Move vote animation to Customize tab as persistent user setting

Replace random animation selection with a user-configurable picker on
the Customize tab between Mood Style and Notifications. Confetti is
the default. Selecting a style shows an inline preview that auto-plays
the animation then dismisses itself. Remove Animation Lab from Settings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Shared/Views/AddMoodHeaderView.swift

@@ -14,6 +14,7 @@ struct AddMoodHeaderView: View {
     @AppStorage(UserDefaultsStore.Keys.moodImages.rawValue, store: GroupUserDefaults.groupDefaults) private var imagePack: MoodImages = .FontAwesome
     @AppStorage(UserDefaultsStore.Keys.moodTint.rawValue, store: GroupUserDefaults.groupDefaults) private var moodTint: MoodTints = .Default
     @AppStorage(UserDefaultsStore.Keys.votingLayoutStyle.rawValue, store: GroupUserDefaults.groupDefaults) private var votingLayoutStyle: Int = 0
+    @AppStorage(UserDefaultsStore.Keys.celebrationAnimation.rawValue, store: GroupUserDefaults.groupDefaults) private var celebrationAnimationIndex: Int = 0
 
     private var textColor: Color { theme.currentTheme.labelColor }
 
@@ -92,10 +93,10 @@ struct AddMoodHeaderView: View {
         let impactFeedback = UIImpactFeedbackGenerator(style: .medium)
         impactFeedback.impactOccurred()
 
-        // Store mood, date, and pick random animation
+        // Store mood, date, and use saved animation preference
         celebrationMood = mood
         celebrationDate = ShowBasedOnVoteLogics.getCurrentVotingDate(onboardingData: onboardingData)
-        celebrationAnimation = .random
+        celebrationAnimation = CelebrationAnimationType.fromIndex(celebrationAnimationIndex)
 
         // Show celebration - mood will be saved when animation completes
         withAnimation(.easeInOut(duration: 0.3)) {