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/LocationReport/API/LocationReportAPI.swift

@@ -6,7 +6,7 @@
 //
 
 import Foundation
-import Observation
+import Combine
 
 /// 位置上报服务协议，抽象上报和历史接口以便 ViewModel 测试替换。
 @MainActor
@@ -20,9 +20,8 @@ protocol LocationReportServing {
 
 /// 位置上报 API，负责封装旧工程定位上报相关接口。
 @MainActor
-@Observable
 final class LocationReportAPI: LocationReportServing {
-    @ObservationIgnored private let client: APIClient
+    private let client: APIClient
 
     /// 初始化位置上报 API，并注入共享网络客户端。
     init(client: APIClient) {

suixinkan/Features/LocationReport/ViewModels/LocationReportViewModels.swift

@@ -6,22 +6,21 @@
 //
 
 import Foundation
-import Observation
+import Combine
 
 /// 位置上报 ViewModel，负责页面内在线状态、坐标、倒计时和提交动作。
 @MainActor
-@Observable
-final class LocationReportViewModel {
-    var isOnline = false
-    var reminderMinutes = 30
-    var secondsUntilReport = 0
-    var currentCoordinate: LocationCoordinate?
-    var markedCoordinate: LocationCoordinate?
-    var currentAddress = ""
-    var markedAddress = ""
-    var lastReportText = ""
-    var errorMessage: String?
-    var isSubmitting = false
+final class LocationReportViewModel: ObservableObject {
+    @Published var isOnline = false
+    @Published var reminderMinutes = 30
+    @Published var secondsUntilReport = 0
+    @Published var currentCoordinate: LocationCoordinate?
+    @Published var markedCoordinate: LocationCoordinate?
+    @Published var currentAddress = ""
+    @Published var markedAddress = ""
+    @Published var lastReportText = ""
+    @Published var errorMessage: String?
+    @Published var isSubmitting = false
 
     /// 倒计时展示文案。
     var countdownText: String {
@@ -130,18 +129,17 @@ final class LocationReportViewModel {
 
 /// 位置上报历史 ViewModel，负责筛选、日期和分页加载。
 @MainActor
-@Observable
-final class LocationReportHistoryViewModel {
-    var selectedType: LocationReportType = .all
-    var startDate: Date?
-    var endDate: Date?
-    var items: [LocationReportHistoryItem] = []
-    var errorMessage: String?
-    var isLoading = false
-    var isLoadingMore = false
-    var total = 0
+final class LocationReportHistoryViewModel: ObservableObject {
+    @Published var selectedType: LocationReportType = .all
+    @Published var startDate: Date?
+    @Published var endDate: Date?
+    @Published var items: [LocationReportHistoryItem] = []
+    @Published var errorMessage: String?
+    @Published var isLoading = false
+    @Published var isLoadingMore = false
+    @Published var total = 0
 
-    private var page = 1
+    @Published private var page = 1
     private let pageSize = 20
 
     /// 是否还有下一页历史记录。

suixinkan/Features/LocationReport/Views/LocationReportViews.swift

@@ -10,14 +10,14 @@ import SwiftUI
 
 /// 位置上报页面，支持当前位置上报、标记点上报、在线状态和提醒设置。
 struct LocationReportView: View {
-    @Environment(AccountContext.self) private var accountContext
-    @Environment(AccountSnapshotStore.self) private var snapshotStore
-    @Environment(LocationReportAPI.self) private var locationReportAPI
-    @Environment(RouterPath.self) private var router
-    @Environment(ToastCenter.self) private var toastCenter
+    @EnvironmentObject private var accountContext: AccountContext
+    @Environment(\.accountSnapshotStore) private var snapshotStore
+    @Environment(\.locationReportAPI) private var locationReportAPI
+    @EnvironmentObject private var router: RouterPath
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.globalLoading) private var globalLoading
 
-    @State private var viewModel = LocationReportViewModel()
+    @StateObject private var viewModel = LocationReportViewModel()
     @State private var locationProvider = ForegroundLocationProvider()
     private let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
 
@@ -242,12 +242,12 @@ struct LocationReportView: View {
 
 /// 位置上报历史页面，展示历史记录筛选和分页。
 struct LocationReportHistoryView: View {
-    @Environment(AccountSnapshotStore.self) private var snapshotStore
-    @Environment(LocationReportAPI.self) private var locationReportAPI
-    @Environment(ToastCenter.self) private var toastCenter
+    @Environment(\.accountSnapshotStore) private var snapshotStore
+    @Environment(\.locationReportAPI) private var locationReportAPI
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.globalLoading) private var globalLoading
 
-    @State private var viewModel = LocationReportHistoryViewModel()
+    @StateObject private var viewModel = LocationReportHistoryViewModel()
 
     var body: some View {
         ScrollView {
@@ -277,7 +277,7 @@ struct LocationReportHistoryView: View {
                 }
             }
             .pickerStyle(.segmented)
-            .onChange(of: viewModel.selectedType) { _, _ in
+            .onChange(of: viewModel.selectedType) { _ in
                 Task { await reload(showLoading: true) }
             }