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>

Podfile

@@ -5,7 +5,6 @@ target 'suixinkan_ios' do
 
   pod 'SnapKit', '~> 5.7'
   pod 'Kingfisher', '~> 8.0'
-  pod 'CYLTabBarController', '~> 1.99.38'
 
   # 高德地图 SDK 仅支持真机；模拟器通过下方 post_install 剥离链接
   pod 'AMap3DMap-NO-IDFA', '~> 11.1'
@@ -20,7 +19,7 @@ end
 # 模拟器构建时不链接高德（真机专用 framework），仅保留通用 Pod 依赖
 SIMULATOR_OTHER_LDFLAGS = <<~FLAGS.squish
   -ObjC -l"c++" -l"swiftCoreGraphics" -l"z"
-  -framework "Accelerate" -framework "CFNetwork" -framework "CYLTabBarController"
+  -framework "Accelerate" -framework "CFNetwork"
   -framework "Kingfisher" -framework "SnapKit"
   -framework "CoreGraphics" -framework "CoreLocation" -framework "CoreTelephony"
   -framework "CoreText" -framework "ExternalAccessory" -framework "GLKit"