frontend/app/features/platform/ModelPlatformApp.tsx

@@ -184,6 +184,15 @@ function AuthenticatedModelPlatformApp() {
         selectedIdRef.current = nextSelectedId;
         return nextSelectedId;
       });
+      // 同时更新打开的标签页
+      setOpenTabIds((current) => {
+        const firstNotebook = items.find((item) => item.script_type === "notebook")?.script_id
+          ?? items[0]?.script_id;
+        if (!firstNotebook) return [];
+        // 如果当前标签页已经包含，则保持不变
+        if (current.includes(firstNotebook)) return current;
+        return [firstNotebook];
+      });
     } catch (error) {
       setApiOnline(false);
       setToast({
@@ -200,6 +209,20 @@ function AuthenticatedModelPlatformApp() {
     void load();
   }, []);
 
+  // 切换 Workspace 时重置状态并重新加载
+  useEffect(() => {
+    setScripts([]);
+    setDirectories([]);
+    setSelectedId(null);
+    setOpenTabIds([]);
+    setLatestVersion(null);
+    setEmbeddedJupyterUrl(null);
+    setEditSession(null);
+    editSessionRef.current = null;
+    selectedIdRef.current = null;
+    void load();
+  }, [currentWorkspace.workspace_id]);
+
   useEffect(() => {
     if (!toast) return;
     const timer = window.setTimeout(() => setToast(null), 3200);