The deploy workflow was writing PORT=3800 and ZY_SITE_MODE=production
into .env.app, which gets loaded by ecosystem.config.js's loadEnvFile().
Since ...appEnv is spread first and instance-specific values override it,
this is now safe — but removing them from .env.app eliminates the root
cause entirely (belt-and-suspenders fix).
Agent-Logs-Url: https://github.com/qinfendebingshuo/guanghulab/sessions/80f409c9-7f98-443e-9c31-21111194a523
Co-authored-by: qinfendebingshuo <207279273+qinfendebingshuo@users.noreply.github.com>
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