feat: 更改节点测速

lib/app/services/singbox_imp/kr_sing_box_imp.dart

@@ -642,15 +642,7 @@ class KRSingBoxImp {
       "enable-fake-dns": false,
       "enable-dns-routing": true,
       "independent-dns-cache": true,
-      "rules": [
-        // ✅ 自定义域名直连规则 - 添加到 HiddifyOptions.Rules 中
-        // 这样 Native 层的 config.BuildConfig() 会将其包含到最终配置
-        // 注意：libcore 要求 domains 字段使用前缀格式，如 "domain:ip.sb" 表示 domain_suffix
-        {
-          "domains": "domain:api.hifast.biz",  // domain: 前缀表示 domain_suffix 匹配
-          "outbound": "bypass"  // bypass = direct
-        }
-      ],
+      "rules": _kr_buildHiddifyRules(),
       "mux": {
         "enable": false,
         "padding": false,
@@ -709,6 +701,57 @@ class KRSingBoxImp {
     return op;
   }
 
+  List<Map<String, dynamic>> _kr_buildHiddifyRules() {
+    final rules = <Map<String, dynamic>>[];
+    rules.add({
+      "domains": "domain:api.hifast.biz",
+      "outbound": "bypass"
+    });
+
+    final nodeDomains = _kr_collectNodeDomains();
+    for (final d in nodeDomains) {
+      rules.add({
+        "domains": "domain:$d",
+        "outbound": "bypass"
+      });
+    }
+
+    KRLogUtil.kr_i('✅ 节点域名白名单数量: ${nodeDomains.length}', tag: 'SingBox');
+    KRLogUtil.kr_i('✅ 节点域名白名单集合: ${jsonEncode(nodeDomains.toList())}', tag: 'SingBox');
+    return rules;
+  }
+
+  Set<String> _kr_collectNodeDomains() {
+    final set = <String>{};
+
+    void addFromOutbound(Map<String, dynamic> o) {
+      final server = o['server']?.toString();
+      if (server != null && server.isNotEmpty && InternetAddress.tryParse(server) == null) {
+        set.add(server.toLowerCase());
+      }
+
+      final tls = o['tls'];
+      if (tls is Map) {
+        final sni = tls['server_name']?.toString();
+        if (sni != null && sni.isNotEmpty && InternetAddress.tryParse(sni) == null) {
+          set.add(sni.toLowerCase());
+        }
+      }
+    }
+
+    for (final g in kr_outbounds) {
+       addFromOutbound(g);
+    }
+
+    for (final g in Kr_allOutbounds) {
+      for (final it in g.outboundList) {
+        addFromOutbound(it.config);
+      }
+    }
+
+    return set;
+  }
+
   /// 动态构建 DNS 配置
   ///
   /// - 真机：使用远程 DoH + 本地系统 DNS，final 指向远程