feat(server) fix error cannot read properties of undefined

[HUAHUAI23]

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Name	Status	Preview	Comments	Updated (UTC)
laf	❌ Failed (Inspect)			Apr 12, 2024 7:05am

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[github-actions]

💥 laf server image built successfully for pr 1954

ghcr.io/labring/laf-server:pr-1954
docker.io/lafyun/laf-server:pr-1954

digest: sha256:477660dc64d5f3807794ec727dcd8637d7ee06766130494608ef6b7ff2c16687