修复合作获客扫码绑定崩溃与 Toast 层级，并接入分成比例修改。

将扫码页提升到列表层弹出并补齐 AppDelegate.window，避免扫码时 UIKit 取主窗口崩溃；Toast 改用独立 UIWindow 显示在 sheet 之上；合作获客员支持短信验证修改分成比例，同时优化冷启动根视图创建时机并补充相关测试。

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

suixinkan/App/State/ToastCenter.swift

@@ -7,6 +7,7 @@
 
 import Combine
 import SwiftUI
+import UIKit
 
 @MainActor
 /// 全局 Toast 状态中心，负责保存和清除当前提示文案。
@@ -62,26 +63,75 @@ final class ToastCenter: ObservableObject {
     #endif
 }
 
-/// 全局 Toast 叠加层修饰器，负责把 Toast 展示到屏幕中央。
-private struct GlobalToastOverlay: ViewModifier {
-    @EnvironmentObject private var toastCenter: ToastCenter
+/// Toast 独立窗口宿主，确保提示浮在 sheet / fullScreenCover 等 present 层之上。
+@MainActor
+private final class ToastWindowPresenter {
+    static let shared = ToastWindowPresenter()
 
-    func body(content: Content) -> some View {
-        content
-            .overlay {
-                Group {
-                    if let message = toastCenter.message {
-                        toastBanner(message)
-                            .transition(.opacity)
-                    }
-                }
-                .allowsHitTesting(false)
-            }
-            .animation(.easeInOut(duration: 0.18), value: toastCenter.message)
+    private var toastWindow: UIWindow?
+
+    /// 在独立 UIWindow 中展示 Toast。
+    func show(message: String) {
+        guard let windowScene = resolveWindowScene() else { return }
+
+        let window: UIWindow
+        if let existing = toastWindow, existing.windowScene === windowScene {
+            window = existing
+        } else {
+            let newWindow = PassthroughWindow(windowScene: windowScene)
+            newWindow.windowLevel = .alert + 1
+            newWindow.backgroundColor = .clear
+            toastWindow = newWindow
+            window = newWindow
+        }
+
+        let hosting = UIHostingController(
+            rootView: ToastBannerHostView(message: message)
+        )
+        hosting.view.backgroundColor = .clear
+        window.rootViewController = hosting
+        window.isHidden = false
     }
 
-    /// 构建屏幕中央的黑色半透明圆角 Toast 卡片。
-    private func toastBanner(_ message: String) -> some View {
+    /// 隐藏 Toast 窗口。
+    func hide() {
+        toastWindow?.isHidden = true
+        toastWindow?.rootViewController = nil
+    }
+
+    /// 取当前前台 window scene，供独立 Toast 窗口挂载。
+    private func resolveWindowScene() -> UIWindowScene? {
+        let scenes = UIApplication.shared.connectedScenes.compactMap { $0 as? UIWindowScene }
+        return scenes.first { $0.activationState == .foregroundActive } ?? scenes.first
+    }
+}
+
+/// 透传触摸事件的 Toast 窗口，避免挡住下层弹窗交互。
+private final class PassthroughWindow: UIWindow {
+    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
+        guard let view = super.hitTest(point, with: event) else { return nil }
+        return view === rootViewController?.view ? nil : view
+    }
+}
+
+/// Toast 全屏居中容器。
+private struct ToastBannerHostView: View {
+    let message: String
+
+    var body: some View {
+        ZStack {
+            ToastBannerContent(message: message)
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+        .allowsHitTesting(false)
+    }
+}
+
+/// 屏幕中央的黑色半透明圆角 Toast 卡片。
+private struct ToastBannerContent: View {
+    let message: String
+
+    var body: some View {
         HStack(spacing: 10) {
             Image(systemName: "exclamationmark.triangle.fill")
                 .font(.system(size: 16, weight: .semibold))
@@ -97,6 +147,31 @@ private struct GlobalToastOverlay: ViewModifier {
         .padding(.vertical, 14)
         .background(Color.black.opacity(0.78), in: RoundedRectangle(cornerRadius: 12))
         .padding(.horizontal, 40)
+        .accessibilityIdentifier("global.toast")
+    }
+}
+
+/// 全局 Toast 展示桥接层，监听 ToastCenter 并驱动独立窗口。
+private struct GlobalToastOverlay: ViewModifier {
+    @EnvironmentObject private var toastCenter: ToastCenter
+
+    func body(content: Content) -> some View {
+        content
+            .onAppear {
+                syncToastWindow(with: toastCenter.message)
+            }
+            .onChange(of: toastCenter.message) { message in
+                syncToastWindow(with: message)
+            }
+    }
+
+    /// 根据当前文案显示或隐藏 Toast 窗口。
+    private func syncToastWindow(with message: String?) {
+        if let message {
+            ToastWindowPresenter.shared.show(message: message)
+        } else {
+            ToastWindowPresenter.shared.hide()
+        }
     }
 }