Show the language model's opinion on a message

When inbuxa-server's AI spam classification is on, it records the model's
answer in an X-Spam-LLM header: a tag (LLM_<category>[_<confidence>]) and,
in parentheses, the model's explanation. The full message now asks for it,
and where it's there:

- the message details show "Language model's opinion" beside the spam
  filter's own working, with category, confidence and explanation;
- a message in Junk carries a banner saying the same.

Both say it's one of several signals the spam filter weighed, never the
reason on its own, as the server's spec requires. The explanation is model
output and is only ever rendered as text. Nothing shows without the header,
so a server without the feature, or with it off, looks as before.

Translations: two new strings, "Language model's opinion" and "One of
several signals the spam filter weighed", in all eight catalogues (16
entries). Category and confidence come from the server and aren't
translated.

web/src/locales/de.ts

@@ -1740,6 +1740,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "Zur Bestätigung {phrase} eingeben",
     "Turn off legacy protocols": "Ältere Mailprotokolle ausschalten",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "Ältere Mailprotokolle sind für Ihre Organisation ausgeschaltet. Nur {app} und JMAP-Apps können sich anmelden.",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "Einschätzung des Sprachmodells",
+    "One of several signals the spam filter weighed": "Eines von mehreren Signalen, die der Spamfilter berücksichtigt hat",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/es.ts

@@ -1713,6 +1713,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "Para confirmar, escriba {phrase}",
     "Turn off legacy protocols": "Desactivar los protocolos de correo heredados",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "Los protocolos de correo heredados están desactivados para su organización. Solo {app} y las aplicaciones JMAP pueden iniciar sesión.",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "Opinión del modelo de lenguaje",
+    "One of several signals the spam filter weighed": "Una de varias señales que el filtro de spam ha tenido en cuenta",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/fr.ts

@@ -1718,6 +1718,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "Pour confirmer, saisissez {phrase}",
     "Turn off legacy protocols": "Désactiver les protocoles de messagerie historiques",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "Les protocoles de messagerie historiques sont désactivés pour votre organisation. Seuls {app} et les applications JMAP peuvent se connecter.",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "Avis du modèle de langage",
+    "One of several signals the spam filter weighed": "Un signal parmi d'autres pris en compte par le filtre antispam",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/ja.ts

@@ -1721,6 +1721,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "確認のため {phrase} と入力してください",
     "Turn off legacy protocols": "従来のメールプロトコルをオフにする",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "組織では従来のメールプロトコルがオフになっています。サインインできるのは {app} と JMAP アプリのみです。",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "言語モデルの見解",
+    "One of several signals the spam filter weighed": "迷惑メールフィルターが考慮した複数の判断材料のひとつ",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/nl.ts

@@ -1710,6 +1710,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "Typ ter bevestiging {phrase}",
     "Turn off legacy protocols": "Verouderde mailprotocollen uitschakelen",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "Verouderde mailprotocollen zijn uitgeschakeld voor uw organisatie. Alleen {app} en JMAP-apps kunnen inloggen.",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "Oordeel van het taalmodel",
+    "One of several signals the spam filter weighed": "Een van meerdere signalen die het spamfilter heeft meegewogen",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/pt-BR.ts

@@ -1716,6 +1716,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "Para confirmar, digite {phrase}",
     "Turn off legacy protocols": "Desativar os protocolos de e-mail legados",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "Os protocolos de e-mail legados estão desativados para sua organização. Só {app} e aplicativos JMAP podem entrar.",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "Opinião do modelo de linguagem",
+    "One of several signals the spam filter weighed": "Um dos vários sinais considerados pelo filtro de spam",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/ru.ts

@@ -1715,6 +1715,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "Для подтверждения введите {phrase}",
     "Turn off legacy protocols": "Отключить устаревшие почтовые протоколы",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "Устаревшие почтовые протоколы отключены для вашей организации. Входить могут только {app} и приложения JMAP.",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "Мнение языковой модели",
+    "One of several signals the spam filter weighed": "Один из нескольких признаков, которые учёл спам-фильтр",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/uk.ts

@@ -1709,6 +1709,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "Для підтвердження введіть {phrase}",
     "Turn off legacy protocols": "Вимкнути застарілі поштові протоколи",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "Застарілі поштові протоколи вимкнено для вашої організації. Входити можуть лише {app} і програми JMAP.",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "Думка мовної моделі",
+    "One of several signals the spam filter weighed": "Одна з кількох ознак, які врахував спам-фільтр",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────

web/src/locales/zh-Hans.ts

@@ -1720,6 +1720,9 @@ export const catalog: Catalog = {
     "To confirm, type {phrase}": "请输入 {phrase} 以确认",
     "Turn off legacy protocols": "关闭传统邮件协议",
     "Legacy mail protocols are off for your organization. Only {app} and JMAP apps can sign in.": "您的组织已关闭传统邮件协议。只有 {app} 和 JMAP 应用可以登录。",
+    // ── Spam filter: the language model's opinion (inbuxa) ──────────
+    "Language model's opinion": "语言模型的判断",
+    "One of several signals the spam filter weighed": "垃圾邮件过滤考虑的多个信号之一",
   },
   plurals: {
     // ── Administration: legacy mail protocols (INBUXA) ──────────────