Fix widget layout clipping and add comprehensive widget previews

- Fix LargeVotingView mood icons getting clipped at edges by using
  flexible HStack spacing with maxWidth: .infinity
- Fix VotingView medium layout with smaller icons and even distribution
- Add comprehensive #Preview macros for all widget states:
  - Vote widget: small/medium, voted/not voted, all mood states
  - Timeline widget: small/medium/large with various data states
- Reduce icon sizes and padding to fit within widget bounds
- Update accessibility labels and hints across views

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

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

Shared/Onboarding/views/OnboardingTime.swift

@@ -36,21 +36,21 @@ struct OnboardingTime: View {
                         .frame(width: 120, height: 120)
 
                     Image(systemName: "bell.fill")
-                        .font(.system(size: 44))
+                        .font(.largeTitle)
                         .foregroundColor(.white)
                 }
                 .padding(.bottom, 32)
 
                 // Title
                 Text("When should we\nremind you?")
-                    .font(.system(size: 28, weight: .bold, design: .rounded))
+                    .font(.title.weight(.bold))
                     .foregroundColor(.white)
                     .multilineTextAlignment(.center)
                     .padding(.bottom, 12)
 
                 // Subtitle
                 Text("Pick a time that works for your daily check-in")
-                    .font(.system(size: 16, weight: .medium))
+                    .font(.body.weight(.medium))
                     .foregroundColor(.white.opacity(0.85))
                     .multilineTextAlignment(.center)
                     .padding(.horizontal, 40)
@@ -80,12 +80,12 @@ struct OnboardingTime: View {
                 // Info text
                 HStack(spacing: 12) {
                     Image(systemName: "info.circle.fill")
-                        .font(.system(size: 20))
+                        .font(.title3)
                         .foregroundColor(.white.opacity(0.8))
                         .accessibilityHidden(true)
 
                     Text("You'll get a gentle reminder at \(formatter.string(from: onboardingData.date)) every day")
-                        .font(.system(size: 14, weight: .medium))
+                        .font(.subheadline.weight(.medium))
                         .foregroundColor(.white.opacity(0.9))
                 }
                 .padding(.horizontal, 30)