Migrate from iOS 17 Observation to iOS 16-compatible Combine architecture.

Lower deployment target to iOS 16, replace @Observable with ObservableObject, add navigation and UI compatibility shims, and include login smoke UI tests.

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

suixinkan/Features/ScenicPermission/Views/PermissionApplyStatusView.swift

@@ -9,8 +9,8 @@ import SwiftUI
 
 /// 权限申请状态页面，展示审核中、通过或驳回的角色景区权限申请。
 struct PermissionApplyStatusView: View {
-    @Environment(ScenicPermissionAPI.self) private var scenicPermissionAPI
-    @State private var viewModel = PermissionApplyStatusViewModel()
+    @Environment(\.scenicPermissionAPI) private var scenicPermissionAPI
+    @StateObject private var viewModel = PermissionApplyStatusViewModel()
     @State private var editingPending: RoleApplyPendingResponse?
     let applyCode: String?
 
@@ -27,7 +27,7 @@ struct PermissionApplyStatusView: View {
                     roleCard(pending)
                     scenicCard(pending)
                 } else if viewModel.loadFailed {
-                    ContentUnavailableView(
+                    AppContentUnavailableView(
                         "申请状态加载失败",
                         systemImage: "exclamationmark.triangle",
                         description: Text(viewModel.loadFailureReason ?? "请检查网络后重试")
@@ -38,7 +38,7 @@ struct PermissionApplyStatusView: View {
                     .font(.system(size: AppMetrics.FontSize.footnote, weight: .semibold))
                     .buttonStyle(.plain)
                 } else {
-                    ContentUnavailableView("暂无审核中的申请", systemImage: "doc.text.magnifyingglass")
+                    AppContentUnavailableView("暂无审核中的申请", systemImage: "doc.text.magnifyingglass")
                 }
             }
             .padding(AppMetrics.Spacing.medium)
@@ -57,7 +57,7 @@ struct PermissionApplyStatusView: View {
                 }
             }
         }
-        .navigationDestination(item: $editingPending) { pending in
+        .appNavigationDestination(item: $editingPending) { pending in
             PermissionApplyView(initialPending: pending)
         }
         .task {