fix(openclaw): env

[tiennm99]

Changes

• The service configuration UI in OpenClaw edit SERVICE_USER_OPENCLAW instead of AUTH_USERNAME

Issues

• In the service configuration UI, if we change the username value, it just changes the AUTH_USERNAME but not SERVICE_USER_OPENCLAW. It causes fail when authenticate to access the web url.

Category

• Bug fix
• Improvement
• New feature
• Adding new one click service
• Fixing or updating existing one click service

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Testing

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• I have read and understood the contributor guidelines. If I have failed to follow any guideline, I understand that this PR may be closed without review.
• I have searched existing issues and pull requests (including closed ones) to ensure this isn't a duplicate.
• I have tested all the changes thoroughly with a local development instance of Coolify and I am confident that they will work as expected when a maintainer tests them.

The change is so simple, so I don't run test yet (my workspace doesn't have php yet)