Initial commit: suixinkan_ios UIKit rewrite project.

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

suixinkan_ios/Features/Orders/ViewModels/OrderDetailViewModel.swift

@@ -0,0 +1,75 @@
+//
+//  OrderDetailViewModel.swift
+//  suixinkan
+//
+//  Created by Codex on 2026/6/22.
+//
+
+import Foundation
+
+@MainActor
+/// 订单详情 ViewModel，负责加载门店订单详情并保留列表摘要兜底展示。
+final class OrderDetailViewModel {
+    var onChange: (() -> Void)?
+    private(set) var detail: StoreOrderDetailResponse? { didSet { onChange?() } }
+    private(set) var loading = false { didSet { onChange?() } }
+    private(set) var errorMessage: String? { didSet { onChange?() } }
+    private(set) var contextMessage: String? { didSet { onChange?() } }
+
+    /// 当前页面用于展示的订单信息，详情接口成功时优先使用详情数据。
+    var display: StoreOrderDetailDisplay {
+        if let detail {
+            return StoreOrderDetailDisplay(detail: detail)
+        }
+        return StoreOrderDetailDisplay(item: item)
+    }
+
+    /// 详情中的项目配置。
+    var projectInfo: StoreOrderProjectInfo? {
+        detail?.multiTravel?.projectInfo
+    }
+
+    /// 详情中的拍摄点列表。
+    var shootingList: [StoreOrderShootingListItem] {
+        detail?.multiTravel?.shootingList ?? []
+    }
+
+    private let item: OrderEntity
+
+    /// 初始化详情 ViewModel，并注入列表订单作为兜底数据。
+    init(item: OrderEntity) {
+        self.item = item
+    }
+
+    /// 加载门店订单详情，缺少门店 ID 时只保留列表摘要展示。
+    func load(api: OrderServing, fallbackStoreId: Int?, forceReload: Bool = false) async {
+        guard !loading else { return }
+        if forceReload {
+            detail = nil
+        } else {
+            guard detail == nil else { return }
+        }
+
+        guard let storeId = item.storeId ?? fallbackStoreId, storeId > 0 else {
+            contextMessage = "缺少门店上下文，当前展示订单摘要。"
+            return
+        }
+
+        loading = true
+        errorMessage = nil
+        contextMessage = nil
+        defer { loading = false }
+
+        do {
+            detail = try await api.storeOrderDetail(storeId: storeId, orderNumber: item.orderNumber)
+        } catch {
+            errorMessage = error.localizedDescription
+            contextMessage = "详情加载失败，当前展示订单摘要。"
+        }
+    }
+
+    /// 清理当前错误提示。
+    func clearError() {
+        errorMessage = nil
+    }
+}