Feedback #3 y #4: pegar/OCR por campo en Quick Update + swipe entre charts (build 60)

#3 Quick Update paste/scan por campo:
- Barra de teclado con 'Pegar €X' (si hay importe en portapapeles) y 'Escanear'
  (PhotosPicker → OCR on-device). Actúan sobre el campo enfocado.
- ImageAmountScanner nuevo (app target, Vision) espejo del scanner del Share
  Extension: candidatos rankeados por prominencia, filtra % y años.
- 1 candidato → rellena directo; varios → confirmationDialog para elegir.
- Strings ×7.

#4 Swipe entre charts (iPhone):
- Gesto horizontal en el área del chart avanza al chart anterior/siguiente en
  el orden del menú de título (respeta showForecast). Indicador de página con
  puntos. Transición direccional. selectChart ya no bloquea premium (muestra
  teaser), así que deslizar a uno premium funciona.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WoScpmHdVj1aUf4rAp6hbe

PortfolioJournal/Views/Dashboard/QuickUpdateView.swift

@@ -2,6 +2,7 @@ import SwiftUI
 import CoreData
 import TipKit
 import UIKit
+import PhotosUI
 
 struct QuickUpdateView: View {
     @Environment(\.dismiss) private var dismiss
@@ -24,6 +25,14 @@ struct QuickUpdateView: View {
     @State private var clipboardAmount: Decimal?
     @State private var lastSuggestedRaw: String?
 
+    // Per-field paste/scan (feedback #3): keyboard toolbar acts on the focused
+    // field — paste a clipboard amount or OCR a number from a screenshot.
+    @State private var photoItem: PhotosPickerItem?
+    @State private var showingPhotoPicker = false
+    @State private var scanCandidates: [ScannedAmount] = []
+    @State private var isScanning = false
+    @State private var scanTargetSource: NSManagedObjectID?
+
     /// First source (list order) still without a value — the "active" one.
     private var nextEmptySource: InvestmentSource? {
         sources.first { source in
@@ -100,6 +109,51 @@ struct QuickUpdateView: View {
                     .disabled(isSaving || filledValues.isEmpty)
                     .fontWeight(.semibold)
                 }
+                // Keyboard accessory: paste / scan for the focused field.
+                ToolbarItemGroup(placement: .keyboard) {
+                    if let clip = clipboardFieldAmount {
+                        Button {
+                            if let target = focusedSource { values[target] = decimalInputString(clip) }
+                        } label: {
+                            Label(String(format: String(localized: "quick_update_paste_value"), clip.currencyString),
+                                  systemImage: "doc.on.clipboard")
+                        }
+                    }
+                    Button {
+                        scanTargetSource = focusedSource
+                        showingPhotoPicker = true
+                    } label: {
+                        Label(String(localized: "quick_update_scan"), systemImage: "text.viewfinder")
+                    }
+                    Spacer()
+                    Button(String(localized: "quick_update_done_kbd")) { focusedSource = nil }
+                        .fontWeight(.semibold)
+                }
+            }
+            .photosPicker(isPresented: $showingPhotoPicker, selection: $photoItem, matching: .images)
+            .onChange(of: photoItem) { _, item in
+                guard let item else { return }
+                Task { await scanPickedPhoto(item) }
+            }
+            .overlay {
+                if isScanning {
+                    ZStack {
+                        Color.black.opacity(0.2).ignoresSafeArea()
+                        ProgressView(String(localized: "quick_update_scanning"))
+                            .padding(20)
+                            .background(.regularMaterial, in: RoundedRectangle(cornerRadius: 12))
+                    }
+                }
+            }
+            .confirmationDialog(
+                String(localized: "quick_update_pick_amount"),
+                isPresented: Binding(get: { scanCandidates.count > 1 }, set: { if !$0 { scanCandidates = [] } }),
+                titleVisibility: .visible
+            ) {
+                ForEach(scanCandidates) { c in
+                    Button(c.value.currencyString) { applyScanned(c.value) }
+                }
+                Button(String(localized: "cancel"), role: .cancel) { scanCandidates = [] }
             }
             .alert("Error", isPresented: Binding(
                 get: { saveError != nil },
@@ -119,6 +173,45 @@ struct QuickUpdateView: View {
         }
     }
 
+    /// Clipboard amount for the keyboard toolbar (independent of the top banner's
+    /// one-shot suggestion state).
+    private var clipboardFieldAmount: Decimal? {
+        guard let raw = UIPasteboard.general.string,
+              let parsed = CurrencyFormatter.parseUserInput(raw), parsed > 0 else { return nil }
+        return parsed
+    }
+
+    private func decimalInputString(_ value: Decimal) -> String {
+        String(format: "%.2f", NSDecimalNumber(decimal: value).doubleValue)
+    }
+
+    private func applyScanned(_ value: Decimal) {
+        if let target = scanTargetSource ?? focusedSource {
+            values[target] = decimalInputString(value)
+        }
+        scanCandidates = []
+    }
+
+    @MainActor
+    private func scanPickedPhoto(_ item: PhotosPickerItem) async {
+        isScanning = true
+        defer { photoItem = nil }
+        guard let data = try? await item.loadTransferable(type: Data.self),
+              let image = UIImage(data: data) else { isScanning = false; return }
+        ImageAmountScanner.scan(image) { candidates in
+            DispatchQueue.main.async {
+                isScanning = false
+                if candidates.count == 1 {
+                    applyScanned(candidates[0].value)
+                } else if candidates.count > 1 {
+                    scanCandidates = candidates
+                } else {
+                    saveError = String(localized: "quick_update_no_amount_found")
+                }
+            }
+        }
+    }
+
     @ViewBuilder
     private func sourceRow(_ source: InvestmentSource) -> some View {
         VStack(spacing: 6) {