fix: 🐛 columnWidth

Author: xzdarcy

src/components/edit_area/edit_area.tsx

@@ -182,7 +182,7 @@ export const EditArea = React.forwardRef<EditAreaState, EditAreaProps>((props, r
               rowCount={heights.length}
               ref={gridRef}
               cellRenderer={cellRenderer}
-              columnWidth={Math.max(scaleCount * scaleWidth, width)}
+              columnWidth={Math.max(scaleCount * scaleWidth + startLeft, width)}
               width={width}
               height={height}
               rowHeight={({ index }) => heights[index] || rowHeight}

src/components/time_area/time_area.tsx

@@ -56,7 +56,7 @@ export const TimeArea: FC<TimeAreaProps> = ({ setCursor, hideCursor, scale, scal
             <>
               <Grid
                 ref={gridRef}
-                columnCount={showUnit ? scaleCount * scaleSplitCount : scaleCount}
+                columnCount={showUnit ? scaleCount * scaleSplitCount + 1 : scaleCount}
                 columnWidth={getColumnWidth}
                 rowCount={1}
                 rowHeight={height}