chore(i18n): replace remaining assistant-product references with neutral terms across six locales

Rewrite two strings that still leaked the forbidden assistant-product
vocabulary across every locale bundle:

- `account.timezoneHint` — drop "AI Coach context" / "AI-Coach-Kontext"
  in favour of "Coach context" / "Coach-Kontext".
- `i18n.maintainershipBanner.notice` — recast the AI-authorship
  disclosure as "machine-translated" / "maschinell übersetzt" /
  "traduit automatiquement" / "traducido automáticamente" / "tradotta
  automaticamente" / "tłumaczona maszynowo" so the operational meaning
  is preserved without surfacing assistant-product naming.

Document the two exempt-by-necessity vendor labels in
`docs/audit/v1427-summary.md`: the provider-chooser dropdown options
that render `Anthropic (Claude)` because the user is selecting the
actual vendor product, and the GitHub source-URL on `/about` whose
username segment is an irreducible technical identifier.

docs/audit/v1427-summary.md

@@ -70,3 +70,29 @@ The two MMDB files add ~80 MB to the production image. The
 `tzdata`-bearing Alpine runner stage already sits at ~330 MB
 compressed; the v1.4.27 image lands well under the 90 MB image-size
 delta budget set out in the fix plan.
+
+## Convention-compliance exemptions
+
+The release-wide convention forbids the substrings `AI`, `Claude`,
+`agent`, `marathon`, `wave`, `phase`, `session`, `subagent`, and
+`Anthropic` in user-facing artifacts. Two exemptions remain by
+necessity and are recorded here so future audits can stop re-opening
+the same finding:
+
+- **Vendor-name dropdown options.** The Coach provider chooser in
+  `/settings/ai` renders the literal vendor names so the operator can
+  recognise which third-party service is being configured. The keys
+  `settings.ai.providerOptions.anthropic` and
+  `settings.ai.activeProviderOptions.anthropic` therefore render
+  `Anthropic (Claude)` across all six locale bundles. Rebranding
+  these would break the recognition the dropdown exists to provide.
+  The exemption applies to any vendor label whose product is the
+  setting being chosen, e.g. `OpenAI`, `Anthropic`, `Codex`.
+- **GitHub repository URL on `/about`.** The source-link on the
+  public about page renders
+  `https://github.com/MBombeck/HealthLog`. The username segment is an
+  irreducible technical identifier for the URL and cannot be hidden
+  without breaking the link. The directive's spirit — never surface
+  the maintainer's full name in prose — is honoured: the `/about`
+  page never spells "Marc" or "Bombeck" in body copy, only inside
+  the URL.

messages/de.json

@@ -1595,7 +1595,7 @@
     "genderFemale": "Weiblich",
     "genderHint": "Wird für geschlechtsspezifische Zielwerte verwendet.",
     "timezone": "Zeitzone",
-    "timezoneHint": "Wird für Diagrammachsen, Erinnerungszeiten, Export-Zeitstempel und den AI-Coach-Kontext verwendet. Gespeicherte Daten bleiben unverändert.",
+    "timezoneHint": "Wird für Diagrammachsen, Erinnerungszeiten, Export-Zeitstempel und den Coach-Kontext verwendet. Gespeicherte Daten bleiben unverändert.",
     "timezoneDetect": "Browser-Zeitzone übernehmen ({tz})",
     "timezoneInvalid": "Keine gültige IANA-Zeitzone.",
     "profileSaved": "Profil gespeichert",
@@ -2658,7 +2658,7 @@
   },
   "i18n": {
     "maintainershipBanner": {
-      "notice": "Diese Sprachversion ist KI-entworfen, inklusive der sicherheitskritischen Coach-Anweisungen. Automatisierte Validierung läuft in CI; KI-Coach-Regressionen bitte auf GitHub melden.",
+      "notice": "Diese Sprachversion ist maschinell übersetzt, inklusive der sicherheitskritischen Coach-Anweisungen. Eine automatische Drift-Prüfung läuft in CI; Coach-Regressionen bitte auf GitHub melden.",
       "cta": "Auf GitHub melden",
       "dismiss": "Schließen"
     }

messages/en.json

@@ -1595,7 +1595,7 @@
     "genderFemale": "Female",
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Timezone",
-    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and AI Coach context. Stored data is unchanged.",
+    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
     "timezoneDetect": "Use browser timezone ({tz})",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
@@ -2658,7 +2658,7 @@
   },
   "i18n": {
     "maintainershipBanner": {
-      "notice": "This locale is AI-drafted including the Coach's safety-critical instructions. Automated validation runs in CI; please report any AI Coach regressions on GitHub.",
+      "notice": "This locale is machine-translated including the Coach's safety-critical instructions. Automated drift-guard runs in CI; please report any Coach regressions on GitHub.",
       "cta": "Report on GitHub",
       "dismiss": "Dismiss"
     }

messages/es.json

@@ -1595,7 +1595,7 @@
     "genderFemale": "Mujer",
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Zona horaria",
-    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and AI Coach context. Stored data is unchanged.",
+    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
     "timezoneDetect": "Use browser timezone ({tz})",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
@@ -2658,7 +2658,7 @@
   },
   "i18n": {
     "maintainershipBanner": {
-      "notice": "Este idioma está redactado por IA, incluidas las instrucciones críticas para la seguridad del Coach. La validación automática se ejecuta en CI; informe de cualquier regresión del Coach IA en GitHub.",
+      "notice": "Este idioma está traducido automáticamente, incluidas las instrucciones críticas para la seguridad del Coach. Un control de deriva automático se ejecuta en CI; informe de cualquier regresión del Coach en GitHub.",
       "cta": "Informar en GitHub",
       "dismiss": "Cerrar"
     }

messages/fr.json

@@ -1595,7 +1595,7 @@
     "genderFemale": "Femme",
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Fuseau horaire",
-    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and AI Coach context. Stored data is unchanged.",
+    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
     "timezoneDetect": "Use browser timezone ({tz})",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
@@ -2658,7 +2658,7 @@
   },
   "i18n": {
     "maintainershipBanner": {
-      "notice": "Cette langue est rédigée par IA, y compris les instructions critiques pour la sécurité du Coach. Une validation automatique tourne en CI ; signalez toute régression du Coach IA sur GitHub.",
+      "notice": "Cette langue est traduite automatiquement, y compris les instructions critiques pour la sécurité du Coach. Un contrôle de dérive automatique tourne en CI ; signalez toute régression du Coach sur GitHub.",
       "cta": "Signaler sur GitHub",
       "dismiss": "Ignorer"
     }

messages/it.json

@@ -1595,7 +1595,7 @@
     "genderFemale": "Donna",
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Fuso orario",
-    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and AI Coach context. Stored data is unchanged.",
+    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
     "timezoneDetect": "Use browser timezone ({tz})",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
@@ -2658,7 +2658,7 @@
   },
   "i18n": {
     "maintainershipBanner": {
-      "notice": "Questa lingua è redatta tramite IA, incluse le istruzioni critiche per la sicurezza del Coach. La validazione automatica gira in CI; segnali qualsiasi regressione del Coach IA su GitHub.",
+      "notice": "Questa lingua è tradotta automaticamente, incluse le istruzioni critiche per la sicurezza del Coach. Un controllo di deriva automatico gira in CI; segnali qualsiasi regressione del Coach su GitHub.",
       "cta": "Segnala su GitHub",
       "dismiss": "Chiudi"
     }

messages/pl.json

@@ -1595,7 +1595,7 @@
     "genderFemale": "Kobieta",
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Strefa czasowa",
-    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and AI Coach context. Stored data is unchanged.",
+    "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
     "timezoneDetect": "Use browser timezone ({tz})",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
@@ -2658,7 +2658,7 @@
   },
   "i18n": {
     "maintainershipBanner": {
-      "notice": "Ta wersja językowa jest opracowana przez AI, w tym instrukcje krytyczne dla bezpieczeństwa Coacha. Walidacja automatyczna działa w CI; proszę zgłaszać wszelkie regresje Coacha AI na GitHubie.",
+      "notice": "Ta wersja językowa jest tłumaczona maszynowo, w tym instrukcje krytyczne dla bezpieczeństwa Coacha. Automatyczna kontrola dryftu działa w CI; proszę zgłaszać wszelkie regresje Coacha na GitHubie.",
       "cta": "Zgłoś na GitHubie",
       "dismiss": "Zamknij"
     }