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/Features/Trip/Views/Wizard/Steps/RepeatCitiesStep.swift

@@ -72,6 +72,7 @@ private struct OptionButton: View {
                 Image(systemName: icon)
                     .font(.title2)
                     .foregroundStyle(isSelected ? Theme.warmOrange : Theme.textSecondary(colorScheme))
+                    .accessibilityHidden(true)
 
                 Text(title)
                     .font(.caption)
@@ -90,6 +91,8 @@ private struct OptionButton: View {
             )
         }
         .buttonStyle(.plain)
+        .accessibilityValue(isSelected ? "Selected" : "Not selected")
+        .accessibilityAddTraits(isSelected ? .isSelected : [])
     }
 }