fix: 补全管理后台缺失的 API 端点 + 修复 @RequestParam 参数名

- AdminController: 新增 GET /admin/accounts 用户列表
- ConfigController: 新增 GET /configs/pending 待审核列表
- AdminController: 修复 @RequestParam 缺少参数名导致参数绑定失败
- SiteConfigMapper/ConfigService: 新增 selectPending/listPendingConfigs

par-core/src/main/java/com/par/core/mapper/SiteConfigMapper.java

@@ -23,4 +23,7 @@ public interface SiteConfigMapper extends BaseMapper<SiteConfig> {
 
     @Update("UPDATE site_configs SET is_latest = 0 WHERE site_id = #{siteId} AND is_latest = 1 AND deleted = 0")
     int clearLatestFlag(@Param("siteId") String siteId);
+
+    @Select("SELECT * FROM site_configs WHERE status = 'pending' AND deleted = 0 ORDER BY created_at DESC")
+    List<SiteConfig> selectPending();
 }

par-core/src/main/java/com/par/core/service/ConfigService.java

@@ -15,6 +15,11 @@ public interface ConfigService {
      */
     SiteConfig getLatestConfig(String siteId);
 
+    /**
+     * 获取所有待审核配置
+     */
+    List<SiteConfig> listPendingConfigs();
+
     /**
      * 获取站点所有已批准配置版本
      */

par-core/src/main/java/com/par/core/service/impl/ConfigServiceImpl.java

@@ -37,6 +37,11 @@ public class ConfigServiceImpl implements ConfigService {
         return siteConfigMapper.selectLatestBySiteId(siteId);
     }
 
+    @Override
+    public List<SiteConfig> listPendingConfigs() {
+        return siteConfigMapper.selectPending();
+    }
+
     @Override
     public List<SiteConfigDTO> listApprovedConfigs(String siteId) {
         return siteConfigMapper.selectApprovedBySiteId(siteId)