feat(canvas): 添加图像节点预览功能

- 在CanvasNode组件中添加onViewImage回调属性
- 实现图像节点点击时触发预览功能
- 修复事件冒泡问题，确保图像预览操作不会触发其他交互

web/src/app/(user)/canvas/[id]/canvas-client-page.tsx

@@ -2339,6 +2339,7 @@ function InfiniteCanvasPage() {
                             onSetBatchPrimary={setBatchPrimary}
                             onRetry={(node) => void handleRetryNode(node)}
                             onGenerateImage={generateImageFromTextNode}
+                            onViewImage={(node) => setPreviewNodeId(node.id)}
                             onContextMenu={(event, id) => {
                                 event.preventDefault();
                                 event.stopPropagation();

web/src/app/(user)/canvas/components/canvas-node.tsx

@@ -45,6 +45,7 @@ type CanvasNodeProps = {
     onSetBatchPrimary?: (node: CanvasNodeData) => void;
     onRetry?: (node: CanvasNodeData) => void;
     onGenerateImage?: (node: CanvasNodeData) => void;
+    onViewImage?: (node: CanvasNodeData) => void;
     onContextMenu: (event: React.MouseEvent, nodeId: string) => void;
 };
 
@@ -99,6 +100,7 @@ export const CanvasNode = React.memo(function CanvasNode({
     onSetBatchPrimary,
     onRetry,
     onGenerateImage,
+    onViewImage,
     onContextMenu,
 }: CanvasNodeProps) {
     const theme = canvasThemes[useThemeStore((state) => state.theme)];
@@ -269,6 +271,11 @@ export const CanvasNode = React.memo(function CanvasNode({
                         onToggleBatch?.(data.id);
                         return;
                     }
+                    if (data.type === CanvasNodeType.Image && hasImageContent) {
+                        event.stopPropagation();
+                        onViewImage?.(data);
+                        return;
+                    }
                     if (data.type !== CanvasNodeType.Text) return;
                     event.stopPropagation();
                     setIsEditingContent(true);