Show/Select week number on date calendar

In a date calendar, is there a way to allow the user to select the week number and the calendar move to that week ?

The issue names no files or tests. Start by locating the date-calendar component and its week-navigation entry point, then clarify whether week numbers should be displayed, selectable, and how selection changes the view. Done means the behavior is agreed, implemented, and verified.

Written by the indexing model from the issue text.