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/LocationSearchSheet.swift

@@ -48,6 +48,7 @@ struct LocationSearchSheet: View {
                 HStack {
                     Image(systemName: "magnifyingglass")
                         .foregroundStyle(.secondary)
+                        .accessibilityHidden(true)
                     TextField("Search cities, addresses, places...", text: $searchText)
                         .textFieldStyle(.plain)
                         .autocorrectionDisabled()
@@ -61,6 +62,8 @@ struct LocationSearchSheet: View {
                             Image(systemName: "xmark.circle.fill")
                                 .foregroundStyle(.secondary)
                         }
+                        .minimumHitTarget()
+                        .accessibilityLabel("Clear search")
                     }
                 }
                 .padding()
@@ -85,6 +88,7 @@ struct LocationSearchSheet: View {
                                 Image(systemName: "mappin.circle.fill")
                                     .foregroundStyle(.red)
                                     .font(.title2)
+                                    .accessibilityHidden(true)
                                 VStack(alignment: .leading) {
                                     Text(result.name)
                                         .foregroundStyle(.primary)
@@ -97,6 +101,7 @@ struct LocationSearchSheet: View {
                                 Spacer()
                                 Image(systemName: "plus.circle")
                                     .foregroundStyle(.blue)
+                                    .accessibilityHidden(true)
                             }
                         }
                         .buttonStyle(.plain)