Overwrite frontend for JH new purchasing flow

What does this MR do and why?

Overwrite frontend for JH new purchasing flow Describe in detail what your merge request does and why.

Screenshots or screen recordings

git pull
git checkout feat/enable-new-purchase-flows

Related CustomerDot MR

https://jihulab.com/gitlab-cn/internal/customers-jihulab-com/-/merge_requests/253

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.