Bug: panEnd gesture does not get the right spot on the barline always gets the first spot

The panEnd gesture always returns the 1st point on the barline, it does not return the correct spot it was stopped. I was able to view this by logging out where the panEnd stops. It should stop at the last update point but it resets back to one.


Start by locating the panEnd gesture handling and the bar chart touch-selection logic in the Flutter chart code. Reproduce a gesture that stops away from the first barline point and inspect the logged stopping position. Done means panEnd preserves the last update point instead of resetting to the first point.

Written by the indexing model from the issue text.