基于 Lottie 在关键流程中新增全局 Loading 遮罩

引入带引用计数的 GlobalLoadingCenter，通过 RootView 及主要登录/订单/个人中心页面接入，并添加 Loading 动画资源与单元测试。

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

suixinkan/App/RootView.swift

@@ -15,6 +15,7 @@ struct RootView: View {
     @State private var scenicSpotContext = ScenicSpotContext()
     @State private var appRouter = AppRouter()
     @State private var toastCenter = ToastCenter()
+    @State private var globalLoading = GlobalLoadingCenter()
     @State private var snapshotStore: AccountSnapshotStore
     @State private var apiClient: APIClient
     @State private var authAPI: AuthAPI
@@ -66,12 +67,14 @@ struct RootView: View {
     var body: some View {
         rootContent
             .globalToastOverlay()
+            .globalLoadingOverlay(loadingCenter: globalLoading)
             .environment(appSession)
             .environment(accountContext)
             .environment(permissionContext)
             .environment(scenicSpotContext)
             .environment(appRouter)
             .environment(toastCenter)
+            .environment(\.globalLoading, globalLoading)
             .environment(snapshotStore)
             .environment(apiClient)
             .environment(authAPI)
@@ -87,14 +90,16 @@ struct RootView: View {
             .environment(authSessionCoordinator)
             .task {
                 apiClient.bindAuthTokenProvider { appSession.token }
-                await sessionBootstrapper.restore(
-                    appSession: appSession,
-                    accountContext: accountContext,
-                    permissionContext: permissionContext,
-                    profileAPI: profileAPI,
-                    accountContextAPI: accountContextAPI,
-                    toastCenter: toastCenter
-                )
+                await globalLoading.withLoading {
+                    await sessionBootstrapper.restore(
+                        appSession: appSession,
+                        accountContext: accountContext,
+                        permissionContext: permissionContext,
+                        profileAPI: profileAPI,
+                        accountContextAPI: accountContextAPI,
+                        toastCenter: toastCenter
+                    )
+                }
             }
             .task(id: scenicSpotTaskID) {
                 guard appSession.isLoggedIn else {
@@ -122,9 +127,8 @@ struct RootView: View {
         case .loggedOut:
             LoginView()
         case .restoring:
-            ProgressView()
+            Color(.systemBackground)
                 .frame(maxWidth: .infinity, maxHeight: .infinity)
-                .background(Color(.systemBackground))
         case .loggedIn:
             MainTabsView()
         }