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>

SportsTimeUITests/SportsTimeUITests.swift

@@ -18,6 +18,28 @@ final class SportsTimeUITests: XCTestCase {
         // Put teardown code here.
     }
 
+    // MARK: - Accessibility Smoke Tests
+
+    /// Verifies primary entry flow remains usable at a large accessibility text size.
+    @MainActor
+    func testAccessibilitySmoke_LargeDynamicTypeEntryFlow() throws {
+        let app = XCUIApplication()
+        app.launchArguments = [
+            "-UIPreferredContentSizeCategoryName",
+            "UICTContentSizeCategoryAccessibilityXXXL"
+        ]
+        app.launch()
+
+        let startPlanningButton = app.buttons["home.startPlanningButton"]
+        XCTAssertTrue(startPlanningButton.waitForExistence(timeout: 20), "Start Planning should exist at large Dynamic Type")
+        XCTAssertTrue(startPlanningButton.isHittable, "Start Planning should remain hittable at large Dynamic Type")
+        startPlanningButton.tap()
+
+        let dateRangeMode = app.buttons["wizard.planningMode.dateRange"]
+        XCTAssertTrue(dateRangeMode.waitForExistence(timeout: 10), "Planning mode options should load")
+        XCTAssertTrue(dateRangeMode.isHittable, "Planning mode option should remain hittable at large Dynamic Type")
+    }
+
     // MARK: - Demo Flow Test (Continuous Scroll Mode)
 
     /// Complete trip planning demo with continuous smooth scrolling.