fix: 重新添加缺失的Upload模型类

- 添加 UploadResult.cs - 文件上传结果模型
- 添加 UploadResponse.cs - 上传响应模型
- 添加 GetPresignedUrlRequest.cs - 预签名URL请求模型
- 添加 PresignedUrlResponse.cs - 预签名URL响应模型

修复编译错误：解决因Upload模型类缺失导致的编译失败问题

server/HoneyBox/src/HoneyBox.Admin.Business/Models/Upload/GetPresignedUrlRequest.cs

@@ -0,0 +1,9 @@
+namespace HoneyBox.Admin.Business.Models.Upload;
+
+public class GetPresignedUrlRequest
+{
+    public string FileName { get; set; } = string.Empty;
+    public string ContentType { get; set; } = string.Empty;
+    public int ExpiresInSeconds { get; set; } = 600;
+    public long FileSize { get; set; }
+}

server/HoneyBox/src/HoneyBox.Admin.Business/Models/Upload/PresignedUrlResponse.cs

@@ -0,0 +1,14 @@
+namespace HoneyBox.Admin.Business.Models.Upload;
+
+public class PresignedUrlResponse
+{
+    public bool Success { get; set; }
+    public string? UploadUrl { get; set; }
+    public string? AccessUrl { get; set; }
+    public string? ErrorMessage { get; set; }
+    public DateTime ExpiresAt { get; set; }
+    public string? FileUrl { get; set; }
+    public string? ObjectKey { get; set; }
+    public int ExpiresIn { get; set; }
+    public string? StorageType { get; set; }
+}

server/HoneyBox/src/HoneyBox.Admin.Business/Models/Upload/UploadResponse.cs

@@ -0,0 +1,10 @@
+namespace HoneyBox.Admin.Business.Models.Upload;
+
+public class UploadResponse
+{
+    public bool Success { get; set; }
+    public string? Url { get; set; }
+    public string? FileName { get; set; }
+    public long FileSize { get; set; }
+    public string? ErrorMessage { get; set; }
+}

server/HoneyBox/src/HoneyBox.Admin.Business/Models/Upload/UploadResult.cs

@@ -0,0 +1,18 @@
+namespace HoneyBox.Admin.Business.Models.Upload;
+
+public class UploadResult
+{
+    public bool Success { get; set; }
+    public string? Url { get; set; }
+    public string? ErrorMessage { get; set; }
+
+    public static UploadResult Ok(string url)
+    {
+        return new UploadResult { Success = true, Url = url };
+    }
+
+    public static UploadResult Fail(string errorMessage)
+    {
+        return new UploadResult { Success = false, ErrorMessage = errorMessage };
+    }
+}