From 8613e9187842149fd4abc22bbb8b9577e54474db Mon Sep 17 00:00:00 2001
From: m4air <m4air@Mac.localdomain>
Date: Tue, 15 Sep 2026 16:20:31 -0700
Subject: [PATCH] fix(renderer): cancel deferred diff model disposal

---
 .../editor/use-diff-section-model-lifecycle.ts   | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/renderer/src/components/editor/use-diff-section-model-lifecycle.ts b/src/renderer/src/components/editor/use-diff-section-model-lifecycle.ts
index 5d8c901c367..61bee09f89c 100644
--- a/src/renderer/src/components/editor/use-diff-section-model-lifecycle.ts
+++ b/src/renderer/src/components/editor/use-diff-section-model-lifecycle.ts
@@ -12,13 +12,18 @@ export function useDiffSectionModelLifecycle(params: {
   setSectionRootNode: (node: HTMLDivElement | null) => void
 } {
   const disposeDiffModels = useCallback(() => {
-    window.setTimeout(() => {
+    if (disposeTimerRef.current !== null) {
+      window.clearTimeout(disposeTimerRef.current)
+    }
+    disposeTimerRef.current = window.setTimeout(() => {
+      disposeTimerRef.current = null
       disposeUnattachedMonacoModelPaths(monaco, [
         `${params.modelPathBase}:original`,
         `${params.modelPathBase}:modified`
       ])
     }, 0)
   }, [params.modelPathBase])
+  const disposeTimerRef = useRef<number | null>(null)
   const disposeDiffModelsRef = useRef(disposeDiffModels)
   // Keep callback-ref dispose path on the latest disposer without render-time mutation.
   useEffect(() => {
@@ -38,5 +43,14 @@ export function useDiffSectionModelLifecycle(params: {
     }
   }, [disposeDiffModels, params.collapsed])
 
+  useEffect(() => {
+    return () => {
+      if (disposeTimerRef.current !== null) {
+        window.clearTimeout(disposeTimerRef.current)
+        disposeTimerRef.current = null
+      }
+    }
+  }, [])
+
   return { disposeDiffModels, setSectionRootNode }
 }