fix: theme layer ordering for shadows

[maiieul]

What is it?

• Feature / enhancement
• Bug
• Docs / tests
• Other

Why is it needed?

Checklist:

• My code follows the developer guidelines of this project
• I have performed a self-review of my own code
• I have ran pnpm change and documented my changes
• I have add necessary docs (if needed)
• Added new tests to cover the fix / functionality

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Latest commit: 350d59a

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[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/qwikifiers/qwik-ui@1158

npm i https://pkg.pr.new/qwikifiers/qwik-ui/@qwik-ui/headless@1158

npm i https://pkg.pr.new/qwikifiers/qwik-ui/@qwik-ui/styled@1158

npm i https://pkg.pr.new/qwikifiers/qwik-ui/@qwik-ui/utils@1158

commit: 350d59a