first commit

backend/F9WebAiTest.Application/Interfaces/LoginUsers/ILoginUserService.cs

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+using F9WebAiTest.Application.Contracts;
+
+namespace F9WebAiTest.Application.Interfaces.LoginUsers;
+
+/// <summary>登录用户服务（从当前请求上下文获取登录用户信息）</summary>
+public interface ILoginUserService
+{
+    /// <summary>登录用户信息</summary>
+    LoginUserInfo LoginUserInfo { get; }
+}

backend/F9WebAiTest.Application/Interfaces/Repositories/SYS/Departments/IDepartmentReadRepository.cs

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+using F9WebAiTest.Application.Dtos.SYS.Departments;
+using F9WebAiTest.Domain.Interfaces;
+
+namespace F9WebAiTest.Application.Interfaces.Repositories.SYS.Departments;
+
+/// <summary>部门读仓储（返回读模型 DTO）</summary>
+public interface IDepartmentReadRepository : IDInterface
+{
+    Task<List<DepartmentReadDto_View>> GetAllAsync();
+}

backend/F9WebAiTest.Application/Interfaces/Repositories/SYS/RBAC/Menus/IMenuReadRepository.cs

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+using F9WebAiTest.Application.Dtos.SYS.RBAC.Menus;
+using F9WebAiTest.Domain.Interfaces;
+
+namespace F9WebAiTest.Application.Interfaces.Repositories.SYS.RBAC.Menus;
+
+/// <summary>菜单读仓储（返回读模型 DTO）</summary>
+public interface IMenuReadRepository : IDInterface
+{
+    Task<MenuReadDto_Menu_Edit?> GetMenuByIdForEditAsync(long id);
+    Task<bool> ExistMenuByTypeFullnameExcludeIdAsync(string typeFullname, long? excludeId);
+
+    Task<List<MenuReadDto_Menu_Table>> GetAllMenuAsync(string like, long? parentId);
+    Task<List<MenuReadDto_Menu_Table>> GetTreeMenuAsync();
+}

backend/F9WebAiTest.Application/Interfaces/Repositories/SYS/RBAC/Roles/IRoleReadRepository.cs

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+using F9WebAiTest.Application.Dtos.SYS.RBAC.Roles;
+using F9WebAiTest.Domain.Enums.SYS.RBAC;
+using F9WebAiTest.Domain.Interfaces;
+
+namespace F9WebAiTest.Application.Interfaces.Repositories.SYS.RBAC.Roles;
+
+/// <summary>角色读仓储（返回读模型 DTO）</summary>
+public interface IRoleReadRepository : IDInterface
+{
+    /// <summary>查询单个</summary>
+    Task<RoleReadDto_Edit> GetByIdAsync(long id);
+
+    /// <summary>获取所有对象集合</summary>
+    Task<List<RoleReadDto_View>> GetAllAsync();
+
+    /// <summary>获取所有对象集合（缓存用）</summary>
+    Task<List<RoleReadDto_Cache>> GetAllForCacheAsync();
+
+    /// <summary>通过资源类型获取角色权限集合</summary>
+    Task<List<RolePermissionReadDto_View>> GetRolePermissionsByResourceType(long roleId, Resource_Type_Enum resourceType);
+}

backend/F9WebAiTest.Application/Interfaces/Repositories/SYS/RBAC/Users/IUserReadRepository.cs

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+using F9WebAiTest.Application.Dtos.Common;
+using F9WebAiTest.Application.Dtos.SYS.RBAC.Users;
+using F9WebAiTest.Domain.Interfaces;
+
+namespace F9WebAiTest.Application.Interfaces.Repositories.SYS.RBAC.Users;
+
+/// <summary>用户读仓储（返回读模型 DTO）</summary>
+public interface IUserReadRepository : IDInterface
+{
+    // 单个用户查询
+    Task<UserReadDto_Edit> GetByIdAsync(long id);
+
+    // 通过 ID 集合查询用户集合
+    Task<List<UserReadDto_Edit>> GetByIdsAsync(List<long> ids);
+
+    // 通过登录名查询
+    Task<UserReadDto_Login> GetByLoginNameAsync(string loginName);
+
+    // 通过电话查询
+    Task<UserReadDto_Login> GetByPhoneAsync(string phone);
+
+    // 条件分页查询
+    Task<PagedResult<UserReadDto_View>> GetPagedAsync(long departmentId, string like, int page = 1, int pageSize = 10);
+
+    // 获取用户绑定角色集合
+    Task<List<UserRoleReadDto_Cache>> GetUserRolesByUserId(long userId);
+
+    // 通过角色 ID 集合查询用户集合
+    Task<List<UserReadDto_Edit>> GetByRoleIdsAsync(List<long> roleIds);
+}

backend/F9WebAiTest.Application/Interfaces/Security/IPasswordHasher.cs

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+namespace F9WebAiTest.Application.Interfaces.Security;
+
+/// <summary>密码哈希服务</summary>
+public interface IPasswordHasher
+{
+    string Hash256(string input);
+    string GetMd5Hash(string input);
+    string HashPassword(string password);
+    bool VerifyPassword(string password, string hashedPassword);
+}

backend/F9WebAiTest.Application/Interfaces/SnowflakeID/ISnowflakeIdGenerator.cs

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+namespace F9WebAiTest.Application.Interfaces.SnowflakeID;
+
+/// <summary>雪花 ID 生成器（ID 生成属于应用能力，故接口放在应用层）</summary>
+public interface ISnowflakeIdGenerator
+{
+    long CreateId();
+}

backend/F9WebAiTest.Application/Interfaces/UOW/IUnitOfWork_F9.cs

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+namespace F9WebAiTest.Application.Interfaces.UOW;
+
+/// <summary>工作单元：在事务内执行一组操作（简化版，替代 F9 的 Begin/Commit/Rollback）</summary>
+public interface IUnitOfWork_F9
+{
+    /// <summary>在事务内执行操作，返回是否提交成功（异常自动回滚）</summary>
+    Task<bool> ExecuteWithUow(Func<Task<bool>> func);
+}