diff --git a/src/components/AiChat.vue b/src/components/AiChat.vue
index 45f52c9..1954d4c 100644
--- a/src/components/AiChat.vue
+++ b/src/components/AiChat.vue
@@ -746,6 +746,10 @@ watch(() => store.state.streaming, (s) => {
 })
 onBeforeUnmount(() => {
   if (rafId !== null) cancelAnimationFrame(rafId)
+  // CR-260615-24: 释放后端 listener(ai-chat-event/ai-conversation-changed)+清流式看门狗。
+  // 之前 stopListener 定义但全仓零调用 → listener+watchdog 永久泄漏;分离窗口主窗口 AiChat
+  // 卸载(走 App.vue v-if detach)时 listener 仍挂后端,watchdog 130s 后写已卸载 state。
+  store.stopListener()
 })
 
 // ── 工具卡片自动收起:新内容追加(新消息/toolCall 状态变化/文本增长)时,
diff --git a/src/composables/ai/useAiEvents.ts b/src/composables/ai/useAiEvents.ts
index 753eec4..88abe9c 100644
--- a/src/composables/ai/useAiEvents.ts
+++ b/src/composables/ai/useAiEvents.ts
@@ -254,12 +254,15 @@ export async function startListener() {
   }
 }
 
-/** 停止事件监听(卸载时调用,释放后端 listener) */
+/** 停止事件监听(卸载时调用,释放后端 listener + 清看门狗)
+ *  清看门狗:卸载时若仍在生成,_streamWatchdog 计时器未释放,130s 后 onStreamTimeout
+ *  仍写 state(messages.push/置 streaming)——已卸载组件不应再被触发。故同步清除。 */
 function stopListener() {
   _unlistenAiEvent?.()
   _unlistenConvChanged?.()
   _unlistenAiEvent = null
   _unlistenConvChanged = null
+  clearStreamWatchdog()
 }
 
 export function useAiEvents() {