When a session's cwd moves from the main checkout to a newly created
worktree, overlayRepoLanes places it into the matching worktree lane but
never removed the stale entry from the main lane. The session appeared
under both groups until the user left and re-entered the project view.
Add a cross-lane eviction loop that removes the session from all other
lanes before inserting it into the target lane.
liuhao1024
3defb25a42