fix(canvas): restore compare drag and ctrl+a image multi-select

app/canvas/[id]/page.tsx

@@ -112,6 +112,7 @@ export default function CanvasEditorPage({ params }: PageProps) {
   const clearCanvas = useCanvasStore((state) => state.clearCanvas);
   const getCanvasState = useCanvasStore((state) => state.getCanvasState);
   const addNode = useCanvasStore((state) => state.addNode);
+  const selectNodes = useCanvasStore((state) => state.selectNodes);
   const updateNode = useCanvasStore((state) => state.updateNode);
   const setGenerating = useCanvasStore((state) => state.setGenerating);
   
@@ -487,6 +488,22 @@ export default function CanvasEditorPage({ params }: PageProps) {
         e.preventDefault();
         handleSave();
       }
+      // Ctrl/Cmd + A：当已选中图片时，选中画布内全部图片
+      if ((e.ctrlKey || e.metaKey) && e.key.toLowerCase() === 'a') {
+        const { nodes: currentNodes, selectedNodeIds: currentSelectedNodeIds } = useCanvasStore.getState();
+        const selectedHasImage = currentSelectedNodeIds.some((selectedId) =>
+          currentNodes.some((node) => node.id === selectedId && node.type === "image")
+        );
+        if (selectedHasImage) {
+          const allImageNodeIds = currentNodes
+            .filter((node) => node.type === "image" && Boolean((node.data as any)?.src))
+            .map((node) => node.id);
+          if (allImageNodeIds.length > 0) {
+            e.preventDefault();
+            selectNodes(allImageNodeIds);
+          }
+        }
+      }
       // Ctrl/Cmd + Z 撤销
       if ((e.ctrlKey || e.metaKey) && e.key === 'z' && !e.shiftKey) {
         e.preventDefault();
@@ -513,7 +530,7 @@ export default function CanvasEditorPage({ params }: PageProps) {
 
     window.addEventListener('keydown', handleKeyDown);
     return () => window.removeEventListener('keydown', handleKeyDown);
-  }, [handleSave, undo, redo, setTool]);
+  }, [handleSave, nodes, redo, selectNodes, selectedNodeIds, setTool, undo]);
 
   if (isLoading) {
     return (

components/canvas/nodes/ImageNode.tsx

@@ -264,7 +264,6 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
   // 文件输入的 ref
   const fileInputRef = useRef<HTMLInputElement>(null);
   const containerRef = useRef<HTMLDivElement>(null);
-  const compareFrameRef = useRef<HTMLDivElement>(null);
   
   const updateNode = useCanvasStore((state) => state.updateNode);
   const deleteNode = useCanvasStore((state) => state.deleteNode);
@@ -338,44 +337,6 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
     }
   }, [hasCompareSource, isThisNodePicking]);
 
-  const updateCompareSplitByClientX = useCallback((clientX: number) => {
-    const frame = compareFrameRef.current;
-    if (!frame) return;
-
-    const rect = frame.getBoundingClientRect();
-    if (rect.width <= 0) return;
-
-    const rawPercent = ((clientX - rect.left) / rect.width) * 100;
-    const clampedPercent = Math.max(0, Math.min(100, rawPercent));
-    setCompareSplitPercent(clampedPercent);
-  }, []);
-
-  const startCompareDrag = useCallback((clientX: number) => {
-    setIsCompareDragging(true);
-    updateCompareSplitByClientX(clientX);
-  }, [updateCompareSplitByClientX]);
-
-  useEffect(() => {
-    if (!isCompareDragging) return;
-
-    const handlePointerMove = (event: PointerEvent) => {
-      updateCompareSplitByClientX(event.clientX);
-    };
-    const handlePointerEnd = () => {
-      setIsCompareDragging(false);
-    };
-
-    window.addEventListener("pointermove", handlePointerMove);
-    window.addEventListener("pointerup", handlePointerEnd);
-    window.addEventListener("pointercancel", handlePointerEnd);
-
-    return () => {
-      window.removeEventListener("pointermove", handlePointerMove);
-      window.removeEventListener("pointerup", handlePointerEnd);
-      window.removeEventListener("pointercancel", handlePointerEnd);
-    };
-  }, [isCompareDragging, updateCompareSplitByClientX]);
-
   useEffect(() => {
     if (!isEditingTitle) {
       setDraftTitle(getImageNodeTitle(data, node.id));
@@ -1561,35 +1522,12 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
           <div className="relative w-full h-full">
             {isCompareMode && hasCompareSource ? (
               <div
-                ref={compareFrameRef}
                 className={cn(
                   "relative h-full w-full overflow-hidden bg-muted/30 select-none",
                   isCompareDragging ? "cursor-col-resize" : "cursor-default"
                 )}
                 style={{ touchAction: "none" }}
                 data-canvas-no-drag="true"
-                onPointerDown={(event) => {
-                  if (event.button !== 0) return;
-                  event.preventDefault();
-                  event.stopPropagation();
-                  event.currentTarget.setPointerCapture(event.pointerId);
-                  startCompareDrag(event.clientX);
-                }}
-                onPointerMove={(event) => {
-                  if (!isCompareDragging) return;
-                  event.preventDefault();
-                  event.stopPropagation();
-                  updateCompareSplitByClientX(event.clientX);
-                }}
-                onPointerUp={(event) => {
-                  if (!isCompareDragging) return;
-                  event.preventDefault();
-                  event.stopPropagation();
-                  setIsCompareDragging(false);
-                }}
-                onPointerCancel={() => {
-                  setIsCompareDragging(false);
-                }}
               >
                 <img
                   src={compareSource}
@@ -1617,19 +1555,50 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
                 <button
                   type="button"
                   className="absolute top-1/2 z-40 h-7 w-7 -translate-x-1/2 -translate-y-1/2 cursor-col-resize rounded-full border border-white/85 bg-black/70 text-white"
-                  style={{ left: `${compareSplitPercent}%`, touchAction: "none" }}
+                  style={{ left: `${compareSplitPercent}%` }}
                   data-canvas-no-drag="true"
-                  onPointerDown={(event) => {
-                    event.preventDefault();
-                    event.stopPropagation();
-                    event.currentTarget.setPointerCapture(event.pointerId);
-                    startCompareDrag(event.clientX);
-                  }}
+                  tabIndex={-1}
                   title="拖动中线查看对比"
                   aria-label="拖动中线查看对比"
                 >
                   &lt;&gt;
                 </button>
+                <input
+                  type="range"
+                  min={0}
+                  max={100}
+                  step={0.1}
+                  value={compareSplitPercent}
+                  data-canvas-no-drag="true"
+                  aria-label="新旧图对比滑块"
+                  className="absolute inset-0 z-50 h-full w-full cursor-col-resize appearance-none bg-transparent opacity-0"
+                  onPointerDown={(event) => {
+                    event.stopPropagation();
+                    setIsCompareDragging(true);
+                  }}
+                  onPointerUp={(event) => {
+                    event.stopPropagation();
+                    setIsCompareDragging(false);
+                  }}
+                  onPointerCancel={() => {
+                    setIsCompareDragging(false);
+                  }}
+                  onClick={(event) => {
+                    event.stopPropagation();
+                  }}
+                  onInput={(event) => {
+                    const value = Number((event.target as HTMLInputElement).value);
+                    if (!Number.isNaN(value)) {
+                      setCompareSplitPercent(Math.max(0, Math.min(100, value)));
+                    }
+                  }}
+                  onChange={(event) => {
+                    const value = Number(event.target.value);
+                    if (!Number.isNaN(value)) {
+                      setCompareSplitPercent(Math.max(0, Math.min(100, value)));
+                    }
+                  }}
+                />
                 <div className="pointer-events-none absolute left-2 top-2 rounded bg-black/55 px-1.5 py-0.5 text-[10px] text-white">
                   原图
                 </div>
@@ -1695,6 +1664,9 @@ export function ImageNode({ node, isSelected }: ImageNodeProps) {
               <button
                 type="button"
                 className="absolute top-2 right-2 z-40 inline-flex h-8 w-8 items-center justify-center rounded-full border border-white/70 bg-black/70 text-white transition-colors hover:bg-black/80"
+                onPointerDown={(event) => {
+                  event.stopPropagation();
+                }}
                 onClick={(event) => {
                   event.stopPropagation();
                   setIsCompareMode((prev) => !prev);