Follows #5801 for the remaining numeric env reads that break on an empty
value (`-e VAR=`, or `${VAR}` with VAR unset):
- The WeChat QR worker guard read a blank GATEWAY_WORKERS as an invalid
count and refused QR login, although the compose command starts one
worker for it (`--workers ${GATEWAY_WORKERS:-1}`) and the other worker
checks treat it as 1. A blank value now falls through to WEB_CONCURRENCY
and then 1, so the guard still fails closed for real multi-worker setups.
- The Lark broker aborted startup on int("") for a blank
DEERFLOW_LARK_BROKER_PORT or DEERFLOW_LARK_BROKER_TIMEOUT; it now uses the
defaults.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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