feat(image): integrate PoloX image editing workflows

Add WaveSpeed image editing and image tools plugins, canvas image editing workflows, layer selection, and Cloud Agent image tools with approval-safe transient references.

web/src/components/canvas/canvas-toolbar.tsx

@@ -162,7 +162,7 @@ export function CanvasToolbar({
         onAlign: () => {}, onArrange: () => {}, onCreateStoryboard: () => {}, onCreateReferenceGroup: () => {}, onBatchConnect: () => {}, onMergeVideos: () => {}, onSendSelectionToAgent: () => {},
         onNodeInfo: () => {}, onNodeDelete: () => {}, onNodeRetry: () => {}, onNodeEditText: () => {}, onNodeDecreaseFont: () => {}, onNodeIncreaseFont: () => {},
         onNodeToggleDialog: () => {}, onNodeAnnotate: () => {}, onNodeGenerateImage: () => {}, onNodeUpload: () => {}, onNodeDownload: () => {}, onNodeSaveAsset: () => {},
-        onNodeMaskEdit: () => {}, onNodeEmotion: () => {}, onNodePortraitTexture: () => {}, onNodeCrop: () => {}, onNodeSplit: () => {}, onNodeUpscale: () => {},
+        onNodeMaskEdit: () => {}, onNodeImageEdit: () => {}, onNodeRemoveBackground: () => {}, onNodeEmotion: () => {}, onNodePortraitTexture: () => {}, onNodeCrop: () => {}, onNodeSplit: () => {}, onNodeUpscale: () => {},
         onNodeSuperResolve: () => {}, onNodeAngle: () => {}, onNodeViewImage: () => {}, onNodeExtractVideoFrames: () => {}, onNodeExtractAudioFromVideo: () => {}, onNodeTrimVideoSegments: () => {}, onNodeSubtitles: () => {}, onNodeTimeline: () => {}, onNodeReversePrompt: () => {},
         onNodeToggleFreeResize: () => {}, onNodeToggleLocked: () => {}, onNodeCopyPrompt: () => {},
     } as ToolbarHandlers;