feat(user): 完善用户注册时的角色分配机制

- 在邀请注册流程中支持传递roleId参数
- 实现角色分配逻辑：优先使用传入的roleId，其次使用roleCode，默认为"user"
- 添加租户验证确保角色属于当前租户
- 修复缺失默认角色时的创建机制
- 确保注册响应中包含用户的角色和权限信息

src/main/java/com/gxwebsoft/common/system/controller/MainController.java

@@ -654,6 +654,8 @@ public class MainController extends BaseController {
         userParam.setUsername(username);
         userParam.setNickname(DesensitizedUtil.mobilePhone(phone));
         userParam.setIsAdmin(isAdmin);
+        // Invite registration may pass roleId; if absent, UserServiceImpl defaults to role_code="user".
+        userParam.setRoleId(user.getRoleId());
         if (user.getTemplateId() != null) {
           userParam.setTemplateId(user.getTemplateId());
         }
@@ -800,6 +802,8 @@ public class MainController extends BaseController {
     final UserParam userParam = new UserParam();
     userParam.setPhone(phone);
     userParam.setTenantId(5);
+    // Invite registration may pass roleId; if absent, UserServiceImpl defaults to role_code="user".
+    userParam.setRoleId(user.getRoleId());
     if(user.getIndustryParent() != null){
       userParam.setIndustryParent(user.getIndustryParent());
       userParam.setIndustryChild(user.getIndustryChild());

src/main/java/com/gxwebsoft/common/system/service/impl/UserServiceImpl.java

@@ -276,24 +276,40 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
         }
         addUser.setTenantId(userParam.getTenantId());
         addUser.setRecommend(0);
-        // Pick the default "user" role for the tenant. If it doesn't exist (fresh DB / incomplete init),
-        // create it to avoid NPE during registration/login.
-        QueryWrapper<Role> roleQw = new QueryWrapper<Role>().eq("role_code", "admin");
-        if (addUser.getTenantId() != null) {
-            roleQw.eq("tenant_id", addUser.getTenantId());
+        // Role assignment:
+        // - If roleId is provided (e.g. invite flow), use it (must belong to the same tenant).
+        // - Otherwise, fall back to roleCode; default to "user".
+        Role role = null;
+        if (userParam.getRoleId() != null) {
+            role = roleService.getById(userParam.getRoleId());
+            if (role != null
+                    && addUser.getTenantId() != null
+                    && role.getTenantId() != null
+                    && !addUser.getTenantId().equals(role.getTenantId())) {
+                throw new BusinessException("角色不属于当前租户");
+            }
         }
-        Role role = roleService.getOne(roleQw, false);
-        if (role == null && addUser.getTenantId() != null) {
-            Role defaultRole = new Role();
-            defaultRole.setRoleName("注册用户");
-            defaultRole.setRoleCode("user");
-            defaultRole.setComments("普通注册用户");
-            defaultRole.setTenantId(addUser.getTenantId());
-            roleService.save(defaultRole);
-            role = defaultRole;
+        String roleCode = userParam.getRoleCode();
+        if (role == null) {
+            roleCode = StrUtil.blankToDefault(roleCode, "user");
+            QueryWrapper<Role> roleQw = new QueryWrapper<Role>().eq("role_code", roleCode);
+            if (addUser.getTenantId() != null) {
+                roleQw.eq("tenant_id", addUser.getTenantId());
+            }
+            role = roleService.getOne(roleQw, false);
+            // If the default "user" role is missing (fresh DB / incomplete init), create it to avoid empty roles.
+            if (role == null && addUser.getTenantId() != null && "user".equals(roleCode)) {
+                Role defaultRole = new Role();
+                defaultRole.setRoleName("注册用户");
+                defaultRole.setRoleCode("user");
+                defaultRole.setComments("普通注册用户");
+                defaultRole.setTenantId(addUser.getTenantId());
+                roleService.save(defaultRole);
+                role = defaultRole;
+            }
         }
         if (role == null) {
-            throw new BusinessException("缺少默认角色(role_code=user)，请先初始化角色");
+            throw new BusinessException("缺少默认角色(role_code=" + (roleCode == null ? "user" : roleCode) + ")，请先初始化角色");
         }
         addUser.setRoleId(role.getRoleId());
         if (saveUser(addUser)) {
@@ -304,6 +320,9 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
             userRole.setRoleId(addUser.getRoleId());
             userRoleService.save(userRole);
         }
+        // Ensure caller (e.g. register / invite register) gets non-empty roles/authorities in response.
+        addUser.setRoles(userRoleService.listByUserId(addUser.getUserId()));
+        addUser.setAuthorities(roleMenuService.listMenuByUserId(addUser.getUserId(), null));
         return addUser;
     }