[SBTW-1940] Optimize Interactive Demo

[hello-mansoo]

Changes

• Add exception to prevent call when bodyInput is invalid (empty array or just include one object - bodyInput must includes 2 objects, role, and message)
• Add apiHost props and type definition to adjust cdn api endpoint

ticket: []

Additional Notes

Checklist

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• [Required] A self-review has been conducted to ensure there are no minor mistakes.
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[hello-mansoo]

@bang9 위에 적어주신 커멘트 외에는 추가로 리뷰 주실 사항이 없지 않을까 예상되어, 먼저 머지하고 배포해 최적화가 잘 되었는지 모니터링 해 보고자 합니다.
혹시 추가로 리뷰를 주실 사항이 있다면 새롭게 브랜치 생성해서 추가로 대응할께요!
꼼꼼하게 봐 주셔서 감사해요, 아이렌:)