feat: show processing state for image operations in canvas

- Add toolbar above selected image for quick access to editing tools
- Create new node with 'generating' status before processing
- Update node status to 'completed' or 'failed' after processing
- Allow overflow visible for toolbar to display outside node bounds

components/canvas/CanvasWorkspace.tsx

@@ -182,6 +182,7 @@ export function CanvasWorkspace() {
           "absolute",
           isSelected && "ring-2 ring-primary ring-offset-2"
         )}
+        style={{ overflow: 'visible' }} // 允许工具栏显示在节点外部
         onClick={(e: React.MouseEvent) => {
           e.stopPropagation();
           selectNode(node.id, e.shiftKey);
@@ -191,6 +192,7 @@ export function CanvasWorkspace() {
           initial={{ opacity: 0, scale: 0.9 }}
           animate={{ opacity: 1, scale: 1 }}
           className="w-full h-full"
+          style={{ overflow: 'visible' }} // 允许工具栏显示在节点外部
         >
           {node.type === 'image' && (
             <ImageNode node={node} isSelected={isSelected} />

components/canvas/nodes/ImageNode.tsx

@@ -101,6 +101,19 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
     e.target.value = '';
   };
 
+  // 获取操作的中文名称
+  const getActionName = (action: string): string => {
+    const names: Record<string, string> = {
+      'rmbg': '抠图',
+      'enhance': '变清晰',
+      'extend': '图片扩展',
+      'resize': '尺寸调整',
+      'angle': '角度编辑',
+      'scene-fusion': '场景裂变',
+    };
+    return names[action] || action;
+  };
+
   // 处理图片编辑操作 - 集成我们现有的 API
   const handleAction = async (action: string) => {
     if (!data.src) {
@@ -122,7 +135,25 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
       return;
     }
 
-    setIsProcessing(true);
+    const actionName = getActionName(action);
+
+    // 先创建一个"处理中"状态的节点，显示在原图右侧
+    const newNodeId = addNode({
+      type: 'image',
+      position: { 
+        x: node.position.x + node.size.width + 20, 
+        y: node.position.y 
+      },
+      size: { width: node.size.width, height: node.size.height },
+      data: { 
+        src: '', // 暂时没有图片
+        status: 'generating',
+        prompt: `${actionName}处理中...`,
+        originalSrc: data.src,
+      },
+      connections: [node.id],
+    });
+
     let result;
 
     try {
@@ -137,37 +168,52 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
           result = await imageGenerationService.extendImage(data.src);
           break;
         default:
-          setIsProcessing(false);
+          // 删除创建的节点
+          if (newNodeId) deleteNode(newNodeId);
           return;
       }
 
       if (result?.success && result.data?.url) {
-        // 创建新的图片节点显示处理结果
+        // 更新节点为完成状态
-        addNode({
+        if (newNodeId) {
-          type: 'image',
+          updateNode(newNodeId, {
-          position: { 
+            data: { 
-            x: node.position.x + node.size.width + 20, 
+              src: result.data.url, 
-            y: node.position.y 
+              status: 'completed',
-          },
+              prompt: `${actionName}结果`,
-          size: { width: node.size.width, height: node.size.height },
+              originalSrc: data.src,
-          data: { 
+            },
-            src: result.data.url, 
+          });
-            status: 'completed',
+        }
-            prompt: `${action} 处理结果`,
+        toast.success(`${actionName}处理完成`);
-            originalSrc: data.src,
-          },
-          connections: [node.id],
-        });
-        
-        toast.success(`${action} 处理完成`);
       } else {
+        // 更新节点为失败状态
+        if (newNodeId) {
+          updateNode(newNodeId, {
+            data: { 
+              src: '', 
+              status: 'failed',
+              prompt: `${actionName}失败`,
+              originalSrc: data.src,
+            },
+          });
+        }
         toast.error(result?.error || "处理失败");
       }
     } catch (error) {
       console.error(`${action} 处理失败:`, error);
+      // 更新节点为失败状态
+      if (newNodeId) {
+        updateNode(newNodeId, {
+          data: { 
+            src: '', 
+            status: 'failed',
+            prompt: `${actionName}失败`,
+            originalSrc: data.src,
+          },
+        });
+      }
       toast.error("处理失败，请重试");
-    } finally {
-      setIsProcessing(false);
     }
   };
 
@@ -262,8 +308,96 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
           </div>
         )}
 
-        {/* 悬浮操作栏 */}
+        {/* 选中时显示的顶部工具栏 - 和聊天窗口中的功能一致 */}
-        {isHovered && data.src && !isProcessing && (
+        {isSelected && data.src && !isProcessing && (
+          <div 
+            className="absolute -top-12 left-1/2 -translate-x-1/2 flex items-center gap-1 bg-background/95 backdrop-blur-sm border rounded-lg shadow-lg p-1.5 z-10"
+            onClick={(e) => e.stopPropagation()}
+          >
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1"
+              onClick={() => handleAction('rmbg')}
+              title="抠图"
+            >
+              <Scissors className="h-3.5 w-3.5" />
+              <span className="hidden sm:inline">抠图</span>
+            </Button>
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1"
+              onClick={() => handleAction('enhance')}
+              title="变清晰"
+            >
+              <Sparkles className="h-3.5 w-3.5" />
+              <span className="hidden sm:inline">变清晰</span>
+            </Button>
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1"
+              onClick={() => handleAction('extend')}
+              title="扩展"
+            >
+              <Expand className="h-3.5 w-3.5" />
+              <span className="hidden sm:inline">扩展</span>
+            </Button>
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1"
+              onClick={() => handleAction('resize')}
+              title="调整"
+            >
+              <Maximize2 className="h-3.5 w-3.5" />
+              <span className="hidden sm:inline">调整</span>
+            </Button>
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1"
+              onClick={() => handleAction('angle')}
+              title="角度"
+            >
+              <Move3D className="h-3.5 w-3.5" />
+              <span className="hidden sm:inline">角度</span>
+            </Button>
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1"
+              onClick={() => handleAction('scene-fusion')}
+              title="场景"
+            >
+              <Layers className="h-3.5 w-3.5" />
+              <span className="hidden sm:inline">场景</span>
+            </Button>
+            <div className="w-px h-5 bg-border mx-0.5" />
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1"
+              onClick={handleDownload}
+              title="下载"
+            >
+              <Download className="h-3.5 w-3.5" />
+            </Button>
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-8 px-2 text-xs gap-1 text-destructive hover:text-destructive"
+              onClick={() => deleteNode(node.id)}
+              title="删除"
+            >
+              <Trash2 className="h-3.5 w-3.5" />
+            </Button>
+          </div>
+        )}
+
+        {/* 悬浮时的更多操作按钮 (右上角) */}
+        {isHovered && data.src && !isProcessing && !isSelected && (
           <div className="absolute top-2 right-2 flex items-center gap-1">
             <DropdownMenu>
               <DropdownMenuTrigger asChild>