fix: NPE 修复、资源泄漏修复及其他 Bug 修复

- 修复 12 处 NPE 风险: FjTool/FsTool/IzTool/LzTool/MkwTool/P115Tool/PdbTool/QQTool/ParserCreate/CommonUtils/ShareLinkInfo/URLParamUtil
- 修复 4 处 Vert.x 资源泄漏: 测试类中 Vertx 实例未关闭
- 修复 CacheManager 防重入和 registerPeriodicCleanup 就绪检查
- 修复 ParserApi 中 redirectUrl()/viewUrl() Promise 未 complete
- 修复 CacheManager.updateTotalByField Promise 永不完成
- 修复 AppMain ShutdownHook 注册，确保 Vert.x 先于 JDBCPoolInit 关闭
- 修复 RouterHandlerFactory failureHandler 恢复返回 failure message
- 修复 ParserCreate/LzTool 收窄 catch 异常类型
- 修复 IzTool/FjTool/IzToolWithAuth 并发安全 (volatile + header 副本)
- 修复 P115Tool UA 为 null 时的 NPE，添加默认 User-Agent
- Font Awesome CDN 换源为 s4.zstatic.net，避免 bootcdn 投毒风险
- DirectoryTree selectAll 补 parserUrl 检查，Home 组件名 App→Home

core/src/main/java/cn/qaiu/vx/core/verticle/RouterVerticle.java

@@ -23,12 +23,11 @@ public class RouterVerticle extends AbstractVerticle {
     private static final Logger LOGGER = LoggerFactory.getLogger(RouterVerticle.class);
 
     private static final int port = SharedDataUtil.getValueForServerConfig("port");
-    private static final Router router = new RouterHandlerFactory(
-            SharedDataUtil.getJsonStringForServerConfig("contextPath")).createRouter();
 
     private static final JsonObject globalConfig = SharedDataUtil.getJsonConfig("globalConfig");
 
     private HttpServer server;
+    private Router router;
 
     static {
         LOGGER.info(JacksonConfig.class.getSimpleName() + " >> ");
@@ -61,6 +60,8 @@ public class RouterVerticle extends AbstractVerticle {
                .setReuseAddress(true)                     // 允许地址重用
                .setReusePort(true);                       // 允许端口重用
         
+        router = new RouterHandlerFactory(
+                SharedDataUtil.getJsonStringForServerConfig("contextPath")).createRouter();
         server = vertx.createHttpServer(options);
 
         server.requestHandler(router).webSocketHandler(s->{}).listen()