EraCode practice

Preserve filters while navigating (URLSearchParams + router)

Next.jsintermediateMulti-Part

Summary

Quick practice on Next.js navigation: keep existing query params when routing to a new path.

Problem preview

### Goal Implement a tiny navigation helper that **keeps the current query string** when moving to a different path. - Return a URL string that uses but preserves all existing search params. - If the…

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