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/PilotCertification/Views/PilotCertificationViews.swift

@@ -12,14 +12,14 @@ import UIKit
 
 /// 飞手认证页面，展示认证审核状态并支持提交/驳回后编辑。
 struct PilotCertificationView: View {
-    @Environment(AccountContext.self) private var accountContext
-    @Environment(ProfileAPI.self) private var profileAPI
-    @Environment(PilotCertificationAPI.self) private var pilotAPI
-    @Environment(OSSUploadService.self) private var ossUploadService
-    @Environment(ToastCenter.self) private var toastCenter
+    @EnvironmentObject private var accountContext: AccountContext
+    @Environment(\.profileAPI) private var profileAPI
+    @Environment(\.pilotCertificationAPI) private var pilotAPI
+    @Environment(\.ossUploadService) private var ossUploadService
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.globalLoading) private var globalLoading
 
-    @State private var viewModel = PilotCertificationViewModel()
+    @StateObject private var viewModel = PilotCertificationViewModel()
     @State private var selectedImageItem: PhotosPickerItem?
     private let countdownTimer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
 
@@ -55,7 +55,7 @@ struct PilotCertificationView: View {
         .onReceive(countdownTimer) { _ in
             viewModel.tickCountdown()
         }
-        .onChange(of: selectedImageItem) { _, item in
+        .onChange(of: selectedImageItem) { item in
             guard let item else { return }
             Task { await loadImage(item) }
         }