速度优化

frontend-web/src/components/workspace/artifacts/context.tsx

@@ -32,7 +32,10 @@ interface ArtifactsProviderProps {
 }
 
 export function ArtifactsProvider({ children }: ArtifactsProviderProps) {
-  const [artifacts, setArtifacts] = useState<string[]>([]);
+  const [artifacts, setArtifactsState] = useState<string[]>([]);
+  const setArtifacts = useCallback((next: string[]) => {
+    setArtifactsState(Array.isArray(next) ? next : []);
+  }, []);
   const [selectedArtifact, setSelectedArtifact] = useState<string | null>(null);
   const [autoSelect, setAutoSelect] = useState(true);
   const [open, setOpen] = useState(

frontend-web/src/roundtable-planning/components/Step2SandboxLayout.tsx

@@ -50,11 +50,12 @@ export function Step2SandboxLayout({
 }: Step2SandboxLayoutProps) {
   const layoutRef = useRef<GroupImperativeHandle>(null);
   const {
-    artifacts,
+    artifacts: rawArtifacts,
     open: artifactsOpen,
     setOpen: setArtifactsOpen,
     selectedArtifact,
   } = useArtifacts();
+  const artifacts = rawArtifacts ?? [];
 
   const artifactPanelOpen = artifactsOpen;
 

frontend-web/src/roundtable-planning/hooks/useStep2Orchestration.ts

@@ -234,7 +234,7 @@ export function useStep2Orchestration(
   } = useArtifacts();
   const artifactPathsRef = useRef<string[]>([]);
   useEffect(() => {
-    artifactPathsRef.current = artifacts;
+    artifactPathsRef.current = artifacts ?? [];
   }, [artifacts]);
   // 用户手动关掉沙箱后,autoOpen 会被 ArtifactsProvider 置 false —— 把它们打到 ref
   // 上,让 openSeatVirtualArtifact 不用进 useCallback deps,避免每次 toggle 重建函数。