989d5d0cb7
Provider catalogs surface date-pinned snapshots (`…-20251101`) that the
picker rendered as standalone rows with the date baked into the name
("Opus 4 5 20251101"). Strip the trailing date from display names, and
fold a snapshot out of the list when its rolling alias is present so the
alias stays selectable/searchable while the exact dated id isn't shown
as its own row.