从 iOS 17 Observation 迁移至 iOS 16 兼容的 Combine 架构

将最低部署版本降至 iOS 16，以 ObservableObject 替换 @Observable，新增导航与 UI 兼容层，并补充登录冒烟 UI 测试。

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

suixinkan/Features/Orders/Views/OrderTailUploadViews.swift

@@ -11,21 +11,21 @@ import UniformTypeIdentifiers
 
 /// 多点旅拍任务上传页面，负责选择打卡点和素材后提交到订单接口。
 struct MultiTravelTaskUploadView: View {
-    @Environment(AccountContext.self) private var accountContext
-    @Environment(OrdersAPI.self) private var ordersAPI
-    @Environment(OSSUploadService.self) private var uploadService
-    @Environment(ToastCenter.self) private var toastCenter
+    @EnvironmentObject private var accountContext: AccountContext
+    @Environment(\.ordersAPI) private var ordersAPI
+    @Environment(\.ossUploadService) private var uploadService
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.dismiss) private var dismiss
     @Environment(\.globalLoading) private var globalLoading
 
-    @State private var viewModel: MultiTravelTaskUploadViewModel
+    @StateObject private var viewModel: MultiTravelTaskUploadViewModel
     @State private var showSpotPicker = false
     @State private var showCloudSelection = false
     @State private var pickerItems: [PhotosPickerItem] = []
 
     /// 使用订单号初始化任务上传页面。
     init(initialOrderNumber: String) {
-        _viewModel = State(initialValue: MultiTravelTaskUploadViewModel(initialOrderNumber: initialOrderNumber))
+        _viewModel = StateObject(wrappedValue: MultiTravelTaskUploadViewModel(initialOrderNumber: initialOrderNumber))
     }
 
     var body: some View {
@@ -61,7 +61,7 @@ struct MultiTravelTaskUploadView: View {
             }
             Button("取消", role: .cancel) {}
         }
-        .onChange(of: pickerItems) { _, items in
+        .onChange(of: pickerItems) { items in
             Task { await importPickerItems(items) }
         }
         .alert("提示", isPresented: errorBinding) {