Calm 2.0 Fase 4: TipKit para descubrimiento + aha post-onboarding (build 55)

TipKit (Tips.configure con frecuencia diaria):
- QuickUpdateTip: popover en el '+' del Home — descubre Quick Update
- ScreenshotOCRTip: inline en Quick Update — descubre el OCR por captura
- SiriTip: en el cierre del check-in guiado — descubre el intent de voz
- ChartShareTip: popover en el compartir de Charts
- Se invalidan al ejecutar la acción; máx 1-2 impresiones cada uno
- Strings ×7 idiomas

Onboarding:
- Al completar el onboarding sin datos, se abre Add Source directamente
  (notificación .openAddFirstSource) — el usuario nuevo no aterriza en un
  dashboard vacío

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

PortfolioJournal/Resources/en.lproj/Localizable.strings

@@ -512,3 +512,13 @@
 "whats_new_141_icloud_title" = "More in sync";
 "whats_new_141_icloud_body" = "Monthly contributions and allocation targets now sync across your devices via iCloud.";
 "whats_new_title_format" = "What's New in %@";
+
+// TipKit (1.5.0 Fase 4)
+"tip_quick_update_title" = "Update everything in seconds";
+"tip_quick_update_body" = "Quick Update lists all your sources in one screen — paste values from your clipboard and go.";
+"tip_ocr_title" = "Or just share a screenshot";
+"tip_ocr_body" = "From your bank app: screenshot → Share → Portfolio Journal. The balance is read on-device.";
+"tip_siri_title" = "Next time, try your voice";
+"tip_siri_body" = "Say \"Log my account balance in Portfolio Journal\" to Siri — no need to open the app.";
+"tip_chart_share_title" = "Share this chart";
+"tip_chart_share_body" = "Renders a beautiful image with your data, ready for X or WhatsApp.";