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/Home/Views/HomeView.swift

@@ -10,13 +10,13 @@ import SwiftUI
 
 /// 首页主视图，展示景区、工作状态、快捷操作和权限菜单入口。
 struct HomeView: View {
-    @Environment(AccountContext.self) private var accountContext
-    @Environment(PermissionContext.self) private var permissionContext
-    @Environment(AppRouter.self) private var appRouter
-    @Environment(RouterPath.self) private var router
+    @EnvironmentObject private var accountContext: AccountContext
+    @EnvironmentObject private var permissionContext: PermissionContext
+    @EnvironmentObject private var appRouter: AppRouter
+    @EnvironmentObject private var router: RouterPath
     @Environment(\.horizontalSizeClass) private var horizontalSizeClass
 
-    @State private var viewModel = HomeViewModel()
+    @StateObject private var viewModel = HomeViewModel()
     @State private var commonUris: [String] = []
     @State private var isOnline = false
     @State private var reminderMinutes = 0
@@ -113,10 +113,10 @@ struct HomeView: View {
             guard isOnline, secondsUntilReport > 0 else { return }
             secondsUntilReport -= 1
         }
-        .onChange(of: permissionContext.currentRole?.id) { _, _ in
+        .onChange(of: permissionContext.currentRole?.id) { _ in
             rebuildMenusFromCurrentContext()
         }
-        .onChange(of: permissionContext.rolePermissions.count) { _, _ in
+        .onChange(of: permissionContext.rolePermissions.count) { _ in
             rebuildMenusFromCurrentContext()
         }
         .alert("切换在线状态", isPresented: $showOnlineDialog) {
@@ -423,9 +423,9 @@ struct HomeView: View {
 #Preview {
     NavigationStack {
         HomeView()
-            .environment(AccountContext())
-            .environment(PermissionContext())
-            .environment(AppRouter())
-            .environment(RouterPath())
+            .environmentObject(AccountContext())
+            .environmentObject(PermissionContext())
+            .environmentObject(AppRouter())
+            .environmentObject(RouterPath())
     }
 }