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.
For all 40 locales, move docs/i18n/<lang>/docs/<DOC>.md into the matching
subfolder (architecture/, guides/, reference/, ...). Mirror references in
docs/i18n/<lang>/{llm.txt,CHANGELOG.md,CONTRIBUTING.md,README.md} are also
rewritten to the new paths so the i18n llm.txt mirror check stays byte-equal
to the root llm.txt body.
These are mechanical moves only — actual translations remain unchanged and
will be regenerated incrementally in FASE 5 (hash-based pipeline).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
