fix: UC subdirectory listing fails due to missing stoken parameter

When the frontend requests subdirectory contents for UC drive shares, the
stoken query parameter is mishandled in two places, breaking directory browsing:

1. URLParamUtil.handleTruncatedUrl() does not exclude stoken from the URL
   construction loop. As a result, the stoken value gets appended to the share
   URL (e.g. https://drive.uc.cn/s/xxx?stoken=yyy). The extra query string
   breaks the UC URL regex match in PanDomainTemplate, causing the parser to
   fall back to the default IPanTool.parseFileList() which returns
   "Not implemented yet".

2. ParserApi.getFileList() does not accept stoken as a method parameter and
   does not forward it to ShareLinkInfo.otherParam. Even when the stoken is
   present in the request URL, UcTool.parseFileList() cannot find it and must
   re-authenticate against the UC API — which fails without proper auth cookies.

The fix:
- URLParamUtil: add stoken to the param exclusion list
- ParserApi: add String stoken parameter and put it into otherParam

Both first-level and nested directory listing work correctly after this fix.

web-service/src/main/java/cn/qaiu/lz/common/util/URLParamUtil.java

@@ -70,7 +70,7 @@ public class URLParamUtil {
         for (String paramName : params.names()) {
             // 忽略 "url", "pwd", "dirId", "uuid", "auth" 参数（这些参数单独处理，不应拼接到分享URL中）
             if (!paramName.equals("url") && !paramName.equals("pwd") && !paramName.equals("dirId") 
-                    && !paramName.equals("uuid") && !paramName.equals("auth")) {
+                    && !paramName.equals("uuid") && !paramName.equals("auth") && !paramName.equals("stoken")) {
                 if (firstParam) {
                     urlBuilder.append("?");
                     firstParam = false;

web-service/src/main/java/cn/qaiu/lz/web/controller/ParserApi.java

@@ -161,7 +161,7 @@ public class ParserApi {
 
     @RouteMapping("/getFileList")
     public Future<List<FileInfo>> getFileList(HttpServerRequest request, String pwd, String dirId, String uuid,
-                                             String auth) {
+                                             String stoken, String auth) {
         String url = URLParamUtil.parserParams(request);
         ParserCreate parserCreate;
         try {
@@ -176,6 +176,9 @@ public class ParserApi {
         if (StringUtils.isNotBlank(dirId)) {
             parserCreate.getShareLinkInfo().getOtherParam().put("dirId", dirId);
         }
+        if (StringUtils.isNotBlank(stoken)) {
+            parserCreate.getShareLinkInfo().getOtherParam().put("stoken", stoken);
+        }
         if (StringUtils.isNotBlank(uuid)) {
             parserCreate.getShareLinkInfo().getOtherParam().put("uuid", uuid);
         }