Integrate CYLTabBar center scan button and unify UIKit navigation.

Add CYLTabBarController with a global scan entry, promote MainTabBarController to the window root after login, replace RouterPath-based navigation with AppNavigator, and fix Profile diffable cell reconfiguration crashes.

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

suixinkan_ios/SceneDelegate.swift

@@ -7,11 +7,14 @@
 
 import UIKit
 
-/// 窗口 Scene 代理，负责创建根窗口并挂载 `RootViewController`。
+/// 窗口 Scene 代理，负责创建根窗口并挂载会话协调器。
 class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 
     var window: UIWindow?
 
+    /// 持有会话协调器，确保登录后切换 window 根控制器时仍能响应登出等阶段变化。
+    private var sessionRootController: RootViewController?
+
     /// Scene 连接时初始化窗口、重置 UI 测试状态并展示根控制器。
     func scene(
         _ scene: UIScene,
@@ -22,8 +25,11 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 
         AppUITestLaunchState.resetIfNeeded()
 
+        let rootViewController = RootViewController()
+        sessionRootController = rootViewController
+
         let window = UIWindow(windowScene: windowScene)
-        window.rootViewController = RootViewController()
+        window.rootViewController = rootViewController
         window.makeKeyAndVisible()
         self.window = window
     }