Merge pull request '保留画布后台查询期间的本地编辑' (#44) from codex/canvas-refresh-snapshot-20261105 into main

app/canvas/[id]/CanvasEditorLegacyPageClient.tsx

@@ -5196,6 +5196,7 @@ export default function CanvasEditorLegacyPage({
       }
 
       try {
+        const beforeRead = useCanvasStore.getState();
         const revisionResponse = await fetch(`/api/canvas/${id}/revision`, {
           cache: "no-store",
         });
@@ -5215,7 +5216,6 @@ export default function CanvasEditorLegacyPage({
           return;
         }
 
-        const beforeRead = useCanvasStore.getState();
         const result = await canvasService.getProject(id);
         const current = useCanvasStore.getState();
         if (