Platform upgrade: login auth fix, OCR/OSS upload, system menus and dicts, weather dashboard, weighing and invoice modules

backend/AgriculturalPlatform.Api/Models/SysRole.cs

@@ -0,0 +1,27 @@
+namespace AgriculturalPlatform.Api.Models;
+
+/// <summary>角色</summary>
+public class SysRole
+{
+    public int Id { get; set; }
+
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>角色编码（如 super_admin / company_admin / station_staff / viewer）</summary>
+    public string Code { get; set; } = string.Empty;
+
+    public string Description { get; set; } = string.Empty;
+
+    /// <summary>系统内置角色不可删除</summary>
+    public bool IsSystem { get; set; }
+
+    public DateTime CreatedAt { get; set; } = DateTime.Now;
+}
+
+/// <summary>角色-菜单关联</summary>
+public class SysRoleMenu
+{
+    public int RoleId { get; set; }
+
+    public int MenuId { get; set; }
+}