feat(node): watch LC_MESSAGES catalogs

[ragnarok22]

Summary

• extend the translation watcher to observe locale files inside LC_MESSAGES folders
• update locale extraction logic to handle nested catalog paths
• expand watcher tests to cover LC_MESSAGES patterns and safety behaviour

Testing

• pnpm vitest packages/node/test/watcher.test.ts --run

---

https://chatgpt.com/codex/tasks/task_e_68f93511515c832c884c40f6d28d0094

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.27%. Comparing base (437f8c3) to head (52ab1da).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/node/src/watcher.ts	80.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
- Coverage   83.34%   83.27%   -0.08%     
==========================================
  Files          29       29              
  Lines        3219     3240      +21     
  Branches      813      812       -1     
==========================================
+ Hits         2683     2698      +15     
- Misses        536      542       +6     

Flag	Coverage Δ
cli	83.27% <80.00%> (?)
core	83.27% <80.00%> (?)
monorepo	83.27% <80.00%> (?)
node	83.27% <80.00%> (-0.08%)	⬇️
react	83.27% <80.00%> (-0.08%)	⬇️
vue	83.27% <80.00%> (-0.08%)	⬇️
web	83.27% <80.00%> (-0.08%)	⬇️

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Files with missing lines	Coverage Δ
packages/node/src/watcher.ts	92.94% <80.00%> (-3.35%)	⬇️

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