Ensure full Spanish localization for all 1.2.0 strings

- OnboardingView: wrap page titles/descriptions with String(localized:)
  using symbolic keys so SwiftUI can look them up correctly
- IAPService.paywallBenefits: change from static let to static var,
  wrap all strings with String(localized:) using symbolic keys
- en.lproj: add symbolic keys for new onboarding pages and paywall benefits
- es-ES.lproj: add Spanish translations for all new keys (onboarding pages,
  paywall benefits, batch update, contribution fields) plus pre-existing
  gaps (Monthly Highlights, Best/Worst Performer, Best Contributor)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

PortfolioJournal/Resources/en.lproj/Localizable.strings

@@ -112,6 +112,16 @@
 "feature_no_ads" = "No Ads";
 "feature_no_ads_desc" = "Ad-free experience forever";
 
+// Paywall benefits (1.2.0)
+"paywall_benefit_history_title" = "Your complete history";
+"paywall_benefit_history_subtitle" = "Every snapshot, contribution, and gain since day one";
+"paywall_benefit_charts_title" = "Charts that reveal patterns";
+"paywall_benefit_charts_subtitle" = "Allocation, drawdown, performance — all in one place";
+"paywall_benefit_forecasts_title" = "12-month forecasts";
+"paywall_benefit_forecasts_subtitle" = "See where your portfolio is likely heading";
+"paywall_benefit_noads_title" = "No ads, ever";
+"paywall_benefit_noads_subtitle" = "Clean, focused experience with no distractions";
+
 // MARK: - Settings
 "settings_title" = "Settings";
 "subscription" = "Subscription";
@@ -177,6 +187,16 @@
 "onboarding_sync_desc" = "Your data syncs automatically via iCloud across all your Apple devices.";
 "get_started" = "Get Started";
 
+// Onboarding pages (1.2.0)
+"onboarding_clarity_title" = "Know exactly where you stand";
+"onboarding_clarity_desc" = "See your total wealth, real returns, and allocation — always up to date.";
+"onboarding_habit_title" = "5 minutes a month is enough";
+"onboarding_habit_desc" = "Log your values once a month. Portfolio Journal handles the math and shows your progress.";
+"onboarding_calm_title" = "Ignore the noise. Track the trend.";
+"onboarding_calm_desc" = "Daily swings don't tell the real story. Your growth over months and years does.";
+"onboarding_goals_title" = "Reach your financial goals";
+"onboarding_goals_desc" = "Set targets, track milestones, and see exactly how far you've come.";
+
 // MARK: - Errors
 "error_generic" = "An error occurred. Please try again.";
 "error_no_purchases" = "No purchases found to restore";

PortfolioJournal/Resources/es-ES.lproj/Localizable.strings

@@ -137,6 +137,26 @@
 "Unlimited sources, advanced charts & more" = "Fuentes ilimitadas, gráficos avanzados y más";
 "See full access" = "Ver acceso completo";
 
+// Paywall benefits (1.2.0)
+"paywall_benefit_history_title" = "Tu historial completo";
+"paywall_benefit_history_subtitle" = "Cada snapshot, aportación y ganancia desde el primer día";
+"paywall_benefit_charts_title" = "Gráficos que revelan patrones";
+"paywall_benefit_charts_subtitle" = "Asignación, drawdown, rendimiento — todo en un lugar";
+"paywall_benefit_forecasts_title" = "Previsiones a 12 meses";
+"paywall_benefit_forecasts_subtitle" = "Ve a dónde se dirige tu cartera";
+"paywall_benefit_noads_title" = "Sin anuncios, nunca";
+"paywall_benefit_noads_subtitle" = "Una experiencia limpia y sin distracciones";
+
+// MARK: - Onboarding pages (1.2.0)
+"onboarding_clarity_title" = "Sabe exactamente dónde estás";
+"onboarding_clarity_desc" = "Consulta tu patrimonio total, rendimientos reales y distribución — siempre actualizado.";
+"onboarding_habit_title" = "5 minutos al mes son suficientes";
+"onboarding_habit_desc" = "Registra tus valores una vez al mes. Portfolio Journal hace los cálculos y muestra tu progreso.";
+"onboarding_calm_title" = "Ignora el ruido. Sigue la tendencia.";
+"onboarding_calm_desc" = "Las variaciones diarias no cuentan la historia real. Tu crecimiento en meses y años sí.";
+"onboarding_goals_title" = "Alcanza tus metas financieras";
+"onboarding_goals_desc" = "Define objetivos, sigue los hitos y ve exactamente hasta dónde has llegado.";
+
 // MARK: - Batch Update (1.2.0)
 "Batch Update" = "Actualización en bloque";
 "Current value" = "Valor actual";
@@ -147,3 +167,11 @@
 "New capital added" = "Capital nuevo añadido";
 "Contribution (Optional)" = "Aportación (opcional)";
 "Track new capital added to separate it from investment growth." = "Registra el capital nuevo para separarlo del crecimiento de la inversión.";
+
+// MARK: - Monthly Highlights (pre-existing gaps)
+"Monthly Highlights" = "Aspectos destacados del mes";
+"Best Performer" = "Mejor rendimiento";
+"Worst Performer" = "Peor rendimiento";
+"Best Contributor" = "Mayor aportador";
+"Update Check-in" = "Actualizar chequeo";
+"Completed %@" = "Completado %@";