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/YearView/YearView.swift

@@ -64,27 +64,42 @@ struct YearView: View {
                         }
                     )
                 }
-                .disabled(iapManager.shouldShowPaywall)
+                .scrollDisabled(iapManager.shouldShowPaywall)
+                .mask(
+                    // Fade effect when paywall should show: 100% at top, 0% at bottom
+                    iapManager.shouldShowPaywall ?
+                    AnyView(
+                        LinearGradient(
+                            gradient: Gradient(stops: [
+                                .init(color: .black, location: 0),
+                                .init(color: .black, location: 0.3),
+                                .init(color: .clear, location: 1.0)
+                            ]),
+                            startPoint: .top,
+                            endPoint: .bottom
+                        )
+                    ) : AnyView(Color.black)
+                )
             }
 
             if iapManager.shouldShowPaywall {
-                Color.black.opacity(0.3)
-                    .ignoresSafeArea()
-                    .onTapGesture {
-                        showSubscriptionStore = true
-                    }
-
                 VStack {
                     Spacer()
-                    Button {
-                        showSubscriptionStore = true
-                    } label: {
-                        Text(String(localized: "subscription_required_button"))
+                    VStack(spacing: 16) {
+                        Text("Subscribe to see your full year")
                             .font(.headline)
-                            .foregroundColor(.white)
-                            .frame(maxWidth: .infinity)
-                            .padding()
-                            .background(RoundedRectangle(cornerRadius: 10).fill(Color.pink))
+                            .foregroundColor(textColor)
+
+                        Button {
+                            showSubscriptionStore = true
+                        } label: {
+                            Text(String(localized: "subscription_required_button"))
+                                .font(.headline)
+                                .foregroundColor(.white)
+                                .frame(maxWidth: .infinity)
+                                .padding()
+                                .background(RoundedRectangle(cornerRadius: 10).fill(Color.pink))
+                        }
                     }
                     .padding()
                 }