Add Insights tab with 60+ randomized analytics

New Insights tab between Year and Customize with:
- 20 insight generators producing 60+ unique insights
- 5 random insights selected per section (month, year, all-time)
- Categories: dominant mood, streaks, trends, positivity score,
  weekend vs weekday, mood swings, milestones, patterns, and more
- Collapsible sections with mood-colored cards
- Subscription paywall support
- English and Spanish localization

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Shared/FeelsApp.swift

@@ -34,8 +34,9 @@ struct FeelsApp: App {
             // build these here so when tints and other things get updated the views / their data dont
             // have to get redrawn#imageLiteral(resourceName: "simulator_screenshot_0017B4DC-100B-42A3-A406-9019704AE275.png")
             MainTabView(dayView: DayView(viewModel: DayViewViewModel(addMonthStartWeekdayPadding: false)),
-                        monthView:  MonthView(viewModel: DayViewViewModel(addMonthStartWeekdayPadding: true)),
+                        monthView: MonthView(viewModel: DayViewViewModel(addMonthStartWeekdayPadding: true)),
                         yearView: YearView(viewModel: YearViewModel()),
+                        insightsView: InsightsView(),
                         customizeView: CustomizeView())
             .environment(\.managedObjectContext, persistenceController.viewContext)
             .environmentObject(iapManager)