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/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)
             }