fix(#4031): add cron_model_no_agent_hint to ALL 13 locales (strict locale-parity tests)

The repo enforces every locale defines every English key (test_*_locale.py). Adding the key to
English only broke 6 locale-coverage tests. Added the key (English fallback text) to all 13 locale
blocks. Full suite catches what targeted tests miss.

static/i18n.js

@@ -2853,6 +2853,7 @@ const LOCALES = {
     cron_job_updated: 'Job aggiornato',
     cron_model_label: 'Override del modello',
     cron_model_hint: 'Sostituisce il modello predefinito per questo processo.',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'Predefinito (usa il profilo/sistema predefinito)',
     cron_delete_confirm_title: 'Elimina job pianificato',
     cron_delete_confirm_message: 'Questa azione non può essere annullata.',
@@ -4395,6 +4396,7 @@ const LOCALES = {
     cron_job_updated: 'ジョブを更新しました',
     cron_model_label: 'モデルの上書き',
     cron_model_hint: 'このジョブのデフォルトモデルを上書きします。',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'デフォルト（プロファイル/システムの既定を使用）',
     cron_delete_confirm_title: 'Cronジョブを削除',
     cron_delete_confirm_message: 'この操作は取り消せません。',
@@ -5626,6 +5628,7 @@ const LOCALES = {
     cron_job_updated: 'Задание обновлено',
     cron_model_label: 'Переопределение модели',
     cron_model_hint: 'Переопределяет модель по умолчанию для этого задания.',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'По умолчанию (профиль/системная модель)',
     cron_delete_confirm_title: 'Удалить cron-задание',
     cron_delete_confirm_message: 'Это действие нельзя отменить.',
@@ -8806,6 +8809,7 @@ const LOCALES = {
     cron_job_updated: 'Aufgabe aktualisiert.',
     cron_model_label: 'Modell-Überschreibung',
     cron_model_hint: 'Überschreibt das Standardmodell für diesen Auftrag.',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'Standard (Profil-/Systemstandard verwenden)',
     cron_delete_confirm_title: 'Aufgabe löschen',
     cron_delete_confirm_message: 'Sind Sie sicher?',
@@ -10064,6 +10068,7 @@ const LOCALES = {
     cron_job_updated: '任务已更新',
     cron_model_label: '模型覆盖',
     cron_model_hint: '覆盖此任务的默认模型。',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: '默认（使用配置/系统默认）',
     cron_delete_confirm_title: '删除定时任务',
     cron_delete_confirm_message: '此操作无法撤销。',
@@ -11835,6 +11840,7 @@ const LOCALES = {
     cron_job_updated: '排程任務已更新',
     cron_model_label: '模型覆寫',
     cron_model_hint: '覆寫此工作的預設模型。',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: '預設（使用設定檔／系統預設）',
     cron_delete_confirm_title: '刪除排程任務',
     cron_delete_confirm_message: '此操作無法復原。',
@@ -13192,6 +13198,7 @@ const LOCALES = {
     cron_job_updated: 'Tarefa atualizada',
     cron_model_label: 'Substituir modelo',
     cron_model_hint: 'Substitui o modelo padrão para esta tarefa.',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'Padrão (usar perfil/sistema padrão)',
     cron_delete_confirm_title: 'Excluir tarefa cron',
     cron_delete_confirm_message: 'Isso não pode ser desfeito.',
@@ -16121,6 +16128,7 @@ const LOCALES = {
     cron_job_updated: 'Emploi mis à jour',
     cron_model_label: 'Remplacement du modèle',
     cron_model_hint: 'Remplace le modèle par défaut pour cette tâche.',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'Par défaut (utiliser le profil/le système)',
     cron_delete_confirm_title: 'Supprimer la tâche cron',
     cron_delete_confirm_message: 'Cela ne peut pas être annulé.',
@@ -17647,6 +17655,7 @@ const LOCALES = {
     cron_job_updated: 'İş güncellendi',
     cron_model_label: 'Model Geçersiz Kılma',
     cron_model_hint: 'Bu iş için varsayılan modeli geçersiz kılar.',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'Varsayılan (profil/sistem varsayılanını kullan)',
     cron_delete_confirm_title: 'Cron işini sil',
     cron_delete_confirm_message: 'Bu geri alınamaz.',
@@ -19267,6 +19276,7 @@ const LOCALES = {
     cron_job_updated: 'Zadanie zaktualizowane',
     cron_model_label: 'Zastąpienie modelu',
     cron_model_hint: 'Zastępuje domyślny model dla tego zadania.',
+    cron_model_no_agent_hint: 'No-agent jobs run the configured script directly; model is unused.',
     cron_model_use_default: 'Domyślny (użyj domyślnego profilu/systemu)',
     cron_delete_confirm_title: 'Usuń zadanie cron',
     cron_delete_confirm_message: 'Tej operacji nie można cofnąć.',