feat(i18n): add Vietnamese (vi) locale

Add Vietnamese translation with all 1572 keys matching en.json.
Register "vi" in SUPPORTED_LANGUAGES, LANGUAGE_FALLBACKS, and
settings dialog language type assertion. Update locale count
from 8 to 9 in docs (AGENTS.md, CONTRIBUTING.md) to account
for previously-omitted Korean (ko).
This commit is contained in:
huy97
2026-05-30 23:13:08 +07:00
parent 072cb24e5b
commit ddfdf68dd1
5 changed files with 1935 additions and 8 deletions
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