trade_route now resolves the auction from its tradeId and, on buy-now
(bid >= buyNowPrice), spends coins + grants the won card to the club + echoes
the CLOSED auction (FutISOfferTrade shape). Reuses the validated auction record
(0x18013e410) so it stays freeze-safe; whether FIFA surfaces the won item
post-buy is functional (needs live test). Insufficient funds -> 461.
tools/test_market_buy.py: offline unit test on a TEMP profile (never touches the
real save) -- verifies coin deduction, card grant, closed-auction shape, and the
461 path. PASS. Read-only contract suite still 311/311.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PN5bmpDVQR1aXgefyWAt7o
funman300
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