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/Invite/API/InviteAPI.swift

@@ -6,7 +6,7 @@
 //
 
 import Foundation
-import Observation
+import Combine
 
 /// 邀请服务协议，抽象邀请信息和邀请记录接口。
 @MainActor
@@ -20,9 +20,8 @@ protocol InviteServing {
 
 /// 邀请 API，封装摄影师邀请相关接口。
 @MainActor
-@Observable
 final class InviteAPI: InviteServing {
-    @ObservationIgnored private let client: APIClient
+    private let client: APIClient
 
     /// 初始化邀请 API，并注入共享网络客户端。
     init(client: APIClient) {

suixinkan/Features/Invite/ViewModels/InviteViewModels.swift

@@ -7,22 +7,21 @@
 
 import CoreImage.CIFilterBuiltins
 import Foundation
-import Observation
+import Combine
 import UIKit
 
 /// 邀请页 ViewModel，负责加载邀请信息、生成二维码和复制内容。
 @MainActor
-@Observable
-final class PhotographerInviteViewModel {
-    private(set) var loading = false
-    private(set) var inviteCode = ""
-    private(set) var inviteUrl = ""
-    private(set) var rules: [String] = []
-    private(set) var qrImage: UIImage?
-    var errorMessage: String?
+final class PhotographerInviteViewModel: ObservableObject {
+    @Published private(set) var loading = false
+    @Published private(set) var inviteCode = ""
+    @Published private(set) var inviteUrl = ""
+    @Published private(set) var rules: [String] = []
+    @Published private(set) var qrImage: UIImage?
+    @Published var errorMessage: String?
 
-    @ObservationIgnored private let qrContext = CIContext()
-    @ObservationIgnored private let qrFilter = CIFilter.qrCodeGenerator()
+    private let qrContext = CIContext()
+    private let qrFilter = CIFilter.qrCodeGenerator()
 
     /// 重新加载邀请信息。
     func reload(api: any InviteServing) async {
@@ -72,21 +71,20 @@ final class PhotographerInviteViewModel {
 
 /// 邀请记录 ViewModel，负责邀请用户、奖励明细和钱包汇总分页。
 @MainActor
-@Observable
-final class InviteRecordViewModel {
-    var tab: InviteRecordTab = .invite
-    private(set) var totalRewardText = "¥ 0.00"
-    private(set) var withdrawableText = "¥ 0.00"
-    private(set) var displayRows: [InviteDisplayRow] = []
-    private(set) var loading = false
-    private(set) var loadingMore = false
-    private(set) var hasMore = false
-    var errorMessage: String?
+final class InviteRecordViewModel: ObservableObject {
+    @Published var tab: InviteRecordTab = .invite
+    @Published private(set) var totalRewardText = "¥ 0.00"
+    @Published private(set) var withdrawableText = "¥ 0.00"
+    @Published private(set) var displayRows: [InviteDisplayRow] = []
+    @Published private(set) var loading = false
+    @Published private(set) var loadingMore = false
+    @Published private(set) var hasMore = false
+    @Published var errorMessage: String?
 
-    private var inviteRows: [InviteDisplayRow] = []
-    private var rewardRows: [InviteDisplayRow] = []
-    private var invitePage = 1
-    private var rewardPage = 1
+    @Published private var inviteRows: [InviteDisplayRow] = []
+    @Published private var rewardRows: [InviteDisplayRow] = []
+    @Published private var invitePage = 1
+    @Published private var rewardPage = 1
     private let invitePageSize = 20
     private let rewardPageSize = 10
 

suixinkan/Features/Invite/Views/InviteViews.swift

@@ -9,10 +9,10 @@ import SwiftUI
 
 /// 摄影师邀请页面，展示邀请二维码、邀请码、规则和邀请记录入口。
 struct PhotographerInviteView: View {
-    @Environment(InviteAPI.self) private var inviteAPI
-    @Environment(ToastCenter.self) private var toastCenter
+    @Environment(\.inviteAPI) private var inviteAPI
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.globalLoading) private var globalLoading
-    @State private var viewModel = PhotographerInviteViewModel()
+    @StateObject private var viewModel = PhotographerInviteViewModel()
 
     var body: some View {
         ScrollView {
@@ -140,10 +140,10 @@ struct PhotographerInviteView: View {
 
 /// 邀请记录页面，展示邀请用户和奖励记录。
 struct InviteRecordView: View {
-    @Environment(InviteAPI.self) private var inviteAPI
-    @Environment(WalletAPI.self) private var walletAPI
+    @Environment(\.inviteAPI) private var inviteAPI
+    @Environment(\.walletAPI) private var walletAPI
     @Environment(\.globalLoading) private var globalLoading
-    @State private var viewModel = InviteRecordViewModel()
+    @StateObject private var viewModel = InviteRecordViewModel()
 
     var body: some View {
         VStack(spacing: 0) {
@@ -155,7 +155,7 @@ struct InviteRecordView: View {
             }
             .pickerStyle(.segmented)
             .padding(AppMetrics.Spacing.medium)
-            .onChange(of: viewModel.tab) { _, newValue in
+            .onChange(of: viewModel.tab) { newValue in
                 Task { await viewModel.selectTab(newValue, inviteAPI: inviteAPI, walletAPI: walletAPI) }
             }
             recordList
@@ -205,7 +205,7 @@ struct InviteRecordView: View {
         ScrollView {
             LazyVStack(spacing: 0) {
                 if viewModel.displayRows.isEmpty && !viewModel.loading {
-                    ContentUnavailableView("暂无记录", systemImage: "tray")
+                    AppContentUnavailableView("暂无记录", systemImage: "tray")
                         .frame(minHeight: 280)
                 }
                 ForEach(viewModel.displayRows) { row in