feat: 展示 AI 资源创建人信息

- 为 Bot、工作流、知识库、插件列表补充创建人名称回填

- 在卡片中展示创建者与创建时间

- 补充后端与前端对应测试

easyflow-modules/easyflow-module-system/src/main/java/tech/easyflow/system/service/SysAccountService.java

@@ -10,6 +10,7 @@ import tech.easyflow.system.entity.vo.SysAccountImportResultVo;
 import java.io.OutputStream;
 import java.math.BigInteger;
 import java.util.Collection;
+import java.util.Map;
 
 /**
  * 用户表 服务层。
@@ -19,6 +20,14 @@ import java.util.Collection;
  */
 public interface SysAccountService extends IService<SysAccount> {
 
+    /**
+     * 批量解析账号展示名称。
+     *
+     * @param accountIds 账号 ID 集合
+     * @return 账号 ID 到展示名称的映射，名称优先使用昵称，其次登录名，最后回退为 ID 字符串
+     */
+    Map<BigInteger, String> resolveDisplayNameMap(Collection<BigInteger> accountIds);
+
     void syncRelations(SysAccount entity);
 
     SysAccount getByUsername(String userKey);

easyflow-modules/easyflow-module-system/src/main/java/tech/easyflow/system/service/impl/SysAccountServiceImpl.java

@@ -55,6 +55,7 @@ import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 import java.util.function.Function;
 
@@ -110,6 +111,57 @@ public class SysAccountServiceImpl extends ServiceImpl<SysAccountMapper, SysAcco
     @Resource
     private PlatformTransactionManager transactionManager;
 
+    /**
+     * 批量解析账号展示名称。
+     *
+     * @param accountIds 账号 ID 集合
+     * @return 账号 ID 到展示名称的映射
+     */
+    @Override
+    public Map<BigInteger, String> resolveDisplayNameMap(Collection<BigInteger> accountIds) {
+        if (accountIds == null || accountIds.isEmpty()) {
+            return Collections.emptyMap();
+        }
+        LinkedHashSet<BigInteger> normalizedIds = accountIds.stream()
+                .filter(Objects::nonNull)
+                .collect(java.util.stream.Collectors.toCollection(LinkedHashSet::new));
+        if (normalizedIds.isEmpty()) {
+            return Collections.emptyMap();
+        }
+
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .select(SysAccount::getId, SysAccount::getNickname, SysAccount::getLoginName)
+                .in(SysAccount::getId, normalizedIds);
+        List<SysAccount> accounts = list(queryWrapper);
+        LinkedHashMap<BigInteger, String> displayNameMap = new LinkedHashMap<>(normalizedIds.size());
+        for (SysAccount account : accounts) {
+            if (account == null || account.getId() == null) {
+                continue;
+            }
+            displayNameMap.put(account.getId(), resolveDisplayName(account));
+        }
+        normalizedIds.forEach(id -> displayNameMap.putIfAbsent(id, id.toString()));
+        return displayNameMap;
+    }
+
+    /**
+     * 解析单个账号的展示名称。
+     *
+     * @param account 账号实体
+     * @return 展示名称
+     */
+    private String resolveDisplayName(SysAccount account) {
+        String nickname = trimToNull(account.getNickname());
+        if (StringUtil.hasText(nickname)) {
+            return nickname;
+        }
+        String loginName = trimToNull(account.getLoginName());
+        if (StringUtil.hasText(loginName)) {
+            return loginName;
+        }
+        return account.getId() == null ? "" : account.getId().toString();
+    }
+
     @Override
     @Transactional(rollbackFor = Exception.class)
     public void syncRelations(SysAccount entity) {