feat: 在用户列表展示角色信息

- 分页批量补全用户关联角色名称，避免逐行查询

- 支持多角色标签、溢出数量和完整信息提示

easyflow-api/easyflow-api-admin/src/main/java/tech/easyflow/admin/controller/system/SysAccountController.java

@@ -139,7 +139,51 @@ public class SysAccountController extends BaseCurdController<SysAccountService,
     @Override
     @LogRecord("分页查询")
     protected Page<SysAccount> queryPage(Page<SysAccount> page, QueryWrapper queryWrapper) {
-        return service.getMapper().paginateWithRelations(page, queryWrapper);
+        Page<SysAccount> result = service.getMapper().paginateWithRelations(page, queryWrapper);
+        fillRoleNames(result.getRecords());
+        return result;
+    }
+
+    /**
+     * 按当前分页内的角色 ID 批量补全角色名称。
+     *
+     * @param accounts 当前页账号
+     */
+    private void fillRoleNames(List<SysAccount> accounts) {
+        if (accounts == null || accounts.isEmpty()) {
+            return;
+        }
+        Set<BigInteger> roleIds = accounts.stream()
+                .map(SysAccount::getRoleIds)
+                .filter(java.util.Objects::nonNull)
+                .flatMap(Collection::stream)
+                .filter(java.util.Objects::nonNull)
+                .collect(Collectors.toCollection(LinkedHashSet::new));
+        if (roleIds.isEmpty()) {
+            accounts.forEach(account -> account.setRoleNames(List.of()));
+            return;
+        }
+
+        Map<BigInteger, String> roleNameMap = sysRoleService.listByIds(roleIds).stream()
+                .filter(role -> role.getId() != null && StringUtil.hasText(role.getRoleName()))
+                .collect(Collectors.toMap(
+                        SysRole::getId,
+                        SysRole::getRoleName,
+                        (first, ignored) -> first
+                ));
+        accounts.forEach(account -> {
+            List<BigInteger> accountRoleIds = account.getRoleIds();
+            if (accountRoleIds == null || accountRoleIds.isEmpty()) {
+                account.setRoleNames(List.of());
+                return;
+            }
+            List<String> roleNames = accountRoleIds.stream()
+                    .map(roleNameMap::get)
+                    .filter(StringUtil::hasText)
+                    .distinct()
+                    .collect(Collectors.toList());
+            account.setRoleNames(roleNames);
+        });
     }
 
     @Override