Add Lottie-based global loading overlay across key flows.

Introduce GlobalLoadingCenter with reference counting, wire it through RootView and major auth/order/profile screens, and add the loading animation asset plus unit tests.

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

suixinkan/Features/Orders/Views/OrderDetailViews.swift

@@ -13,6 +13,7 @@ struct StoreOrderDetailView: View {
     @Environment(OrdersAPI.self) private var ordersAPI
     @Environment(RouterPath.self) private var router
     @Environment(ToastCenter.self) private var toastCenter
+    @Environment(\.globalLoading) private var globalLoading
 
     let item: OrderEntity
     @State private var viewModel: OrderDetailViewModel
@@ -25,16 +26,6 @@ struct StoreOrderDetailView: View {
 
     var body: some View {
         List {
-            if viewModel.loading {
-                Section {
-                    HStack {
-                        Spacer()
-                        ProgressView("加载详情中...")
-                        Spacer()
-                    }
-                }
-            }
-
             if let contextMessage = viewModel.contextMessage {
                 Section {
                     Label(contextMessage, systemImage: "info.circle")
@@ -117,7 +108,9 @@ struct StoreOrderDetailView: View {
         .navigationTitle("订单详情")
         .navigationBarTitleDisplayMode(.inline)
         .task {
-            await viewModel.load(api: ordersAPI, fallbackStoreId: accountContext.currentStore?.id)
+            await globalLoading.withLoading(message: "加载详情中...") {
+                await viewModel.load(api: ordersAPI, fallbackStoreId: accountContext.currentStore?.id)
+            }
         }
         .alert("提示", isPresented: errorBinding) {
             Button("知道了", role: .cancel) {}