LinkReader 500 (or other trigger_status) used to be gated by an extra
allowed_domains whitelist on the tenant API side, so URLs like
m.baidu.com/bh/m/detail/... fell straight through to the user with a raw
"webpage parser failed" message. Drop the whitelist gate — enabled +
trigger_status is enough — and surface a friendly Chinese prompt when
both LinkReader and the lightpanda fallback give up. Full error chain
is kept in the logger for debugging.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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