diff --git a/components/canvas/nodes/ImageNode.tsx b/components/canvas/nodes/ImageNode.tsx
index c047b66..6033881 100644
--- a/components/canvas/nodes/ImageNode.tsx
+++ b/components/canvas/nodes/ImageNode.tsx
@@ -20,6 +20,7 @@ import {
 } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
+import { Tooltip, TooltipContent, TooltipTrigger, TooltipProvider } from "@/components/ui/tooltip";
 import { toast } from "sonner";
 import { useCanvasStore } from "@/store/canvas";
 import { imageGenerationService } from "@/services/canvas";
@@ -594,150 +595,178 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
       
       {/* 工具栏使用 Portal 渲染到 body，避免被裁剪 */}
       {isSelected && data.src && !isProcessing && 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: getToolbarPosition().top,
-            left: getToolbarPosition().left,
-            transform: 'translateX(-50%)',
-            pointerEvents: 'auto',
-          }}
-          onClick={(e) => e.stopPropagation()}
-        >
-          {/* 🆕 添加到对话 */}
-          <Button
-            variant="ghost"
-            size="sm"
-            className="h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-blue-50 text-blue-600 hover:text-blue-700"
-            onClick={() => {
-              addPendingChatAttachment({
-                url: data.src!,
-                name: data.prompt || '画布图片',
-                contentType: 'image/jpeg',
-              });
-              toast.success('已添加到对话框');
+        <TooltipProvider delayDuration={200}>
+          <div 
+            className="fixed flex items-center gap-0.5 bg-white border border-gray-200 rounded-full shadow-xl px-2 py-1 z-[9999]"
+            style={{ 
+              top: getToolbarPosition().top,
+              left: getToolbarPosition().left,
+              transform: 'translateX(-50%)',
+              pointerEvents: 'auto',
             }}
-            title="添加到对话框"
+            onClick={(e) => e.stopPropagation()}
           >
-            <MessageSquarePlus className="h-4 w-4" />
-            <span>对话</span>
-          </Button>
-          
-          {/* 分隔线 */}
-          <div className="h-5 w-px bg-gray-200 mx-1" />
-          
-          {/* 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>
-          
-          {/* 图片标注 */}
-          <Button
-            variant="ghost"
-            size="sm"
-            className={`h-9 px-3 text-xs gap-1.5 rounded-full hover:bg-gray-100 ${data.hasAnnotations ? 'text-primary' : ''}`}
-            onClick={() => handleAction('annotate')}
-            title="标注图片重点区域"
-          >
-            <Pencil className="h-4 w-4" />
-            <span>标注</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>,
+            {/* 添加到对话 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-blue-50 text-blue-600 hover:text-blue-700"
+                  onClick={() => {
+                    addPendingChatAttachment({
+                      url: data.src!,
+                      name: data.prompt || '画布图片',
+                      contentType: 'image/jpeg',
+                    });
+                    toast.success('已添加到对话框');
+                  }}
+                >
+                  <MessageSquarePlus className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">添加到对话</TooltipContent>
+            </Tooltip>
+            
+            {/* 分隔线 */}
+            <div className="h-5 w-px bg-gray-200 mx-0.5" />
+            
+            {/* 放大/高清 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-gray-100"
+                  onClick={() => handleAction('enhance')}
+                >
+                  <span className="text-[10px] font-medium text-gray-500 border border-gray-300 rounded px-1">HD</span>
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">高清放大</TooltipContent>
+            </Tooltip>
+            
+            {/* 移除背景/抠图 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-gray-100"
+                  onClick={() => handleAction('rmbg')}
+                >
+                  <Scissors className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">移除背景</TooltipContent>
+            </Tooltip>
+            
+            {/* 场景融合 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-gray-100"
+                  onClick={() => handleAction('scene-fusion')}
+                >
+                  <Layers className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">场景融合</TooltipContent>
+            </Tooltip>
+            
+            {/* 角度编辑 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-gray-100"
+                  onClick={() => handleAction('angle')}
+                >
+                  <Move3D className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">角度编辑</TooltipContent>
+            </Tooltip>
+            
+            {/* 扩展 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-gray-100"
+                  onClick={() => handleAction('extend')}
+                >
+                  <Expand className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">图片扩展</TooltipContent>
+            </Tooltip>
+            
+            {/* 尺寸调整 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-gray-100"
+                  onClick={() => handleAction('resize')}
+                >
+                  <Maximize2 className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">尺寸调整</TooltipContent>
+            </Tooltip>
+            
+            {/* 图片标注 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className={cn("h-8 w-8 rounded-full hover:bg-gray-100", data.hasAnnotations && "text-primary")}
+                  onClick={() => handleAction('annotate')}
+                >
+                  <Pencil className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">标注重点区域</TooltipContent>
+            </Tooltip>
+            
+            {/* 下载 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-gray-100"
+                  onClick={handleDownload}
+                >
+                  <Download className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">下载图片</TooltipContent>
+            </Tooltip>
+            
+            {/* 删除 */}
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  className="h-8 w-8 rounded-full hover:bg-red-50 text-red-500 hover:text-red-600"
+                  onClick={() => deleteNode(node.id)}
+                >
+                  <Trash2 className="h-4 w-4" />
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent side="bottom" className="text-xs">删除</TooltipContent>
+            </Tooltip>
+          </div>
+        </TooltipProvider>,
         document.body
       )}