전략편집기 수정

frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx

@@ -1308,32 +1308,26 @@ function StrategyEditorCanvasInner({
       if (anchorId) {
         updatePreviewRef.current(anchorId, flowPos);
         lastPreviewAnchorRef.current = anchorId;
-        return;
-      }
-      if (lastPreviewAnchorRef.current != null) {
-        lastPreviewAnchorRef.current = null;
-        lastPreviewKeyRef.current = null;
-        clearPreviewRef.current();
       }
     };
+    document.addEventListener('dragover', onDocDragOver, { passive: false });
+    return () => document.removeEventListener('dragover', onDocDragOver);
+  }, []);
+
+  useEffect(() => {
     const onDocDragEnd = () => {
       lastPreviewAnchorRef.current = null;
       lastPreviewKeyRef.current = null;
       clearPreviewRef.current();
       markPaletteHtmlDragEnd();
     };
-    document.addEventListener('dragover', onDocDragOver, { passive: false });
-    document.addEventListener('drag', onDocDragOver);
     document.addEventListener('dragend', onDocDragEnd);
     return () => {
-      document.removeEventListener('dragover', onDocDragOver);
-      document.removeEventListener('drag', onDocDragOver);
       document.removeEventListener('dragend', onDocDragEnd);
     };
   }, []);
 
   useEffect(() => {
-    if (!needsPointerPaletteDrag()) return;
     return subscribePaletteDrag((ev: PaletteDragEvent) => {
       if (ev.phase === 'move') {
         const { flowPos, anchorId } = resolveDropFromClientRef.current(ev.x, ev.y);