fix: 使用 Portal 渲染工具栏避免被裁剪

1. 工具栏使用 createPortal 渲染到 body 级别
2. 根据图片位置动态计算工具栏定位
3. z-index 设为 9999 确保最顶层显示

Co-authored-by: Cursor <cursoragent@cursor.com>

components/canvas/nodes/ImageNode.tsx

@@ -1,6 +1,7 @@
 "use client";
 
-import React, { useState, useRef } from "react";
+import React, { useState, useRef, useEffect } from "react";
+import { createPortal } from "react-dom";
 import { ImagePlus, Loader2, AlertCircle, MoreVertical, Scissors, Sparkles, Expand, Maximize2, Move3D, Layers, Download, Trash2, RefreshCw } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import {
@@ -42,13 +43,28 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
   const [resizeWidth, setResizeWidth] = useState(1024);
   const [resizeHeight, setResizeHeight] = useState(1024);
   const [isUploading, setIsUploading] = useState(false);
+  const [toolbarPosition, setToolbarPosition] = useState<{ top: number; left: number } | null>(null);
   
   // 文件输入的 ref
   const fileInputRef = useRef<HTMLInputElement>(null);
+  const containerRef = useRef<HTMLDivElement>(null);
   
   const updateNode = useCanvasStore((state) => state.updateNode);
   const deleteNode = useCanvasStore((state) => state.deleteNode);
   const addNode = useCanvasStore((state) => state.addNode);
+  
+  // 计算工具栏位置
+  useEffect(() => {
+    if (isSelected && containerRef.current) {
+      const rect = containerRef.current.getBoundingClientRect();
+      setToolbarPosition({
+        top: rect.top - 50, // 工具栏在图片上方 50px
+        left: rect.left + rect.width / 2, // 居中
+      });
+    } else {
+      setToolbarPosition(null);
+    }
+  }, [isSelected, node.position, node.size]);
 
   // 触发文件选择
   const handleSelectFile = (e: React.MouseEvent) => {
@@ -324,7 +340,7 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
     <>
       {/* 选中时在图片上方显示标题和尺寸 */}
       {isSelected && data.src && (
-        <div className="absolute -top-7 left-0 right-0 flex items-center justify-between text-xs text-muted-foreground px-1">
+        <div className="absolute -top-7 left-0 right-0 flex items-center justify-between text-xs text-muted-foreground px-1 z-10">
           <div className="flex items-center gap-1">
             <ImagePlus className="h-3 w-3" />
             <span className="truncate max-w-[150px]">{data.prompt || '图片'}</span>
@@ -334,6 +350,7 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
       )}
       
       <div
+        ref={containerRef}
         className={cn(
           "relative w-full h-full bg-card rounded-lg overflow-hidden border-2 shadow-sm transition-colors",
           isSelected ? "border-primary" : "border-transparent"
@@ -392,117 +409,7 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
           </div>
         )}
 
-        {/* 选中时显示的顶部工具栏 - 显示在图片外部上方 */}
-        {isSelected && data.src && !isProcessing && (
-          <div 
-            className="absolute -top-12 left-1/2 -translate-x-1/2 flex items-center gap-0.5 bg-white border border-gray-200 rounded-full shadow-xl px-3 py-1.5 z-[100]"
-            style={{ 
-              pointerEvents: 'auto',
-              minWidth: 'max-content',
-            }}
-            onClick={(e) => e.stopPropagation()}
-          >
-            {/* 放大/高清 */}
-            <Button
-              variant="ghost"
-              size="sm"
-              className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
-              onClick={() => handleAction('enhance')}
-              title="高清放大"
-            >
-              <span className="text-[10px] font-medium text-gray-500 border border-gray-300 rounded px-1">HD</span>
-              <span>放大</span>
-            </Button>
-            
-            {/* 移除背景/抠图 */}
-            <Button
-              variant="ghost"
-              size="sm"
-              className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
-              onClick={() => handleAction('rmbg')}
-              title="移除背景"
-            >
-              <Scissors className="h-4 w-4" />
-              <span>移除背景</span>
-            </Button>
-            
-            {/* 场景融合 */}
-            <Button
-              variant="ghost"
-              size="sm"
-              className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
-              onClick={() => handleAction('scene-fusion')}
-              title="场景融合"
-            >
-              <Layers className="h-4 w-4" />
-              <span>场景</span>
-            </Button>
-            
-            {/* 角度编辑 */}
-            <Button
-              variant="ghost"
-              size="sm"
-              className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
-              onClick={() => handleAction('angle')}
-              title="角度编辑"
-            >
-              <Move3D className="h-4 w-4" />
-              <span>角度</span>
-            </Button>
-            
-            {/* 扩展 */}
-            <Button
-              variant="ghost"
-              size="sm"
-              className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
-              onClick={() => handleAction('extend')}
-              title="图片扩展"
-            >
-              <Expand className="h-4 w-4" />
-              <span>扩展</span>
-            </Button>
-            
-            {/* 尺寸调整 */}
-            <Button
-              variant="ghost"
-              size="sm"
-              className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
-              onClick={() => handleAction('resize')}
-              title="尺寸调整"
-            >
-              <Maximize2 className="h-4 w-4" />
-              <span>调整</span>
-            </Button>
-            
-            {/* 更多操作 */}
-            <DropdownMenu>
-              <DropdownMenuTrigger asChild>
-                <Button
-                  variant="ghost"
-                  size="sm"
-                  className="h-9 px-2 rounded-full hover:bg-gray-100"
-                  title="更多"
-                >
-                  <MoreVertical className="h-4 w-4" />
-                </Button>
-              </DropdownMenuTrigger>
-              <DropdownMenuContent align="end">
-                <DropdownMenuItem onClick={handleDownload}>
-                  <Download className="h-4 w-4 mr-2" />
-                  下载图片
-                </DropdownMenuItem>
-                <DropdownMenuSeparator />
-                <DropdownMenuItem 
-                  onClick={() => deleteNode(node.id)}
-                  className="text-destructive focus:text-destructive"
-                >
-                  <Trash2 className="h-4 w-4 mr-2" />
-                  删除
-                </DropdownMenuItem>
-              </DropdownMenuContent>
-            </DropdownMenu>
-          </div>
-        )}
+        {/* 工具栏使用 Portal 渲染到 body，避免被裁剪 */}
 
         {/* 悬浮时的更多操作按钮 (右上角) */}
         {isHovered && data.src && !isProcessing && !isSelected && (
@@ -627,6 +534,121 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
           </DialogFooter>
         </DialogContent>
       </Dialog>
+      
+      {/* 工具栏使用 Portal 渲染到 body，避免被裁剪 */}
+      {isSelected && data.src && !isProcessing && toolbarPosition && typeof document !== 'undefined' && createPortal(
+        <div 
+          className="fixed flex items-center gap-0.5 bg-white border border-gray-200 rounded-full shadow-xl px-3 py-1.5 z-[9999]"
+          style={{ 
+            top: toolbarPosition.top,
+            left: toolbarPosition.left,
+            transform: 'translateX(-50%)',
+            pointerEvents: 'auto',
+          }}
+          onClick={(e) => e.stopPropagation()}
+        >
+          {/* 放大/高清 */}
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
+            onClick={() => handleAction('enhance')}
+            title="高清放大"
+          >
+            <span className="text-[10px] font-medium text-gray-500 border border-gray-300 rounded px-1">HD</span>
+            <span>放大</span>
+          </Button>
+          
+          {/* 移除背景/抠图 */}
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
+            onClick={() => handleAction('rmbg')}
+            title="移除背景"
+          >
+            <Scissors className="h-4 w-4" />
+            <span>移除背景</span>
+          </Button>
+          
+          {/* 场景融合 */}
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
+            onClick={() => handleAction('scene-fusion')}
+            title="场景融合"
+          >
+            <Layers className="h-4 w-4" />
+            <span>场景</span>
+          </Button>
+          
+          {/* 角度编辑 */}
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
+            onClick={() => handleAction('angle')}
+            title="角度编辑"
+          >
+            <Move3D className="h-4 w-4" />
+            <span>角度</span>
+          </Button>
+          
+          {/* 扩展 */}
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
+            onClick={() => handleAction('extend')}
+            title="图片扩展"
+          >
+            <Expand className="h-4 w-4" />
+            <span>扩展</span>
+          </Button>
+          
+          {/* 尺寸调整 */}
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100"
+            onClick={() => handleAction('resize')}
+            title="尺寸调整"
+          >
+            <Maximize2 className="h-4 w-4" />
+            <span>调整</span>
+          </Button>
+          
+          {/* 更多操作 */}
+          <DropdownMenu>
+            <DropdownMenuTrigger asChild>
+              <Button
+                variant="ghost"
+                size="sm"
+                className="h-9 px-2 rounded-full hover:bg-gray-100"
+                title="更多"
+              >
+                <MoreVertical className="h-4 w-4" />
+              </Button>
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="end">
+              <DropdownMenuItem onClick={handleDownload}>
+                <Download className="h-4 w-4 mr-2" />
+                下载图片
+              </DropdownMenuItem>
+              <DropdownMenuSeparator />
+              <DropdownMenuItem 
+                onClick={() => deleteNode(node.id)}
+                className="text-destructive focus:text-destructive"
+              >
+                <Trash2 className="h-4 w-4 mr-2" />
+                删除
+              </DropdownMenuItem>
+            </DropdownMenuContent>
+          </DropdownMenu>
+        </div>,
+        document.body
+      )}
     </>
   );
 }