Embedded with profile-config {"locale":"ar"}, this dashboard rendered entirely
in English. Not a missing catalogue and not a missing i18n install — the install
was there, one line short of being usable.
ProfileLoader is the root of this custom element, and vue-i18n's useI18n()
cannot resolve its injection at a custom-element root. So ProfileLoader takes
the i18n INSTANCE by reference through inject('appI18n') and drives its global
locale from the host's config. This entry called createAppI18n() and installed
it, but never provided it under that key, so the inject returned null and the
watchEffect that applies the locale quietly did nothing.
The sibling map entry (doxa-research-map/index.js:66) has always provided it,
and this file's own header calls itself a mirror of that one. That is how the
divergence survived: the two read as identical plumbing until you diff them.
MEASURED with check:host-locale-contract, before and after:
research-dashboard/research-dashboard host 0 of 1891 -> host 75 of 1891
75, not 1891, and the remainder has the one known cause already recorded against
Big Picture: most of this dashboard's chrome is read through tStatic, which
resolves the locale from the URL and the document and cannot see a locale set at
runtime. That change is parked behind another agent's landing in the same file.