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/SceneDelegate.swift

@@ -6,7 +6,6 @@
 //
 
 import UIKit
-import CYLTabBarController
 
 /// 窗口 Scene 代理，负责创建根窗口并挂载会话协调器。
 class SceneDelegate: UIResponder, UIWindowSceneDelegate {
@@ -24,8 +23,6 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
     ) {
         guard let windowScene = scene as? UIWindowScene else { return }
 
-        MainScanPlusButton.register()
-
         AppUITestLaunchState.resetIfNeeded()
 
         let rootViewController = RootViewController()