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+using F9WebAiTest.Application.Common.Exceptions;
+using F9WebAiTest.Application.Interfaces.SnowflakeID;
+using F9WebAiTest.Domain.Entities.SYS.RBAC;
+using F9WebAiTest.Domain.Interfaces.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Commands;
+
+/// <summary>命令定义</summary>
+public record UserRole_AssignCommand(long UserId, long RoleId) : IRequest<long>;
+
+/// <summary>命令处理器</summary>
+public class UserRole_AssignCommandHandler(
+    IUserRoleWriteRepository userRoleWriteRepository,
+    IUserWriteRepository userWriteRepository,
+    ISnowflakeIdGenerator snowflakeIdGenerator,
+    IPublisher eventBus) : IRequestHandler<UserRole_AssignCommand, long>
+{
+    public async Task<long> Handle(UserRole_AssignCommand command, CancellationToken cancellationToken)
+    {
+        if (command.UserId <= 0) throw new F9OperationException("用户ID不能为空");
+        if (command.RoleId <= 0) throw new F9OperationException("角色ID不能为空");
+
+        var newEntity = new UserRole(snowflakeIdGenerator.CreateId(), command.UserId, command.RoleId);
+
+        var user = await userWriteRepository.GetByIdAsync(command.UserId);
+        if (user == null) throw new F9NotFoundException("用户", command.UserId);
+        user.AddRole(newEntity.Id);
+
+        var result = await userRoleWriteRepository.AssignAsync(newEntity);
+        if (result == false) throw new F9OperationException("权限", "绑定");
+
+        // 发布领域事件
+        foreach (var domainEvent in user.DomainEvents)
+            await eventBus.Publish(domainEvent, cancellationToken);
+        user.ClearDomainEvents();
+
+        return newEntity.Id;
+    }
+}
@@ -0,0 +1,35 @@
+using F9WebAiTest.Application.Common.Exceptions;
+using F9WebAiTest.Domain.Interfaces.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Commands;
+
+/// <summary>命令定义</summary>
+public record UserRole_RemoveCommand(long UserId, long RoleId) : IRequest<bool>;
+
+/// <summary>命令处理器</summary>
+public class UserRole_RemoveCommandHandler(
+    IUserWriteRepository userWriteRepository,
+    IUserRoleWriteRepository userRoleWriteRepository,
+    IPublisher eventBus) : IRequestHandler<UserRole_RemoveCommand, bool>
+{
+    public async Task<bool> Handle(UserRole_RemoveCommand command, CancellationToken cancellationToken)
+    {
+        if (command.UserId <= 0) throw new F9OperationException("用户ID不能为空");
+        if (command.RoleId <= 0) throw new F9OperationException("角色ID不能为空");
+
+        var user = await userWriteRepository.GetByIdAsync(command.UserId);
+        if (user == null) throw new F9NotFoundException("用户", command.UserId);
+        user.RemoveRole(command.RoleId);
+
+        var result = await userRoleWriteRepository.RemoveAsync(command.UserId, command.RoleId);
+        if (result == false) throw new F9OperationException("权限", "解绑");
+
+        // 发布领域事件
+        foreach (var domainEvent in user.DomainEvents)
+            await eventBus.Publish(domainEvent, cancellationToken);
+        user.ClearDomainEvents();
+
+        return result;
+    }
+}
@@ -0,0 +1,26 @@
+using F9WebAiTest.Application.Common.Exceptions;
+using F9WebAiTest.Domain.Interfaces.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Commands;
+
+/// <summary>命令定义</summary>
+public record User_ActiveOrDeactivateCommand(long Id, bool Active) : IRequest<bool>;
+
+/// <summary>命令处理器</summary>
+public class ActiveOrDeactivateUserCommandHandler(
+    IUserWriteRepository userWriteRepository) : IRequestHandler<User_ActiveOrDeactivateCommand, bool>
+{
+    public async Task<bool> Handle(User_ActiveOrDeactivateCommand command, CancellationToken cancellationToken)
+    {
+        var user = await userWriteRepository.GetByIdAsync(command.Id);
+        if (user == null) throw new F9NotFoundException("用户", command.Id);
+
+        if (command.Active) user.Activate();
+        else user.Deactivate();
+
+        var result = await userWriteRepository.ActiveOrDeactive(command.Id, user.IsActive);
+        if (result == false) throw new F9OperationException("启用/禁用", "操作");
+        return result;
+    }
+}
@@ -0,0 +1,73 @@
+using F9WebAiTest.Application.Common.Exceptions;
+using F9WebAiTest.Application.Interfaces.Security;
+using F9WebAiTest.Application.Interfaces.SnowflakeID;
+using F9WebAiTest.Application.Interfaces.UOW;
+using F9WebAiTest.Domain.Entities.SYS.Departments;
+using F9WebAiTest.Domain.Entities.SYS.RBAC;
+using F9WebAiTest.Domain.Interfaces.SYS.Departments;
+using F9WebAiTest.Domain.Interfaces.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Commands;
+
+/// <summary>命令定义</summary>
+public record User_CreateCommand(string UserName, string PhoneNumber, string LoginName, long DepartmentId, int SortOrder) : IRequest<long>;
+
+/// <summary>命令处理器</summary>
+public class CreateUserCommandHandler(
+    IUnitOfWork_F9 unitOfWork,
+    IUserWriteRepository userRepository,
+    IDepartmentWriteRepository departmentWriteRepository,
+    IDepartmentUserRepository departmentUserRepository,
+    IPasswordHasher passwordHasher,
+    ISnowflakeIdGenerator snowflakeIdGenerator,
+    IPublisher eventBus) : IRequestHandler<User_CreateCommand, long>
+{
+    public async Task<long> Handle(User_CreateCommand command, CancellationToken cancellationToken)
+    {
+        // 手写校验
+        if (string.IsNullOrWhiteSpace(command.UserName)) throw new F9OperationException("用户名不能为空");
+        if (string.IsNullOrWhiteSpace(command.LoginName)) throw new F9OperationException("登录名不能为空");
+        if (command.DepartmentId <= 0) throw new F9OperationException("部门不能为空");
+
+        User createdUser = null;
+        var ok = await unitOfWork.ExecuteWithUow(async () =>
+        {
+            // 1. 验证部门是否存在（应用层协调）
+            var department = await departmentWriteRepository.GetByIdAsync(command.DepartmentId, cancellationToken);
+            if (department == null) throw new F9NotFoundException("部门不存在");
+
+            // 2. 创建用户聚合根
+            var user = new User(
+                id: snowflakeIdGenerator.CreateId(),
+                command.UserName,
+                command.PhoneNumber,
+                command.LoginName,
+                command.DepartmentId,
+                command.SortOrder);
+
+            // 设置默认密码
+            var defaultPasswordMd5 = passwordHasher.GetMd5Hash(user.GetDefaultPasswordText());
+            var passwordHash = passwordHasher.HashPassword(defaultPasswordMd5);
+            user.SetPassword(passwordHash);
+
+            await userRepository.AddAsync(user);
+
+            // 3. 创建部门用户关联
+            var depUser = new DepartmentUser(snowflakeIdGenerator.CreateId(), command.DepartmentId, user.Id);
+            await departmentUserRepository.AssignAsync(depUser);
+
+            createdUser = user;
+            return true;
+        });
+
+        if (!ok) throw new F9OperationException("用户", "新增");
+
+        // 4. 事务提交后发布领域事件
+        foreach (var domainEvent in createdUser.DomainEvents)
+            await eventBus.Publish(domainEvent, cancellationToken);
+        createdUser.ClearDomainEvents();
+
+        return createdUser.Id;
+    }
+}
@@ -0,0 +1,22 @@
+using F9WebAiTest.Application.Common.Exceptions;
+using F9WebAiTest.Domain.Interfaces.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Commands;
+
+/// <summary>命令定义</summary>
+public record User_DelCommand(long Id) : IRequest<bool>;
+
+/// <summary>命令处理器</summary>
+public class DelUserCommandHandler(
+    IUserWriteRepository userWriteRepository) : IRequestHandler<User_DelCommand, bool>
+{
+    public async Task<bool> Handle(User_DelCommand command, CancellationToken cancellationToken)
+    {
+        if (command.Id <= 0) throw new F9OperationException("用户ID不能为空");
+
+        var result = await userWriteRepository.SoftDeleteAsync(command.Id);
+        if (result == false) throw new F9OperationException("用户", "删除");
+        return result;
+    }
+}
@@ -0,0 +1,32 @@
+using F9WebAiTest.Application.Common.Exceptions;
+using F9WebAiTest.Application.Interfaces.Security;
+using F9WebAiTest.Domain.Interfaces.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Commands;
+
+/// <summary>命令定义</summary>
+public record User_ResetPasswordCommand(long Id) : IRequest<bool>;
+
+/// <summary>命令处理器</summary>
+public class ResetPasswordUserCommandHandler(
+    IUserWriteRepository userWriteRepository,
+    IPasswordHasher passwordHasher) : IRequestHandler<User_ResetPasswordCommand, bool>
+{
+    public async Task<bool> Handle(User_ResetPasswordCommand command, CancellationToken cancellationToken)
+    {
+        if (command.Id <= 0) throw new F9OperationException("用户ID不能为空");
+
+        var dbUser = await userWriteRepository.GetByIdAsync(command.Id);
+        if (dbUser == null) throw new F9NotFoundException("用户", command.Id);
+
+        // 设置默认密码
+        var defaultPasswordMd5 = passwordHasher.GetMd5Hash(dbUser.GetDefaultPasswordText());
+        var passwordHash = passwordHasher.HashPassword(defaultPasswordMd5);
+        dbUser.SetPassword(passwordHash);
+
+        var result = await userWriteRepository.UpdatePassworkdAsync(command.Id, dbUser.PasswordHash);
+        if (result == false) throw new F9OperationException("用户", "重置密码");
+        return result;
+    }
+}
@@ -0,0 +1,49 @@
+using F9WebAiTest.Application.Common.Exceptions;
+using F9WebAiTest.Application.Interfaces.SnowflakeID;
+using F9WebAiTest.Application.Interfaces.UOW;
+using F9WebAiTest.Domain.Entities.SYS.Departments;
+using F9WebAiTest.Domain.Interfaces.SYS.Departments;
+using F9WebAiTest.Domain.Interfaces.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Commands;
+
+/// <summary>命令定义</summary>
+public record User_UpdateCommand(long Id, string UserName, string PhoneNumber, string LoginName, long DepartmentId, int SortOrder) : IRequest<bool>;
+
+/// <summary>命令处理器</summary>
+public class User_UpdateCommandHandler(
+    IUnitOfWork_F9 unitOfWork,
+    ISnowflakeIdGenerator snowflakeIdGenerator,
+    IUserWriteRepository userWriteRepository,
+    IDepartmentUserRepository departmentUserRepository) : IRequestHandler<User_UpdateCommand, bool>
+{
+    public async Task<bool> Handle(User_UpdateCommand command, CancellationToken cancellationToken)
+    {
+        if (command.Id <= 0) throw new F9OperationException("用户ID不能为空");
+        if (string.IsNullOrWhiteSpace(command.UserName)) throw new F9OperationException("用户名不能为空");
+        if (command.DepartmentId <= 0) throw new F9OperationException("部门不能为空");
+
+        return await unitOfWork.ExecuteWithUow(async () =>
+        {
+            // 获取数据库用户
+            var dbUser = await userWriteRepository.GetByIdAsync(command.Id);
+            if (dbUser == null) throw new F9NotFoundException("用户", command.Id);
+
+            // 移除原部门关系
+            await departmentUserRepository.RemoveAsync(dbUser.DepartmentId, dbUser.Id);
+
+            // 领域更新
+            dbUser.Update(command.UserName, command.PhoneNumber, command.LoginName, command.DepartmentId, command.SortOrder);
+
+            // 持久化
+            var result = await userWriteRepository.UpdateAsync(dbUser);
+
+            // 添加新部门关系
+            await departmentUserRepository.AssignAsync(new DepartmentUser(
+                snowflakeIdGenerator.CreateId(), dbUser.DepartmentId, dbUser.Id));
+
+            return result;
+        });
+    }
+}
@@ -0,0 +1,13 @@
+using F9WebAiTest.Application.Dtos.SYS.RBAC.Users;
+using F9WebAiTest.Application.Interfaces.Repositories.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Queries;
+
+public record GetUserByIdQuery(long id) : IRequest<UserReadDto_Edit>;
+
+public class GetUserByIdQueryHandler(IUserReadRepository userReadRepository) : IRequestHandler<GetUserByIdQuery, UserReadDto_Edit>
+{
+    public async Task<UserReadDto_Edit> Handle(GetUserByIdQuery query, CancellationToken ct)
+        => await userReadRepository.GetByIdAsync(query.id);
+}
@@ -0,0 +1,13 @@
+using F9WebAiTest.Application.Dtos.SYS.RBAC.Users;
+using F9WebAiTest.Application.Interfaces.Repositories.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Queries;
+
+public record GetUserByIdsQuery(List<long> Ids) : IRequest<List<UserReadDto_Edit>>;
+
+public class GetUserByIdsQueryHandler(IUserReadRepository userReadRepository) : IRequestHandler<GetUserByIdsQuery, List<UserReadDto_Edit>>
+{
+    public async Task<List<UserReadDto_Edit>> Handle(GetUserByIdsQuery query, CancellationToken ct)
+        => await userReadRepository.GetByIdsAsync(query.Ids);
+}
@@ -0,0 +1,14 @@
+using F9WebAiTest.Application.Dtos.Common;
+using F9WebAiTest.Application.Dtos.SYS.RBAC.Users;
+using F9WebAiTest.Application.Interfaces.Repositories.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Queries;
+
+public record GetUserPagedQuery(long DepartmentId, string Like, int Page = 1, int PageSize = 10) : IRequest<PagedResult<UserReadDto_View>>;
+
+public class GetUserPagedQueryHandler(IUserReadRepository userReadRepository) : IRequestHandler<GetUserPagedQuery, PagedResult<UserReadDto_View>>
+{
+    public async Task<PagedResult<UserReadDto_View>> Handle(GetUserPagedQuery query, CancellationToken ct)
+        => await userReadRepository.GetPagedAsync(query.DepartmentId, query.Like, query.Page, query.PageSize);
+}
@@ -0,0 +1,13 @@
+using F9WebAiTest.Application.Dtos.SYS.RBAC.Users;
+using F9WebAiTest.Application.Interfaces.Repositories.SYS.RBAC.Users;
+using MediatR;
+
+namespace F9WebAiTest.Application.CQRS.SYS.RBAC.Users.Queries;
+
+public record GetUserRolesByUserIdQuery(long UserId) : IRequest<List<UserRoleReadDto_Cache>>;
+
+public class GetUserRolesByUserIdQueryHandler(IUserReadRepository userReadRepository) : IRequestHandler<GetUserRolesByUserIdQuery, List<UserRoleReadDto_Cache>>
+{
+    public async Task<List<UserRoleReadDto_Cache>> Handle(GetUserRolesByUserIdQuery query, CancellationToken ct)
+        => await userReadRepository.GetUserRolesByUserId(query.UserId);
+}