Add comprehensive WCAG 2.1 AA accessibility support

- Add VoiceOver labels and hints to all voting layouts, settings, widgets,
  onboarding screens, and entry cells
- Add Reduce Motion support to button animations throughout the app
- Ensure 44x44pt minimum touch targets on widget mood buttons
- Enhance AccessibilityHelpers with Dynamic Type support, ScaledValue wrapper,
  and VoiceOver detection utilities
- Gate premium features (Insights, Month/Year views) behind subscription
- Update widgets to show subscription prompts for non-subscribers

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

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

Shared/Views/DayView/DayView.swift

@@ -174,6 +174,7 @@ extension DayView {
             Image(systemName: "calendar")
                 .font(.system(size: 16, weight: .semibold))
                 .foregroundColor(textColor.opacity(0.6))
+                .accessibilityHidden(true)
 
             Text("\(Random.monthName(fromMonthInt: month)) \(String(year))")
                 .font(.system(size: 20, weight: .bold, design: .rounded))
@@ -184,6 +185,9 @@ extension DayView {
         .padding(.horizontal, 16)
         .padding(.vertical, 14)
         .background(.ultraThinMaterial)
+        .accessibilityElement(children: .combine)
+        .accessibilityLabel(String(localized: "\(Random.monthName(fromMonthInt: month)) \(String(year))"))
+        .accessibilityAddTraits(.isHeader)
     }
 
     private func auraSectionHeader(month: Int, year: Int) -> some View {

Shared/Views/DayView/DayViewViewModel.swift

@@ -67,11 +67,12 @@ class DayViewViewModel: ObservableObject {
             return
         }
 
-        // Sync to HealthKit for past day updates
+        // Sync to HealthKit for past day updates (only if user has full access)
         guard mood != .missing && mood != .placeholder else { return }
 
         let healthKitEnabled = GroupUserDefaults.groupDefaults.bool(forKey: UserDefaultsStore.Keys.healthKitEnabled.rawValue)
-        if healthKitEnabled {
+        let hasAccess = !IAPManager.shared.shouldShowPaywall
+        if healthKitEnabled && hasAccess {
             Task {
                 try? await HealthKitManager.shared.saveMood(mood, for: entry.forDate)
             }