Unify 1药城 and 药帮忙 candidates, filter at 4% margin, greedy-split by warehouse rank, and persist allocated qty. Short stock is a business fail; a peer outage with leftover shortfall stays a system fault. No cart, no interface 2.
Import the existing state center, web UI, YiSaiQi callback skeleton, and project docs. Ignore local venvs, node_modules, recordings, and the duplicate state_center copy.
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