增加 新版本登录请求

Work/Store.Api/ImageCacheApi.cs

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+using CsharpHttpHelper;
+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Work.Services;
+
+namespace Work.Store.Api;
+
+/// <summary>图片缓存接口，返回批量保存失败的 MD5 列表。</summary>
+public sealed class ImageCacheApi
+{
+    private readonly ApiTransport _transport;
+
+    public ImageCacheApi(ApiTransport transport)
+        => _transport = transport ?? throw new ArgumentNullException(nameof(transport));
+
+    public List<ImageCache> GetImageCaches(List<string> md5s)
+        => _transport.GetRequired<List<ImageCache>>("ImageCache/GetImageCache", MethodType.Post, new { md5s });
+
+    public List<string> SaveImageCaches(int platform, IReadOnlyList<ImageCache> images)
+    {
+        if (images == null) throw new ArgumentNullException(nameof(images));
+        if (images.Count == 0) return new List<string>();
+        try
+        {
+            _transport.Send<object>("ImageCache/AddOrUpdate", MethodType.Post,
+                images.Select(image => new { md5 = image.Md5, Platform = platform, PlatformUrl = image.PlatformUrl }).ToArray());
+            return new List<string>();
+        }
+        catch (ApiException ex) when (ex.Code == 500)
+        {
+            // 兼容旧服务的部分失败响应；没有明确失败项时保持整体失败。
+            if (ex.ResponseData is JArray array && array.Count > 0 && array.All(item => item.Type == JTokenType.String))
+                return array.ToObject<List<string>>();
+            if (ex.ResponseData?.Type == JTokenType.String && !string.IsNullOrWhiteSpace((string)ex.ResponseData))
+                return new List<string> { (string)ex.ResponseData };
+            throw;
+        }
+    }
+}