新增 Account、Department 和 Role 類別

Models/Entities/Account.cs

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+using System;
+
+namespace Models.Entities
+{
+    public class Account : BaseEntity
+    {
+        public int AccountId { get; set; }
+
+        public string Name { get; set; } = string.Empty;
+        public string Username { get; set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public string Email { get; set; } = string.Empty;
+
+        public int DepartmentId { get; set; }
+        public int RoleId { get; set; }
+        public AccountStatus Status { get; set; }
+
+        public virtual Department? Department { get; set; }
+        public virtual Role? Role { get; set; }
+    }
+
+    public enum AccountStatus
+    {
+        Enabled,
+        Disabled,
+        Unverified
+    }
+}

Models/Entities/Department.cs

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+using System.Collections.Generic;
+
+namespace Models.Entities
+{
+    public class Department
+    {
+        public int DepartmentId { get; set; }
+        public string DepartmentName { get; set; } = string.Empty;
+
+        public virtual ICollection<Account> Accounts { get; set; } = new HashSet<Account>();
+    }
+}

Models/Entities/Role.cs

@@ -0,0 +1,12 @@
+using System.Collections.Generic;
+
+namespace Models.Entities
+{
+    public class Role
+    {
+        public int RoleId { get; set; }
+        public string RoleName { get; set; } = string.Empty;
+
+        public virtual ICollection<Account> Accounts { get; set; } = new HashSet<Account>();
+    }
+}