fix(market): returning an item to the club ends its auction; close the panel probe

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.

docs/FIFA17_TRANSFER_MARKET_WIRE.md

@@ -269,3 +269,64 @@ perfectly while still being behaviourally wrong, because FIFA expects an **evolv
 server-side state machine** rather than a static object that looks like one. The
 frozen `expires` is the canonical example: every field was the right name, type and
 vocabulary, and the feature was still broken.
+
+---
+
+## INVESTIGATION CLOSED — active own auction is not seller-actionable
+
+**Do not reopen without new direct FIFA17.exe evidence contradicting the lifecycle
+below.** The correct FIFA 17 lifecycle is:
+
+```text
+ACTIVE AUCTION      tradeState=active, expires>0/counting down
+                    -> seller CANNOT withdraw it through Transfer List actions
+                    -> the item is not seller-actionable while the auction runs
+
+EXPIRED UNSOLD      tradeState=expired, expires=0
+                    -> the item becomes actionable again
+                    -> relist / return-to-club / other expired-item actions
+```
+
+### Confidence tags
+
+```text
+CONFIRMED — live FIFA17.exe:
+    active listing with ticking expires is NON-selectable
+    expired listing IS selectable
+    relisting makes it active and therefore non-selectable again
+    no cancel request is ever emitted by the client
+    expires must advance with the wall clock
+    no button prompt is offered on the Transfer List for an active auction
+
+CONFIRMED — local RE corpus:
+    every CardsDLL-side prerequisite passes (IS_TRADING_ENABLED=1,
+        TRADE_PILE_SIZE=100, watch-list=50, item+0x49 tradeable)
+    MAY_BE_REMOVED is a CONSTANT 1 — it cannot be the gate and the server
+        cannot move it
+    the eight-flag array FUN_18003e370 publishes is the CLUB-CARD Actions menu
+        and contains NO transfer-auction cancellation flag
+    the auction parser is limited to the known twelve atoms
+
+HISTORICAL FUT / FIFA17-era:
+    active auctions are committed until sale or expiry
+    expired Transfer List items expose relist/return actions
+    FIFA 17 trading guidance tells players to relist once auctions expire
+
+UNKNOWN, and no longer required for backend fidelity:
+    the exact Flash/ActionScript branch that makes active cards non-selectable
+```
+
+### Explicitly out of scope now
+
+Do NOT add auction fields, change `itemState`, revisit `tradeOwner`, probe
+`MAY_BE_REMOVED`, add an active-auction cancel feature, or disassemble Flash in
+order to make active auctions selectable. Three of those were already tried and
+refuted; the rest are ruled out above.
+
+### Return-to-club transition (implemented)
+
+A pile move to `club` now ENDS any `active` auction on that item. Without it the
+pile reads `club` while the listing 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 silently appears to do nothing. `reserved` (mid-sale) and `sold`
+rows are never touched, so a card can never be both sold and returned.