fix: use UserRole.valueOf() in createUser and updateUser to support all role values

backend/src/main/java/com/yimeng/okr/service/OrganizationService.java

@@ -139,10 +139,15 @@ public class OrganizationService {
             user.setDepartmentId(Long.valueOf(body.get("departmentId").toString()));
         if (body.containsKey("superiorId") && body.get("superiorId") != null)
             user.setSuperiorId(Long.valueOf(body.get("superiorId").toString()));
-        if (body.containsKey("role") && "SUPER_ADMIN".equals(body.get("role").toString()))
-            user.setRole(UserRole.SUPER_ADMIN);
-        else
+        if (body.containsKey("role") && body.get("role") != null) {
+            try {
+                user.setRole(UserRole.valueOf(body.get("role").toString()));
+            } catch (IllegalArgumentException e) {
+                throw new BusinessException("无效角色: " + body.get("role"));
+            }
+        } else {
             user.setRole(UserRole.EMPLOYEE);
+        }
         userMapper.insert(user);
         return UserInfo.from(user);
     }
@@ -156,8 +161,13 @@ public class OrganizationService {
             user.setDepartmentId(Long.valueOf(body.get("departmentId").toString()));
         if (body.containsKey("superiorId") && body.get("superiorId") != null)
             user.setSuperiorId(Long.valueOf(body.get("superiorId").toString()));
-        if (body.containsKey("role"))
-            user.setRole("SUPER_ADMIN".equals(body.get("role").toString()) ? UserRole.SUPER_ADMIN : UserRole.EMPLOYEE);
+        if (body.containsKey("role")) {
+            try {
+                user.setRole(UserRole.valueOf(body.get("role").toString()));
+            } catch (IllegalArgumentException e) {
+                throw new BusinessException("无效角色: " + body.get("role"));
+            }
+        }
         if (body.containsKey("password") && !body.get("password").toString().isEmpty())
             user.setPasswordHash(passwordEncoder.encode(body.get("password").toString()));
         userMapper.updateById(user);