feat: 站点提交/返回统一支持多名称多地址数组

- POST /sites/{id}/submit: names[]/urls[] 数组，兼容旧 name/baseUrl 单值
- 已有站点合并新名称/地址（去重+前置）
- 站点列表返回 names[]/urls[]
- API 文档和代码示例同步更新

par-api/src/main/java/com/par/api/controller/SiteController.java

@@ -66,8 +66,8 @@ public class SiteController {
     }
 
     /**
-     * 提交站点收录（需 HMAC 鉴权）
-     * 创建或更新站点信息，自动设置为活跃状态
+     * 提交站点收录（需 PSK 鉴权）
+     * 支持 names[]/urls[] 数组或 name/baseUrl 单值（向后兼容）
      */
     @PostMapping("/{siteId}/submit")
     public ApiResponse<SiteDTO> submitSite(
@@ -75,22 +75,31 @@ public class SiteController {
             @RequestBody Map<String, Object> payload,
             HttpServletRequest request) {
 
-        String name = (String) payload.get("name");
+        @SuppressWarnings("unchecked")
+        List<String> names = (List<String>) payload.get("names");
+        @SuppressWarnings("unchecked")
+        List<String> urls = (List<String>) payload.get("urls");
+        // 向后兼容单值
+        if ((names == null || names.isEmpty()) && payload.containsKey("name")) {
+            names = List.of((String) payload.get("name"));
+        }
+        if ((urls == null || urls.isEmpty()) && payload.containsKey("baseUrl")) {
+            urls = List.of((String) payload.get("baseUrl"));
+        }
+
+        if (names == null || names.isEmpty()) {
+            return ApiResponse.error(400, "names or name is required");
+        }
+        if (urls == null || urls.isEmpty()) {
+            return ApiResponse.error(400, "urls or baseUrl is required");
+        }
+
         String description = (String) payload.get("description");
-        String baseUrl = (String) payload.get("baseUrl");
         String iconUrl = (String) payload.get("iconUrl");
         String siteType = (String) payload.get("siteType");
-
-        if (name == null || name.isBlank()) {
-            return ApiResponse.error(400, "name is required");
-        }
-        if (baseUrl == null || baseUrl.isBlank()) {
-            return ApiResponse.error(400, "baseUrl is required");
-        }
-
         Long submitterId = (Long) request.getAttribute("accountId");
 
-        Site site = siteService.submitSite(siteId, name, description, baseUrl, iconUrl, siteType, submitterId);
+        Site site = siteService.submitSite(siteId, names, urls, description, iconUrl, siteType, submitterId);
         return ApiResponse.success(siteService.toDTO(site));
     }