Introduce unified design tokens and migrate Home, Orders, and Statistics UI.

Establish AppColor/AppFont/AppSpacing/AppRadius theming, shared components, and design-system docs so pilot screens align with Android while keeping iOS-native spacing and touch targets.

Co-authored-by: Cursor <cursoragent@cursor.com>

suixinkan/UI/Statistics/StatisticsDailyListView.swift

@@ -47,27 +47,27 @@ final class StatisticsDailyListView: UIView {
     }
 
     private func setupUI() {
-        backgroundColor = .white
-        layer.cornerRadius = 12
+        backgroundColor = AppColor.cardBackground
+        layer.cornerRadius = AppRadius.lg
         clipsToBounds = true
 
         titleLabel.text = "时间范围"
-        titleLabel.font = .systemFont(ofSize: 14, weight: .bold)
-        titleLabel.textColor = .black
+        titleLabel.font = .app(.bodyMedium)
+        titleLabel.textColor = AppColor.textPrimary
 
-        rangeButton.backgroundColor = UIColor(hex: 0xF4F4F4)
-        rangeButton.layer.cornerRadius = 4
+        rangeButton.backgroundColor = AppColor.inputBackground
+        rangeButton.layer.cornerRadius = AppRadius.xs
         rangeButton.addTarget(self, action: #selector(rangeTapped), for: .touchUpInside)
 
-        rangeLabel.font = .systemFont(ofSize: 14)
-        rangeLabel.textColor = UIColor(hex: 0x4B5563)
+        rangeLabel.font = .app(.body)
+        rangeLabel.textColor = AppColor.textSecondary
         rangeLabel.text = "今日"
 
         arrowView.image = UIImage(systemName: "chevron.down")
-        arrowView.tintColor = UIColor(hex: 0x4B5563)
+        arrowView.tintColor = AppColor.textSecondary
         arrowView.contentMode = .scaleAspectFit
 
-        divider.backgroundColor = UIColor(hex: 0xF4F4F4)
+        divider.backgroundColor = AppColor.inputBackground
 
         tableView.backgroundColor = .clear
         tableView.separatorStyle = .none