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/App/State/AuthSessionCoordinator.swift

@@ -124,7 +124,7 @@ final class AuthSessionCoordinator {
         accountContext: AccountContext,
         permissionContext: PermissionContext,
         scenicSpotContext: ScenicSpotContext,
-        appRouter: AppRouter,
+        appNavigator: AppNavigator,
         toastCenter: ToastCenter
     ) {
         try? tokenStore.clear()
@@ -132,7 +132,8 @@ final class AuthSessionCoordinator {
         accountContext.reset()
         permissionContext.reset()
         scenicSpotContext.reset()
-        appRouter.reset()
+        appNavigator.resetAllStacks()
+        appNavigator.detach()
         toastCenter.dismiss()
         appSession.logout()
     }