diff --git a/internal/plugins/webui/dashboard.html b/internal/plugins/webui/dashboard.html
index dc4aebd..41dda63 100644
--- a/internal/plugins/webui/dashboard.html
+++ b/internal/plugins/webui/dashboard.html
@@ -3164,11 +3164,21 @@ background:
         badge.style.display = "none";
       }
 
-      function rerenderChat() {
-        renderChat();
-        renderChatStarmap();
-        renderTerminals();
-        renderCmdHistory();
+      // 流式渲染防抖：SSE 高频推送时合并为一次重建，避免每个 chunk 全量 innerHTML。
+      // 聊天内容变化 → 短超时后只重渲聊天（跳过星图/终端/命令历史等无关重建）。
+      var _rerenderTimer = null;
+      function rerenderChat(full) {
+        if (_rerenderTimer) clearTimeout(_rerenderTimer);
+        // 流式增量（非全量）走短防抖，仅重渲聊天；工具调用/历史变化等需全量重渲
+        _rerenderTimer = setTimeout(function () {
+          _rerenderTimer = null;
+          renderChat();
+          if (full) {
+            renderChatStarmap();
+            renderTerminals();
+            renderCmdHistory();
+          }
+        }, 90);
       }
       function toggleToolCall(el) {
         var d = el.querySelector(".tc-detail");
@@ -3576,36 +3586,40 @@ background:
         state.chatFinalIdx = -1;
         state.messages.push({ role: "user", content: text });
         inp.value = "";
-        rerenderChat();
+        rerenderChat(true);
         state.chatLoading = true;
         state.chatStage = __("等待AI回复...", "Waiting for AI...");
         btn.disabled = true;
         btn.textContent = "";
-        rerenderChat();
+        rerenderChat(true);
+        // 触发式 POST：短超时仅确认受理；回复靠 SSE 流式渲染（对齐 GUI 行为）。
+        // 长 LLM 工具链不再因同步等全量响应而 60s 超时报错。
         try {
-          var r = await api("/chat", {
-            method: "POST",
-            body: JSON.stringify({ message: text }),
-          });
+          var ctrl = new AbortController();
+          var acked = false; // 受理确认是否在超时内返回
+          var ackTimer = setTimeout(function () {
+            if (!acked) ctrl.abort();
+          }, 15000);
+          var r = null;
+          try {
+            r = await api("/chat", {
+              method: "POST",
+              body: JSON.stringify({ message: text }),
+              signal: ctrl.signal,
+            });
+            acked = true;
+          } catch (ackErr) {
+            if (acked) throw ackErr;
+            // 受理确认超时：agent 已在后台处理，保持 loading 等待 SSE 流式回包
+            console.log("[sendChat] ack timeout (15s), waiting for SSE stream");
+            state.chatStage = __("AI 处理中...（长任务，请稍候）", "AI processing... (long task)");
+            return; // 保持 chatLoading=true；SSE 完成事件负责收尾
+          } finally {
+            clearTimeout(ackTimer);
+          }
           state.chatStage = "";
           var last = state.messages[state.messages.length - 1];
-          console.log(
-            "[sendChat] POST returned, last msg:",
-            last
-              ? {
-                  role: last.role,
-                  _streaming: last._streaming,
-                  _final: last._final,
-                  tool_calls: last.tool_calls?.length,
-                  content_len: last.content?.length,
-                }
-              : null,
-          );
           if (last && last.role === "assistant" && last._streaming) {
-            console.log(
-              "[sendChat] updating existing streaming msg, tool_calls before:",
-              last.tool_calls?.length,
-            );
             last.content = r.response || __("(无响应)", "(no response)");
             last._grow = true;
             if (!last.reasoning_content) {
@@ -3627,21 +3641,24 @@ background:
             });
           }
           state.chatFinalIdx = state.messages.length - 1;
-          rerenderChat();
+          rerenderChat(true);
         } catch (e) {
-          state.messages.push({
-            role: "assistant",
-            content: __("错误: ", "Error: ") + e.message,
-            _final: true,
-          });
-          rerenderChat();
-          toast(__("请求失败: ", "Request failed: ") + e.message, true);
+          // 真实错误（非受理超时）：展示错误信息
+          if (!String(e.message || "").includes("aborted")) {
+            state.messages.push({
+              role: "assistant",
+              content: __("错误: ", "Error: ") + e.message,
+              _final: true,
+            });
+            rerenderChat(true);
+            toast(__("请求失败: ", "Request failed: ") + e.message, true);
+          }
         } finally {
           state.chatLoading = false;
           state.chatStage = "";
           btn.disabled = false;
           btn.textContent = __("发送", "Send");
-          rerenderChat();
+          rerenderChat(true);
         }
       }
 
@@ -4154,15 +4171,7 @@ background:
             console.error("[SSE] tool_call error", ex);
           }
         });
-        es.addEventListener("tool_result", function (e) {
-          try {
-            var ev = JSON.parse(e.data);
-            var p = ev.payload || {};
-            state.chatStage = __("工具结果已返回", "Tool result received");
-            var badge = document.getElementById("chat-stage");
-            if (badge) badge.textContent = state.chatStage;
-          } catch (ex) {}
-        });
+        // 注：后端不发布 tool_result 类型事件（工具结果随 EventToolCall 一次发出），无此监听器。
         es.addEventListener("stage", function (e) {
           try {
             var ev = JSON.parse(e.data);