Batch 1 of the locale expansion: Greek, Croatian, Serbian, Lithuanian, Estonian, Latvian, Slovenian, Maltese and Irish across the dashboard catalog, docs mirrors, CLI catalog, README, locale index and the site. 42 → 51 locales.
Also fixes the ICU literal escape the translation backend dropped around angle placeholders, four translations that invented or renamed a placeholder, the language bars that linked to mirrors that do not exist, and the migration count drift (171 → 172).
⚠️ base-red inherited: #12732 — the four unit shards and Fast Quality Gates fail identically on unrelated PRs cut from the same base.
- Add az locale to config/i18n.json (source of truth, 42 locales total)
- Create src/i18n/messages/az.json (UI strings from en.json base)
- Create docs/i18n/az/ directory with full documentation set
- Add 🇦🇿 Azərbaycan dili to README.md language bar
- Add az entry to docs/i18n/README.md index (40 doc languages)
- Add az to generate-multilang.mjs LOCALE_SPECS (Google TL: az)
- Add az to i18n_autotranslate.py lang_map
- Update CHANGELOG.md with feat(i18n) entry