feat: add WCAG AA accessibility app-wide, fix CloudKit container config, remove debug logs

- Add VoiceOver labels, hints, and element grouping across all 60+ views
- Add Reduce Motion support (Theme.Animation.prefersReducedMotion) to all animations
- Replace fixed font sizes with semantic Dynamic Type styles
- Hide decorative elements from VoiceOver with .accessibilityHidden(true)
- Add .minimumHitTarget() modifier ensuring 44pt touch targets
- Add AccessibilityAnnouncer utility for VoiceOver announcements
- Improve color contrast values in Theme.swift for WCAG AA compliance
- Extract CloudKitContainerConfig for explicit container identity
- Remove PostHog debug console log from AnalyticsManager

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

SportsTime/Export/Views/ShareButton.swift

@@ -25,6 +25,7 @@ struct ShareButton<Content: ShareableContent>: View {
             switch style {
             case .icon:
                 Image(systemName: "square.and.arrow.up")
+                    .accessibilityLabel("Share")
             case .labeled:
                 Label("Share", systemImage: "square.and.arrow.up")
             case .pill: