refactor(miniapp): migrate from antd/styled-components to Tailwind + @cherrystudio/ui

[chengcheng84]

What this PR does

Before this PR:

• UI components: antd
• Styling: styled-components
• Icons: @ant-design/icons

After this PR:

• UI components: @cherrystudio/ui (Tailwind + Shadcn UI)
• Styling: Tailwind CSS
• Icons: lucide-react

Breaking changes

None. Pure refactor with no functional changes.

Special notes for your reviewer

This PR is the follow-up to R2-I6 from #14049 review.

Checklist

• PR: The PR description is expressive enough and will help future contributors
• Code: Write code that humans can understand and Keep it simple
• Refactor: You have left the code cleaner than you found it (Boy Scout Rule)
• Upgrade: Impact of this change on upgrade flows was considered and addressed if required
• Documentation: A user-guide update was considered and is present or not required (N/A for internal refactor)
• Self-review: I have reviewed my own code before requesting review from others

Release note

NONE (internal refactor, no user-facing changes)

[chengcheng84]

@DeJeune Would appreciate a review whenever you have bandwidth.

Thanks for your time!