fix(profile): sort localized tags using Chinese collation

[HankAviator]

Describe briefly what this PR is doing and why.

Fixes #9228

Testing

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Backend checklist

• Added tests for any new code or added a regression test if fixing a bug
• Run the backend locally and it works
• Added migrations if there are any database changes, rebased onto develop if necessary for linear migration history

Web frontend checklist

• There are no console warnings when running the app
• Added tests where relevant
• Clicked around my changes running locally and it works
• Checked Desktop, Mobile and Tablet screen sizes

For maintainers

• Maintainers can push commits to my branch
• Maintainers can merge this PR for me

[CouchersBot]

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couchers-devtool://expo-development-client/?url=https%3A%2F%2Fb37e06cb--ota.preview.couchershq.org%2Fios%2Fmanifest

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Backend

Schema	Schema diff	Sample emails

Other

Protos	Backend coverage	Web coverage

[tristanlabelle]

Great find, thanks! A few comments before we merge, or let me know if you want to hand it off to me.

[HankAviator]

Pushed a new commit to address all comments, thanks @tristanlabelle !

[tristanlabelle]

Thanks!

[github-actions]

📝 Release Notes

This PR should be included in the release notes.

Suggested release note:

Fixed profile language and region tags sorting in Chinese so lists appear in a more natural, localized order

🤖 Bot Debug Information

Model: couchers.openai.gpt-5.4
Decision: include
Reasoning: This fixes a noticeable user-facing bug in profile tag lists for Chinese users by sorting localized language/region tags in a culturally appropriate order, improving usability of profile editing.