diff --git a/web/app/dashboard/ai-workflows/_components/workflow-editor.tsx b/web/app/dashboard/ai-workflows/_components/workflow-editor.tsx
index f4c8d73..7d403ed 100644
--- a/web/app/dashboard/ai-workflows/_components/workflow-editor.tsx
+++ b/web/app/dashboard/ai-workflows/_components/workflow-editor.tsx
@@ -27,7 +27,6 @@ import {
   PanelLeftOpenIcon,
 } from "lucide-react"
 import { useCallback, useEffect, useMemo, useRef, useState } from "react"
-import type { PanelImperativeHandle } from "react-resizable-panels"
 
 import { Badge } from "@/components/ui/badge"
 import { Button } from "@/components/ui/button"
@@ -167,7 +166,6 @@ export function WorkflowEditor({
   const [selectedNodeId, setSelectedNodeId] = useState<string | null>(null)
   const [nodeLibraryCollapsed, setNodeLibraryCollapsed] = useState(false)
   const [pendingNodeDrag, setPendingNodeDrag] = useState<PendingNodeDrag | null>(null)
-  const nodeLibraryPanelRef = useRef<PanelImperativeHandle | null>(null)
   const canvasRef = useRef<HTMLElement | null>(null)
   const pendingNodeDragRef = useRef<PendingNodeDrag | null>(null)
   const suppressNextClickRef = useRef(false)
@@ -256,23 +254,6 @@ export function WorkflowEditor({
     })
   }
 
-  const toggleNodeLibrary = () => {
-    const panel = nodeLibraryPanelRef.current
-    if (!panel) {
-      setNodeLibraryCollapsed((current) => !current)
-      return
-    }
-
-    if (panel.isCollapsed()) {
-      panel.expand()
-      setNodeLibraryCollapsed(false)
-      return
-    }
-
-    panel.collapse()
-    setNodeLibraryCollapsed(true)
-  }
-
   const dropNodeOnCanvas = useCallback(
     (spec: AIWorkflowNodeSpec, x: number, y: number) => {
       if (!flowInstance || !canvasRef.current) {
@@ -357,70 +338,67 @@ export function WorkflowEditor({
 
   return (
     <ResizablePanelGroup orientation="horizontal" className="h-full min-h-0">
+      {!nodeLibraryCollapsed ? (
+        <>
+          <ResizablePanel defaultSize="18%" minSize="12%" maxSize="34%" className="min-h-0">
+            <aside className="h-full min-h-0 bg-muted/20">
+              <ScrollArea className="h-full min-h-0">
+                <div className="p-3">
+                  <div className="mb-3 flex items-center justify-between gap-2">
+                    <div className="min-w-0 truncate text-sm font-medium">节点库</div>
+                    <Button
+                      type="button"
+                      variant="ghost"
+                      size="icon"
+                      className="size-7 shrink-0 text-muted-foreground hover:text-foreground"
+                      onClick={() => setNodeLibraryCollapsed(true)}
+                      aria-label="折叠节点库"
+                    >
+                      <PanelLeftCloseIcon className="size-3.5" />
+                    </Button>
+                  </div>
+                  <div className="space-y-2">
+                    {nodeSpecs.map((spec) => (
+                      <button
+                        key={spec.type}
+                        type="button"
+                        onPointerDown={(event) => onNodePointerDown(event, spec)}
+                        onClick={() => {
+                          if (suppressNextClickRef.current) {
+                            suppressNextClickRef.current = false
+                            return
+                          }
+                          addNode(spec)
+                        }}
+                        className="flex w-full cursor-grab rounded-md border bg-background px-3 py-2 text-left text-sm hover:bg-muted active:cursor-grabbing"
+                      >
+                        <span className="min-w-0">
+                          <span className="block truncate font-medium">{spec.title}</span>
+                          <span className="mt-1 line-clamp-2 text-xs text-muted-foreground">
+                            {spec.description}
+                          </span>
+                          <span className="mt-1 flex gap-2 text-[11px] text-muted-foreground">
+                            <span>输入 {spec.inputSchema?.length ?? 0}</span>
+                            <span>输出 {spec.outputSchema?.length ?? 0}</span>
+                          </span>
+                        </span>
+                      </button>
+                    ))}
+                  </div>
+                </div>
+              </ScrollArea>
+            </aside>
+          </ResizablePanel>
+          <ResizableHandle withHandle />
+        </>
+      ) : null}
       <ResizablePanel
-        panelRef={nodeLibraryPanelRef}
-        defaultSize="18%"
-        minSize="12%"
-        maxSize="34%"
-        collapsedSize="0%"
-        collapsible
-        onResize={(panelSize: { asPercentage: number }) => {
-          setNodeLibraryCollapsed(panelSize.asPercentage <= 1)
-        }}
+        defaultSize={
+          nodeLibraryCollapsed ? (selectedNode ? "74%" : "100%") : selectedNode ? "56%" : "82%"
+        }
+        minSize="30%"
         className="min-h-0"
       >
-        {nodeLibraryCollapsed ? null : (
-          <aside className="h-full min-h-0 bg-muted/20">
-            <ScrollArea className="h-full min-h-0">
-              <div className="p-3">
-                <div className="mb-3 flex items-center justify-between gap-2">
-                  <div className="min-w-0 truncate text-sm font-medium">节点库</div>
-                  <Button
-                    type="button"
-                    variant="ghost"
-                    size="icon"
-                    className="size-7 shrink-0 text-muted-foreground hover:text-foreground"
-                    onClick={toggleNodeLibrary}
-                    aria-label="折叠节点库"
-                  >
-                    <PanelLeftCloseIcon className="size-3.5" />
-                  </Button>
-                </div>
-                <div className="space-y-2">
-                  {nodeSpecs.map((spec) => (
-                    <button
-                      key={spec.type}
-                      type="button"
-                      onPointerDown={(event) => onNodePointerDown(event, spec)}
-                      onClick={() => {
-                        if (suppressNextClickRef.current) {
-                          suppressNextClickRef.current = false
-                          return
-                        }
-                        addNode(spec)
-                      }}
-                      className="flex w-full cursor-grab rounded-md border bg-background px-3 py-2 text-left text-sm hover:bg-muted active:cursor-grabbing"
-                    >
-                      <span className="min-w-0">
-                        <span className="block truncate font-medium">{spec.title}</span>
-                        <span className="mt-1 line-clamp-2 text-xs text-muted-foreground">
-                          {spec.description}
-                        </span>
-                        <span className="mt-1 flex gap-2 text-[11px] text-muted-foreground">
-                          <span>输入 {spec.inputSchema?.length ?? 0}</span>
-                          <span>输出 {spec.outputSchema?.length ?? 0}</span>
-                        </span>
-                      </span>
-                    </button>
-                  ))}
-                </div>
-              </div>
-            </ScrollArea>
-          </aside>
-        )}
-      </ResizablePanel>
-      <ResizableHandle withHandle />
-      <ResizablePanel defaultSize={selectedNode ? "56%" : "82%"} minSize="30%" className="min-h-0">
         <section
           data-workflow-canvas
           ref={canvasRef}
@@ -435,7 +413,7 @@ export function WorkflowEditor({
               variant="outline"
               size="icon"
               className="absolute top-12 left-3 z-20 size-7 rounded-full bg-background/95 text-muted-foreground shadow-sm hover:text-foreground"
-              onClick={toggleNodeLibrary}
+              onClick={() => setNodeLibraryCollapsed(false)}
               aria-label="展开节点库"
             >
               <PanelLeftOpenIcon className="size-3.5" />