Replace CYLTabBarController with native UITabBarController for main tabs.

Use a system scan tab slot with MainScanTabItem interception so scanner presentation no longer depends on CYL PlusButton, and remove the CYLTabBarController pod dependency.

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

suixinkan_ios/Features/Main/Views/MainScanPlusButton.swift

@@ -1,87 +0,0 @@
-//
-//  MainScanPlusButton.swift
-//  suixinkan
-//
-
-import CYLTabBarController
-import UIKit
-
-@MainActor
-@objcMembers
-/// 主 TabBar 中间扫码核销按钮，基于 CYLTabBarController 的 PlusButton 机制实现。
-final class MainScanPlusButton: CYLPlusButton, CYLPlusButtonSubclassing {
-
-    /// 点击扫码按钮时的回调，由 `MainTabBarController` 注入。
-    static var onScanTap: (() -> Void)?
-
-    /// 构建中间扫码按钮实例，供 CYLTabBarController 注册使用。
-    static func plusButton() -> Any {
-        let button = MainScanPlusButton()
-        button.setImage(UIImage(named: "icon_scan"), for: .normal)
-        button.titleLabel?.textAlignment = .center
-
-        button.titleLabel?.font = UIFont.systemFont(ofSize: 10)
-        
-        button.setTitle("发布", for: .normal)
-        button.setTitleColor(UIColor.gray, for: .normal)
-        
-        button.setTitle("选中", for: .selected)
-        button.setTitleColor(UIColor(red:255.0/255.0,green:102.0/255.0,blue:0,alpha:1.0), for: .selected)
-        
-        button.adjustsImageWhenHighlighted = false
-        button.sizeToFit()
-        return button
-    }
-
-    /// 指定扫码按钮在 TabBar 中的视觉槽位（位于订单与数据之间）。
-    static func indexOfPlusButtonInTabBar() -> UInt {
-        2
-    }
-
-    /// 调整扫码按钮垂直位置，使其略微凸出 TabBar 顶部。
-    static func constantOfPlusButtonCenterYOffset(forTabBarHeight tabBarHeight: CGFloat) -> CGFloat {
-        -6
-    }
-
-    /// 配置圆形背景与扫码图标，对齐参考工程 CustomMainTabBarCenterAction。
-    private func configureAppearance() {
-        backgroundColor = .clear
-
-        let circleSize: CGFloat = 58
-        let circleView = UIView()
-        circleView.isUserInteractionEnabled = false
-        circleView.backgroundColor = AppDesign.primary
-        circleView.layer.cornerRadius = circleSize / 2
-        addSubview(circleView)
-
-        let symbolConfig = UIImage.SymbolConfiguration(pointSize: 30, weight: .bold)
-        let iconView = UIImageView(
-            image: UIImage(named: "icon_scan")
-        )
-        iconView.tintColor = .white
-        iconView.contentMode = .scaleAspectFit
-        iconView.isUserInteractionEnabled = false
-        addSubview(iconView)
-
-        circleView.translatesAutoresizingMaskIntoConstraints = false
-        iconView.translatesAutoresizingMaskIntoConstraints = false
-        NSLayoutConstraint.activate([
-            circleView.centerXAnchor.constraint(equalTo: centerXAnchor),
-            circleView.centerYAnchor.constraint(equalTo: centerYAnchor),
-            circleView.widthAnchor.constraint(equalToConstant: circleSize),
-            circleView.heightAnchor.constraint(equalToConstant: circleSize),
-            iconView.centerXAnchor.constraint(equalTo: circleView.centerXAnchor),
-            iconView.centerYAnchor.constraint(equalTo: circleView.centerYAnchor),
-            iconView.widthAnchor.constraint(equalToConstant: 30),
-            iconView.heightAnchor.constraint(equalToConstant: 30)
-        ])
-
-        accessibilityLabel = "扫码核销"
-        accessibilityIdentifier = "main.scan"
-    }
-
-    /// 响应用户点击，触发全局扫码流程。
-    @objc private func handleScanTap() {
-        Self.onScanTap?()
-    }
-}

suixinkan_ios/Features/Main/Views/MainScanTabItem.swift

@@ -0,0 +1,21 @@
+//
+//  MainScanTabItem.swift
+//  suixinkan
+//
+
+import UIKit
+
+@MainActor
+/// 主 TabBar 中间扫码核销入口，负责构建系统 TabBarItem。
+enum MainScanTabItem {
+
+    /// 构建系统扫码 TabBarItem，点击行为由 `MainTabBarController` 拦截处理。
+    static func makeTabBarItem() -> UITabBarItem {
+        let image = UIImage(named: "icon_scan")?.withRenderingMode(.alwaysOriginal)
+        let selectedImage = UIImage(named: "icon_scan")?.withRenderingMode(.alwaysOriginal)
+        let item = UITabBarItem(title: "扫码", image: image, selectedImage: selectedImage)
+        item.accessibilityLabel = "扫码核销"
+        item.accessibilityIdentifier = "main.scan"
+        return item
+    }
+}