offset 0일 경우 NaN 처리

src/hooks/useLine.js

@@ -87,6 +87,9 @@ export const useLine = () => {
     removePitchText(line)
     const { startPoint, endPoint, direction, attributes } = line
     const { offset, onlyOffset = false } = attributes
+    if (offset === 0) {
+      return
+    }
 
     let left, top