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/AddItem/PlaceSearchSheet.swift

@@ -64,6 +64,7 @@ struct PlaceSearchSheet: View {
         HStack(spacing: Theme.Spacing.sm) {
             Image(systemName: "magnifyingglass")
                 .foregroundStyle(Theme.textMuted(colorScheme))
+                .accessibilityHidden(true)
 
             TextField(searchPlaceholder, text: $searchQuery)
                 .textFieldStyle(.plain)
@@ -82,6 +83,7 @@ struct PlaceSearchSheet: View {
                     Image(systemName: "xmark.circle.fill")
                         .foregroundStyle(Theme.textMuted(colorScheme))
                 }
+                .minimumHitTarget()
                 .accessibilityLabel("Clear search")
             }
         }
@@ -148,6 +150,7 @@ struct PlaceSearchSheet: View {
             Image(systemName: "mappin.slash")
                 .font(.largeTitle)
                 .foregroundStyle(Theme.textMuted(colorScheme))
+                .accessibilityHidden(true)
 
             Text("No places found")
                 .font(.headline)
@@ -180,6 +183,7 @@ struct PlaceSearchSheet: View {
             Image(systemName: "exclamationmark.triangle")
                 .font(.largeTitle)
                 .foregroundStyle(.orange)
+                .accessibilityHidden(true)
 
             Text("Search unavailable")
                 .font(.headline)