimado) y KPIs
  arriba / detalle debajo
- 145: card de contribución mensual en SourceDetailView
- Nuevas claves snapshot_contribution_propagate_* en los 7 idiomas

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015qUZrBusG82T37R7PeokqJ

PortfolioJournal/Views/Dashboard/QuickUpdateView.swift

@@ -11,6 +11,7 @@ struct QuickUpdateView: View {
     ) private var sources: FetchedResults<InvestmentSource>
 
     @State private var values: [NSManagedObjectID: String] = [:]
+    @State private var contributions: [NSManagedObjectID: String] = [:]
     @State private var isSaving = false
     @State private var saveError: String?
 
@@ -62,30 +63,51 @@ struct QuickUpdateView: View {
             } message: {
                 Text(saveError ?? "")
             }
+            .onAppear { prefillContributions() }
         }
     }
 
     @ViewBuilder
     private func sourceRow(_ source: InvestmentSource) -> some View {
-        HStack {
-            VStack(alignment: .leading, spacing: 2) {
-                Text(source.name)
-                    .font(.subheadline.weight(.medium))
-                if source.latestValue != .zero {
-                    Text(source.latestValue.currencyString)
+        VStack(spacing: 6) {
+            HStack {
+                VStack(alignment: .leading, spacing: 2) {
+                    Text(source.name)
+                        .font(.subheadline.weight(.medium))
+                    if source.latestValue != .zero {
+                        Text(source.latestValue.currencyString)
+                            .font(.caption)
+                            .foregroundColor(.secondary)
+                    }
+                }
+                Spacer()
+                TextField(
+                    String(localized: "quick_update_placeholder"),
+                    text: valueBinding(for: source)
+                )
+                .keyboardType(.decimalPad)
+                .multilineTextAlignment(.trailing)
+                .frame(width: 120)
+                .font(.subheadline)
+            }
+
+            if contributions[source.objectID] != nil {
+                HStack {
+                    Text(String(localized: "quick_update_contribution_label"))
                         .font(.caption)
                         .foregroundColor(.secondary)
+                    Spacer()
+                    TextField(
+                        String(localized: "quick_update_contribution_placeholder"),
+                        text: contributionBinding(for: source)
+                    )
+                    .keyboardType(.decimalPad)
+                    .multilineTextAlignment(.trailing)
+                    .frame(width: 120)
+                    .font(.caption)
+                    .foregroundColor(.secondary)
                 }
             }
-            Spacer()
-            TextField(
-                String(localized: "quick_update_placeholder"),
-                text: binding(for: source)
-            )
-            .keyboardType(.decimalPad)
-            .multilineTextAlignment(.trailing)
-            .frame(width: 120)
-            .font(.subheadline)
         }
     }
 
@@ -93,13 +115,28 @@ struct QuickUpdateView: View {
         values.filter { !$0.value.trimmingCharacters(in: .whitespaces).isEmpty }
     }
 
-    private func binding(for source: InvestmentSource) -> Binding<String> {
+    private func valueBinding(for source: InvestmentSource) -> Binding<String> {
         Binding(
             get: { values[source.objectID] ?? "" },
             set: { values[source.objectID] = $0 }
         )
     }
 
+    private func contributionBinding(for source: InvestmentSource) -> Binding<String> {
+        Binding(
+            get: { contributions[source.objectID] ?? "" },
+            set: { contributions[source.objectID] = $0 }
+        )
+    }
+
+    private func prefillContributions() {
+        for source in sources {
+            if let amount = MonthlyContributionStore.contribution(for: source.id) {
+                contributions[source.objectID] = String(format: "%.2f", NSDecimalNumber(decimal: amount).doubleValue)
+            }
+        }
+    }
+
     private func saveAll() {
         isSaving = true
         let now = Date()
@@ -114,10 +151,20 @@ struct QuickUpdateView: View {
             snapshot.value = NSDecimalNumber(decimal: value)
             snapshot.date = now
             snapshot.source = source
+
+            if let contribRaw = contributions[source.objectID],
+               !contribRaw.trimmingCharacters(in: .whitespaces).isEmpty,
+               let contrib = CurrencyFormatter.parseUserInput(contribRaw) {
+                snapshot.contribution = NSDecimalNumber(decimal: contrib)
+            }
         }
 
         do {
             try context.save()
+            // Reschedule source reminders so they reflect the new snapshots
+            for source in sources where values[source.objectID].map({ !$0.isEmpty }) == true {
+                NotificationService.shared.scheduleReminder(for: source)
+            }
             dismiss()
         } catch {
             saveError = error.localizedDescription