Restore main's compile-checked formatting, generalised to N catalogs: build.rs
writes one tr_format! arm per English message that matches on the active
language and calls format! with that language's translation (English is the
fallback arm). The runtime substitution dropped format specs ({:.1}, {:+},
{:.0}%), e.g. the smart-preview size and the merge progress percentage.
- formats catalogs use main's convention again ({0}/{1} for reordering, {:.0}
to consume an unused plural suffix); zh-hans converted, with the size and
percentage placeholders fixed by hand
- build.rs: auto-discovers locales/*-formats.json, validates the code
(^[a-z]+(-[a-z]+)*$), fails when the catalogs' keys differ, and reruns
when the locales directory changes
- zh-hans: translate the strings main added since the PR branched
- test: precision, sign and reordered positional values survive in every
language
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>