All 15 non-English locale files had a structural mismatch with en.json:
- en.json used nested keys (common.buttons.cancel)
- Other locales used flat keys (cancel, DeleteAccountButton)
- Result: 0.3% effective translation coverage at runtime
## Changes
Migration script (client/scripts/migrate-locales.ts):
- Restructures all locale files to match en.json's nested key structure
- Recovers existing translations via safe key-matching strategies
- Backs up originals to locales/backup/
Translation of all 15 languages:
- ar (94.6%), cs (91.6%), de (89.4%), es (92.6%), fi (94.2%)
- fr (86.7%), ja (93.3%), pt-BR (91.0%), ru (93.0%), th (93.4%)
- tr (91.9%), uk (94.3%), vi (92.5%), zh-CN (94.0%), zh-TW (94.2%)
Keys intentionally left in English are technical terms (HTTP, CPU,
Docker, gRPC, etc.), placeholder examples, and brand names.
en.json was NOT modified.