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/SportsTimeApp.swift

@@ -238,16 +238,15 @@ struct BootstrappedContentView: View {
     private func performBackgroundSync(context: ModelContext) async {
         let log = SyncLogger.shared
         log.log("🔄 [SYNC] Starting background sync...")
+        AccessibilityAnnouncer.announce("Sync started.")
 
         // Log diagnostic info for debugging CloudKit container issues
         let bundleId = Bundle.main.bundleIdentifier ?? "unknown"
-        let container = CKContainer.default()
+        let container = CloudKitContainerConfig.makeContainer()
         let containerId = container.containerIdentifier ?? "unknown"
         log.log("🔧 [DIAG] Bundle ID: \(bundleId)")
-        log.log("🔧 [DIAG] CKContainer.default(): \(containerId)")
-        if let entitlementContainers = Bundle.main.object(forInfoDictionaryKey: "com.apple.developer.icloud-container-identifiers") as? [String] {
-            log.log("🔧 [DIAG] Entitlement containers: \(entitlementContainers.joined(separator: ", "))")
-        }
+        log.log("🔧 [DIAG] CloudKit container: \(containerId)")
+        log.log("🔧 [DIAG] Configured container: \(CloudKitContainerConfig.identifier)")
         if let accountStatus = try? await container.accountStatus() {
             log.log("🔧 [DIAG] iCloud account status: \(accountStatus.rawValue) (0=couldNotDetermine, 1=available, 2=restricted, 3=noAccount)")
         } else {
@@ -294,10 +293,13 @@ struct BootstrappedContentView: View {
             } else {
                 log.log("🔄 [SYNC] No updates - skipping DataProvider reload")
             }
+            AccessibilityAnnouncer.announce("Sync complete. Updated \(result.totalUpdated) records.")
         } catch CanonicalSyncService.SyncError.cloudKitUnavailable {
             log.log("❌ [SYNC] CloudKit unavailable - using local data only")
+            AccessibilityAnnouncer.announce("Cloud sync unavailable. Using local data.")
         } catch {
             log.log("❌ [SYNC] Error: \(error.localizedDescription)")
+            AccessibilityAnnouncer.announce("Sync failed. \(error.localizedDescription)")
         }
     }