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/Tasks/API/TaskAPI.swift

@@ -6,7 +6,7 @@
 //
 
 import Foundation
-import Observation
+import Combine
 
 /// 任务服务协议，抽象任务列表、详情、发布和云盘选择接口以便测试替换。
 @MainActor
@@ -44,9 +44,8 @@ protocol TaskServing {
 
 /// 任务 API，封装任务管理和发布任务相关接口。
 @MainActor
-@Observable
 final class TaskAPI: TaskServing {
-    @ObservationIgnored private let client: APIClient
+    private let client: APIClient
 
     /// 初始化任务 API，并注入共享网络客户端。
     init(client: APIClient) {

suixinkan/Features/Tasks/ViewModels/TaskCloudFileSelectionViewModel.swift

@@ -6,7 +6,7 @@
 //
 
 import Foundation
-import Observation
+import Combine
 
 /// 云盘文件类型筛选实体，表示发布任务选择附件时的过滤方式。
 enum TaskCloudFileFilter: Int, CaseIterable, Identifiable {
@@ -31,18 +31,17 @@ enum TaskCloudFileFilter: Int, CaseIterable, Identifiable {
 
 /// 云盘文件选择 ViewModel，负责目录浏览、筛选、分页和附件选择。
 @MainActor
-@Observable
-final class TaskCloudFileSelectionViewModel {
-    var path: [CloudDriveFile] = [CloudDriveFile(id: 0, name: "云盘")]
-    var files: [CloudDriveFile] = []
-    var total = 0
-    var page = 1
-    var searchText = ""
-    var selectedFilter: TaskCloudFileFilter = .all
-    var selectedFiles: [CloudDriveFile] = []
-    var isLoading = false
-    var isLoadingMore = false
-    var errorMessage: String?
+final class TaskCloudFileSelectionViewModel: ObservableObject {
+    @Published var path: [CloudDriveFile] = [CloudDriveFile(id: 0, name: "云盘")]
+    @Published var files: [CloudDriveFile] = []
+    @Published var total = 0
+    @Published var page = 1
+    @Published var searchText = ""
+    @Published var selectedFilter: TaskCloudFileFilter = .all
+    @Published var selectedFiles: [CloudDriveFile] = []
+    @Published var isLoading = false
+    @Published var isLoadingMore = false
+    @Published var errorMessage: String?
 
     private let pageSize = 20
 

suixinkan/Features/Tasks/ViewModels/TaskCreateViewModel.swift

@@ -6,7 +6,7 @@
 //
 
 import Foundation
-import Observation
+import Combine
 
 /// 任务云盘选择项实体，表示发布任务表单中的云盘附件。
 struct TaskCloudSelectionItem: Identifiable, Hashable {
@@ -43,19 +43,18 @@ struct TaskLocalUploadItem: Identifiable, Hashable {
 
 /// 发布任务 ViewModel，负责表单、附件上传和提交任务。
 @MainActor
-@Observable
-final class TaskCreateViewModel {
-    var taskName = ""
-    var remark = ""
-    var urgentHourText = "0"
-    var selectedOrder: AvailableOrderResponse?
-    var availableOrders: [AvailableOrderResponse] = []
-    var selectedCloudFiles: [TaskCloudSelectionItem] = []
-    var selectedLocalFiles: [TaskLocalUploadItem] = []
-    var isLoadingOrders = false
-    var isSubmitting = false
-    var errorMessage: String?
-    var didSubmitSuccessfully = false
+final class TaskCreateViewModel: ObservableObject {
+    @Published var taskName = ""
+    @Published var remark = ""
+    @Published var urgentHourText = "0"
+    @Published var selectedOrder: AvailableOrderResponse?
+    @Published var availableOrders: [AvailableOrderResponse] = []
+    @Published var selectedCloudFiles: [TaskCloudSelectionItem] = []
+    @Published var selectedLocalFiles: [TaskLocalUploadItem] = []
+    @Published var isLoadingOrders = false
+    @Published var isSubmitting = false
+    @Published var errorMessage: String?
+    @Published var didSubmitSuccessfully = false
 
     /// 判断当前表单是否满足提交按钮启用条件。
     var canSubmit: Bool {

suixinkan/Features/Tasks/ViewModels/TaskManagementViewModel.swift

@@ -6,7 +6,7 @@
 //
 
 import Foundation
-import Observation
+import Combine
 
 /// 任务状态筛选实体，表示任务管理页支持的任务状态。
 enum TaskStatusFilter: Int, CaseIterable, Identifiable {
@@ -37,18 +37,17 @@ enum TaskStatusFilter: Int, CaseIterable, Identifiable {
 
 /// 任务管理 ViewModel，负责任务列表、筛选、分页和错误状态。
 @MainActor
-@Observable
-final class TaskManagementViewModel {
-    var isLoading = false
-    var isLoadingMore = false
-    var tasks: [PhotographerTaskItem] = []
-    var total = 0
-    var page = 1
-    var selectedStatus: TaskStatusFilter = .all
-    var searchText = ""
-    var startDate: Date?
-    var endDate: Date?
-    var errorMessage: String?
+final class TaskManagementViewModel: ObservableObject {
+    @Published var isLoading = false
+    @Published var isLoadingMore = false
+    @Published var tasks: [PhotographerTaskItem] = []
+    @Published var total = 0
+    @Published var page = 1
+    @Published var selectedStatus: TaskStatusFilter = .all
+    @Published var searchText = ""
+    @Published var startDate: Date?
+    @Published var endDate: Date?
+    @Published var errorMessage: String?
 
     private let pageSize = 10
 
@@ -146,11 +145,10 @@ final class TaskManagementViewModel {
 
 /// 任务详情 ViewModel，负责详情加载和列表摘要兜底展示。
 @MainActor
-@Observable
-final class TaskDetailViewModel {
-    var isLoading = false
-    var detail: TaskDetailResponse?
-    var errorMessage: String?
+final class TaskDetailViewModel: ObservableObject {
+    @Published var isLoading = false
+    @Published var detail: TaskDetailResponse?
+    @Published var errorMessage: String?
 
     /// 加载任务详情；接口失败时保留外部传入的列表摘要。
     func load(api: any TaskServing, taskId: Int) async {

suixinkan/Features/Tasks/Views/TaskCreateView.swift

@@ -11,14 +11,14 @@ import UniformTypeIdentifiers
 
 /// 发布任务页面，负责填写任务信息、选择附件并提交任务。
 struct TaskCreateView: View {
-    @Environment(AccountContext.self) private var accountContext
-    @Environment(TaskAPI.self) private var taskAPI
-    @Environment(OSSUploadService.self) private var ossUploadService
-    @Environment(ToastCenter.self) private var toastCenter
+    @EnvironmentObject private var accountContext: AccountContext
+    @Environment(\.taskAPI) private var taskAPI
+    @Environment(\.ossUploadService) private var ossUploadService
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.dismiss) private var dismiss
     @Environment(\.globalLoading) private var globalLoading
 
-    @State private var viewModel = TaskCreateViewModel()
+    @StateObject private var viewModel = TaskCreateViewModel()
     @State private var showOrderSelection = false
     @State private var showCloudSelection = false
     @State private var pickerItems: [PhotosPickerItem] = []
@@ -60,7 +60,7 @@ struct TaskCreateView: View {
                 }
             }
         }
-        .onChange(of: pickerItems) { _, items in
+        .onChange(of: pickerItems) { items in
             Task { await importPickerItems(items) }
         }
     }

suixinkan/Features/Tasks/Views/TaskDetailView.swift

@@ -9,14 +9,14 @@ import SwiftUI
 
 /// 任务详情页面，展示任务基础信息、关联订单和任务结果。
 struct TaskDetailView: View {
-    @Environment(TaskAPI.self) private var taskAPI
-    @Environment(ToastCenter.self) private var toastCenter
+    @Environment(\.taskAPI) private var taskAPI
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.globalLoading) private var globalLoading
 
     let taskId: Int
     let summary: PhotographerTaskItem?
 
-    @State private var viewModel = TaskDetailViewModel()
+    @StateObject private var viewModel = TaskDetailViewModel()
 
     var body: some View {
         ScrollView {

suixinkan/Features/Tasks/Views/TaskManagementView.swift

@@ -9,13 +9,13 @@ import SwiftUI
 
 /// 任务管理页面，展示任务列表、筛选条件和发布任务入口。
 struct TaskManagementView: View {
-    @Environment(AccountContext.self) private var accountContext
-    @Environment(RouterPath.self) private var router
-    @Environment(TaskAPI.self) private var taskAPI
-    @Environment(ToastCenter.self) private var toastCenter
+    @EnvironmentObject private var accountContext: AccountContext
+    @EnvironmentObject private var router: RouterPath
+    @Environment(\.taskAPI) private var taskAPI
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.globalLoading) private var globalLoading
 
-    @State private var viewModel = TaskManagementViewModel()
+    @StateObject private var viewModel = TaskManagementViewModel()
 
     var body: some View {
         ScrollView {
@@ -55,7 +55,7 @@ struct TaskManagementView: View {
                 }
             }
             .pickerStyle(.segmented)
-            .onChange(of: viewModel.selectedStatus) { _, _ in
+            .onChange(of: viewModel.selectedStatus) { _ in
                 Task { await reload(showLoading: true) }
             }
 

suixinkan/Features/Tasks/Views/TaskSelectionViews.swift

@@ -57,13 +57,13 @@ struct TaskOrderSelectionView: View {
 
 /// 任务云盘文件选择页面，供发布任务时选择云盘附件。
 struct TaskCloudFileSelectionView: View {
-    @Environment(TaskAPI.self) private var taskAPI
-    @Environment(ToastCenter.self) private var toastCenter
+    @Environment(\.taskAPI) private var taskAPI
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.dismiss) private var dismiss
 
     let onConfirm: ([TaskCloudSelectionItem]) -> Void
 
-    @State private var viewModel = TaskCloudFileSelectionViewModel()
+    @StateObject private var viewModel = TaskCloudFileSelectionViewModel()
 
     var body: some View {
         VStack(spacing: 0) {
@@ -108,7 +108,7 @@ struct TaskCloudFileSelectionView: View {
                 }
             }
             .pickerStyle(.segmented)
-            .onChange(of: viewModel.selectedFilter) { _, _ in
+            .onChange(of: viewModel.selectedFilter) { _ in
                 Task { await reload() }
             }
         }