diff --git a/interfaces/admin/static/chat.html b/interfaces/admin/static/chat.html
index 67c9b122..880176bd 100644
--- a/interfaces/admin/static/chat.html
+++ b/interfaces/admin/static/chat.html
@@ -574,7 +574,7 @@
     <script defer src="/admin/assets/admin-theme.js"></script>
     <script
       defer
-      src="/admin/assets/chat.js?v=20260510-2"
+      src="/admin/assets/chat.js?v=20260511-1"
       onerror="(function(){var s=document.getElementById('chat-boot-splash');if(s){s.querySelector('.chat-boot-splash__title span:last-child').textContent='无法加载 chat.js';s.querySelector('.chat-boot-splash__muted').textContent='请确认网关已启动且 /admin/assets/chat.js 可访问。';}})()"
     ></script>
   </head>
diff --git a/interfaces/admin/static/chat.js b/interfaces/admin/static/chat.js
index 9c168406..5bc24a47 100644
--- a/interfaces/admin/static/chat.js
+++ b/interfaces/admin/static/chat.js
@@ -384,7 +384,8 @@ const CONFIRM_STRATEGY_AUTO = "auto";
 const CONFIRM_STRATEGY_OFF = "off";
 const PLAN_AGENT_V1 = "v1";
 const PLAN_AGENT_V2 = "v2";
-const ADMIN_CHAT_SHOW_TOOL_OUTPUT_DEFAULT = false;
+/** Default on: reasoning/tool fold matches streamed behavior; new browsers have no localStorage yet. */
+const ADMIN_CHAT_SHOW_TOOL_OUTPUT_DEFAULT = true;
 const REASONING_BLOCK_MAX_CHARS = 12000;
 const CHAT_ENABLE_WIKI_EVENT_POLLER = false;
 const _rt = String(localStorage.getItem(CHAT_REASONING_TOGGLE_KEY) || "").trim().toLowerCase();