✨ chore: Improve subscription billing fallback and UI states

Add a lightweight active-subscription check to skip subscription pre-consume when none exist, reducing unnecessary transactions and locks. In the subscription UI, disable subscription-first options when no active plan is available, show the effective fallback to wallet with a clear notice, and distinguish “invalidated” from “expired” states. Update i18n strings across supported locales to reflect the new messages and status labels.

web/src/i18n/locales/fr.json

@@ -2692,10 +2692,13 @@
     "我的订阅": "Mes abonnements",
     "个生效中": "actifs",
     "无生效": "Aucun actif",
+    "已保存偏好为": "Préférence enregistrée : ",
+    "，当前无生效订阅，将自动使用钱包": ", aucun abonnement actif, le portefeuille sera utilisé automatiquement.",
     "个已过期": "expirés",
     "订阅": "Abonnement",
     "至": "jusqu'à",
     "过期于": "Expire le",
+    "作废于": "Invalidé le",
     "购买套餐后即可享受模型权益": "Profitez des avantages du modèle après l'achat d'un plan",
     "限购": "Limite",
     "推荐": "Recommandé",