Feature: intersect:true work in barchart and radar

<img width="520" height="348" alt="Image" src="https://github.com/user-attachments/assets/369400d7-7b09-4f02-9e73-3b18b6cb543a" />

<img width="305" height="261" alt="Image" src="https://github.com/user-attachments/assets/18a21dd0-20bd-4cda-8b72-cd55f11ee1bc" />

want to let the hover be work even if not the exact point in the shadow or dots