ActiveTasks v0.2.0-14

PUNCH_LIST: harden against user edits to the shared Sheet

Scoped at the user's request ("make it very hard for user input to break
either app"; specifically, a renamed description needs graceful handling
in ActiveTasks). Diagnoses two concrete failure modes already reachable
today: a renamed description orphans a stuck, un-dismissable duplicate
card (mergeImportedToDoItems is add-only by design), and renaming the
whole tab makes that orphan permanently unreachable once the new
hide-unreferred-lists carousel behavior drops the old tab name from
known_lists. Also flags a related, not-yet-hit duplicate-id crash risk
(CarouselScreen's LazyColumn keys by item id with no de-dup guard - the
same bug class MicroTasking already hit and fixed).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>