4e31fb98a2
CLOSES the active-own-auction Actions-panel investigation. Live client plus the RE corpus plus historical FUT behaviour all agree: an active auction is COMMITTED until sale or expiry and is not seller-actionable, while an expired unsold item becomes actionable (relist / return to club). Every observation fits that lifecycle -- active+frozen expires was non-selectable, expired was selectable and relisted fine, relisting made it active and non-selectable again, and the client never emits a cancel. Documented with confidence tags, and the dead ends are named so they are not retried: MAY_BE_REMOVED is a constant 1, and the eight-flag array is the CLUB-CARD menu with no auction-cancellation flag in it. Implements the return-to-club transition that closure exposes. A pile move to `club` now cancels any ACTIVE listing on that item, because the auction that put the card in the pile has to end with it. Otherwise the pile reads `club` while the row stays `active`, so the card is filtered out of /club (exclusion keys on active listings) AND still rendered in the Transfer List: the move appears to do nothing. This is the same limbo class as the earlier pile-vs-listing bug, found by reasoning about the transition rather than by another live failure. Scoped to `active` only: a `reserved` row is mid-sale and a `sold` row is already gone, so cancelling either would let one card be both sold and returned. Two tests cover exactly that boundary. 338 tests pass, 0 failed, clippy clean.