Fix TabBar icon assets and simplify Podfile post_install.

Rename tab icons to snake_case with @2x/@3x scales, register CYL plus button at app launch, and remove redundant Podfile hooks already covered by the Xcode project.

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

suixinkan_ios/Features/Main/Views/MainScanPlusButton.swift

@@ -16,10 +16,20 @@ final class MainScanPlusButton: CYLPlusButton, CYLPlusButtonSubclassing {
 
     /// 构建中间扫码按钮实例，供 CYLTabBarController 注册使用。
     static func plusButton() -> Any {
-        let button = MainScanPlusButton(type: .custom)
-        button.frame = CGRect(x: 0, y: 0, width: 70, height: 64)
-        button.configureAppearance()
-        button.addTarget(button, action: #selector(handleScanTap), for: .touchUpInside)
+        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
     }
 
@@ -46,7 +56,7 @@ final class MainScanPlusButton: CYLPlusButton, CYLPlusButtonSubclassing {
 
         let symbolConfig = UIImage.SymbolConfiguration(pointSize: 30, weight: .bold)
         let iconView = UIImageView(
-            image: UIImage(systemName: "qrcode.viewfinder", withConfiguration: symbolConfig)
+            image: UIImage(named: "icon_scan")
         )
         iconView.tintColor = .white
         iconView.contentMode = .scaleAspectFit