fix: 切换画布时清空状态并重新加载数据

app/canvas/[id]/page.tsx

@@ -105,6 +105,7 @@ export default function CanvasEditorPage({ params }: PageProps) {
   const undo = useCanvasStore((state) => state.undo);
   const redo = useCanvasStore((state) => state.redo);
   const loadCanvas = useCanvasStore((state) => state.loadCanvas);
+  const clearCanvas = useCanvasStore((state) => state.clearCanvas);
   const getCanvasState = useCanvasStore((state) => state.getCanvasState);
   const addNode = useCanvasStore((state) => state.addNode);
   const updateNode = useCanvasStore((state) => state.updateNode);
@@ -134,6 +135,10 @@ export default function CanvasEditorPage({ params }: PageProps) {
   useEffect(() => {
     const loadProject = async () => {
       setIsLoading(true);
+      
+      // 🆕 先清空当前画布状态，确保切换时不会显示旧数据
+      clearCanvas();
+      
       const result = await canvasService.getProject(id);
       
       if (result.success && result.data) {
@@ -156,7 +161,7 @@ export default function CanvasEditorPage({ params }: PageProps) {
     };
     
     loadProject();
-  }, [id]);
+  }, [id, clearCanvas, setProject, loadCanvas]);
 
   // 自动保存逻辑
   useEffect(() => {

components/canvas/CanvasFileListPanel.tsx

@@ -52,7 +52,9 @@ export function CanvasFileListPanel({ currentId, onClose }: CanvasFileListPanelP
       onClose();
       return;
     }
+    // 使用 router.push 并关闭面板，让页面组件的 useEffect 处理加载
     router.push(`/canvas/${id}`);
+    onClose(); // 关闭文件列表面板，切换到聊天面板
   };
 
   // 删除画布