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/Profile/Views/RealNameAuthView.swift

@@ -11,12 +11,12 @@ import UIKit
 
 /// 实名认证页面，展示审核状态并允许提交基础实名资料。
 struct RealNameAuthView: View {
-    @Environment(AccountContext.self) private var accountContext
-    @Environment(ProfileAPI.self) private var profileAPI
-    @Environment(OSSUploadService.self) private var ossUploadService
-    @Environment(ToastCenter.self) private var toastCenter
+    @EnvironmentObject private var accountContext: AccountContext
+    @Environment(\.profileAPI) private var profileAPI
+    @Environment(\.ossUploadService) private var ossUploadService
+    @EnvironmentObject private var toastCenter: ToastCenter
     @Environment(\.globalLoading) private var globalLoading
-    @State private var viewModel = RealNameAuthViewModel()
+    @StateObject private var viewModel = RealNameAuthViewModel()
     @State private var pickedFrontItem: PhotosPickerItem?
     @State private var pickedBackItem: PhotosPickerItem?
 
@@ -38,10 +38,10 @@ struct RealNameAuthView: View {
         .task {
             await loadInfo()
         }
-        .onChange(of: pickedFrontItem) { _, item in
+        .onChange(of: pickedFrontItem) { item in
             Task { await prepareIdentityImage(from: item, side: .front) }
         }
-        .onChange(of: pickedBackItem) { _, item in
+        .onChange(of: pickedBackItem) { item in
             Task { await prepareIdentityImage(from: item, side: .back) }
         }
     }