Add translation support with language selector UI#177

Draft

Copilot wants to merge 7 commits intomainfrom

copilot/add-translation-support-ui

Commits on Jan 22, 2026

Initial plan
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Add translation support infrastructure: metadata, language detection, and UI components

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Complete translation UI support with working language selector

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Fix regex patterns to correctly match uppercase country codes (es_ES, fr_FR, etc.)

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Fix race condition in language selector dropdown using queueMicrotask

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Replace custom dropdown with native HTML5 select and remove catalog dependency from workshop component

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Fix code review issues: avoid regex with user input, add URL encoding, and error handling

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