fix: support braces in catalog pathname

[timsluis]

Description

This PR fixes catalog path matching when translation files live under paths that contain literal { and } characters.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Examples update

Fixes #2494

Checklist

• I have read the CONTRIBUTING and CODE_OF_CONDUCT docs
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation (if appropriate)

[vercel]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.21%. Comparing base (6bb8983) to head (d5b4809).
⚠️ Report is 266 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2495      +/-   ##
==========================================
+ Coverage   77.05%   81.21%   +4.16%     
==========================================
  Files          84      104      +20     
  Lines        2157     2720     +563     
  Branches      555      725     +170     
==========================================
+ Hits         1662     2209     +547     
+ Misses        382      364      -18     
- Partials      113      147      +34     

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Project	Deployment	Actions	Updated (UTC)
js-lingui	Ready	Preview	Apr 3, 2026 6:23am

[andrii-bodnar]

@timsluis thank you!