Share cards 2.0: dark panorama + privacidad + Story + atribución (build 82) #34

Rediseño de las cards de compartir con el sistema visual de las screenshots
ASO: fondo navy con glows y grid, sparkline de evolución con gradiente
azul→cian y punto final, chip de delta, footer con marca + QR. Aplica a
Portfolio Snapshot, Monthly Check-in y Monthly Summary.

Potencia referral: sheet de opciones previo con preview en vivo
(PortfolioShareOptionsView) — toggle «Solo porcentajes» (sin importes
absolutos, la fricción #1 para compartir) y formato Post/Story 9:16. QR y
link con ?ct=snapshot_share para atribución en App Analytics. Analytics:
share type portfolio_value_percent. L10n ×7.

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

PortfolioJournal/Views/Dashboard/DashboardView.swift

@@ -17,6 +17,7 @@ struct DashboardView: View {
     @AppStorage("showForecast") private var showForecast = true
     @State private var showingQuickUpdate = false
     @State private var showingDataGaps = false
+    @State private var showingShareOptions = false
     /// Signature of the gap set last dismissed, so re-dismissal sticks until the
     /// gaps actually change (e.g. the user filled some).
     @AppStorage("dismissedDataGapsSignature") private var dismissedGapsSignature = ""
@@ -146,6 +147,17 @@ struct DashboardView: View {
             .sheet(isPresented: $viewModel.showingPaywall) {
                 PaywallView()
             }
+            .sheet(isPresented: $showingShareOptions) {
+                PortfolioShareOptionsView(
+                    totalValue: viewModel.portfolioSummary.formattedTotalValue,
+                    changeText: "\(viewModel.latestPortfolioChange.formattedAbsolute) (\(viewModel.latestPortfolioChange.formattedPercentage))",
+                    changeLabel: "since last check-in",
+                    yearChange: viewModel.portfolioSummary.formattedYearChange,
+                    sinceInceptionChange: viewModel.portfolioSummary.formattedAllTimeReturn,
+                    sparkline: viewModel.evolutionData.map { NSDecimalNumber(decimal: $0.value).doubleValue },
+                    isPositive: viewModel.latestPortfolioChange.absolute >= 0
+                )
+            }
             .sheet(isPresented: $showingDataGaps) {
                 DataGapsSheet(
                     gaps: viewModel.dataGaps,
@@ -313,13 +325,7 @@ struct DashboardView: View {
                     isYearPositive: viewModel.isYearChangePositive,
                     isSinceInceptionPositive: viewModel.portfolioSummary.allTimeReturn >= 0,
                     onShareTap: {
-                        ShareService.shared.sharePortfolioValue(
-                            totalValue: viewModel.portfolioSummary.formattedTotalValue,
-                            changeText: "\(viewModel.latestPortfolioChange.formattedAbsolute) (\(viewModel.latestPortfolioChange.formattedPercentage))",
-                            changeLabel: "since last check-in",
-                            yearChange: viewModel.portfolioSummary.formattedYearChange,
-                            sinceInceptionChange: viewModel.portfolioSummary.formattedAllTimeReturn
-                        )
+                        showingShareOptions = true
                     },
                     sparklineData: viewModel.evolutionData,
                     balancesHidden: balancePrivacy.balancesHidden