fix(relecture): un travail vide ou oublie restait affiche et impossible a retirer

Un travail echoue ou expire cote serveur restait dans « Traductions
recentes » : sa page de relecture n'affichait rien (0 segments) avec une
erreur brute non traduite, et aucune suppression n'existait.

- serveur : nouvelle route DELETE /api/v1/translations/{job_id} —
  retire le travail de la memoire et de Redis, supprime ses segments de
  relecture ; idempotente (200 meme si le serveur avait deja oublie le
  travail) ; refuse les travaux en cours (annuler d'abord) ; proprietaire
  seul (404 pour le travail d'autrui, sans reveler son existence)
- interface : bouton corbeille sur chaque ligne des traductions recentes
  (deux clics pour confirmer) qui nettoie la liste locale ET le serveur ;
  l'historique serveur ne liste plus les travaux non termines
- page de relecture : message d'erreur traduit (fini le message brut) et
  etat « rien a relire » explicite avec explication
- libelles ajoutes dans les 13 langues de l'interface
- 5 tests backend nouveaux (tests/test_delete_translation_history.py)

frontend/src/lib/i18n/messages/ar/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "لا توجد أجزاء لمراجعتها في هذه المهمة",
+  "reviews.empty.desc": "لا تحتوي هذه الترجمة على أجزاء محفوظة: إما أنها فشلت قبل ترجمة النص، أو لم يعد الخادم يحتفظ بها. يمكنك إزالتها من قائمة الترجمات الأخيرة."
 }

frontend/src/lib/i18n/messages/de/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "Für diesen Auftrag gibt es nichts zu prüfen",
+  "reviews.empty.desc": "Diese Übersetzung enthält keine gespeicherten Segmente: Entweder ist sie vor der Textübersetzung fehlgeschlagen, oder der Server bewahrt sie nicht mehr auf. Sie können sie aus der Liste der letzten Übersetzungen entfernen."
 }

frontend/src/lib/i18n/messages/en/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "Nothing to review for this job",
+  "reviews.empty.desc": "This translation has no stored segments: either it failed before any text was translated, or it is no longer retained by the server. You can remove it from your recent translations list."
 }

frontend/src/lib/i18n/messages/en/translate.json

@@ -96,6 +96,8 @@
   "translate.downloadFailed": "The download failed. Please try again.",
   "translate.recent.title": "Recent translations",
   "translate.recent.review": "Review",
+  "translate.recent.remove": "Remove from history",
+  "translate.recent.removeConfirm": "Click again to confirm",
   "translate.upload.ariaDropzone": "Upload a document: drag and drop, or press Enter to browse files",
   "translate.cancelAction": "Cancel translation",
   "translate.cancelledTitle": "Translation cancelled",

frontend/src/lib/i18n/messages/es/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "Nada que revisar en este trabajo",
+  "reviews.empty.desc": "Esta traducción no tiene segmentos guardados: o falló antes de traducir el texto, o el servidor ya no la conserva. Puede quitarla de la lista de traducciones recientes."
 }

frontend/src/lib/i18n/messages/fa/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "بخشی برای بازبینی در این کار وجود ندارد",
+  "reviews.empty.desc": "این ترجمه بخش ذخیره‌شده‌ای ندارد: یا پیش از ترجمهٔ متن ناموفق بوده، یا سرور دیگر آن را نگه نمی‌دارد. می‌توانید آن را از فهرست ترجمه‌های اخیر حذف کنید."
 }

frontend/src/lib/i18n/messages/fr/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Rechercher dans les segments...",
   "reviews.shortcutHint": "Ctrl + Entrée pour enregistrer",
   "reviews.approvingProgress": "Approbation ({current}/{total})…",
-  "reviews.noMatchingSegments": "Aucun segment ne correspond à votre filtre."
+  "reviews.noMatchingSegments": "Aucun segment ne correspond à votre filtre.",
+  "reviews.empty.title": "Rien à relire pour ce travail",
+  "reviews.empty.desc": "Cette traduction n'a aucun segment enregistré : soit elle a échoué avant la traduction du texte, soit elle n'est plus conservée par le serveur. Vous pouvez la retirer de la liste des traductions récentes."
 }

frontend/src/lib/i18n/messages/fr/translate.json

@@ -96,6 +96,8 @@
   "translate.downloadFailed": "Le téléchargement a échoué. Réessayez.",
   "translate.recent.title": "Traductions récentes",
   "translate.recent.review": "Relire",
+  "translate.recent.remove": "Retirer de l'historique",
+  "translate.recent.removeConfirm": "Cliquez encore pour confirmer",
   "translate.upload.ariaDropzone": "Déposer un document : glisser-déposer ou appuyer sur Entrée pour parcourir",
   "translate.cancelAction": "Annuler la traduction",
   "translate.cancelledTitle": "Traduction annulée",

frontend/src/lib/i18n/messages/it/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "Niente da rivedere per questo lavoro",
+  "reviews.empty.desc": "Questa traduzione non ha segmenti salvati: o è fallita prima di tradurre il testo, o il server non la conserva più. Puoi rimuoverla dall'elenco delle traduzioni recenti."
 }

frontend/src/lib/i18n/messages/ja/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "このジョブに校正するセグメントはありません",
+  "reviews.empty.desc": "この翻訳には保存されたセグメントがありません。テキストの翻訳前に失敗したか、サーバーに保持されていません。最近の翻訳リストから削除できます。"
 }

frontend/src/lib/i18n/messages/ko/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "이 작업에 검토할 세그먼트가 없습니다",
+  "reviews.empty.desc": "이 번역에는 저장된 세그먼트가 없습니다. 텍스트 번역 전에 실패했거나 서버에 더 이상 보관되지 않습니다. 최근 번역 목록에서 제거할 수 있습니다."
 }

frontend/src/lib/i18n/messages/nl/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "Niets te controleren voor deze opdracht",
+  "reviews.empty.desc": "Deze vertaling heeft geen opgeslagen segmenten: of hij mislukte voordat er tekst werd vertaald, of de server bewaart hem niet meer. U kunt hem verwijderen uit de lijst met recente vertalingen."
 }

frontend/src/lib/i18n/messages/pt/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "Nada a revisar neste trabalho",
+  "reviews.empty.desc": "Esta tradução não tem segmentos armazenados: ou falhou antes de qualquer texto ser traduzido, ou o servidor já não a conserva. Pode removê-la da lista de traduções recentes."
 }

frontend/src/lib/i18n/messages/ru/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "Для этого задания нет сегментов для проверки",
+  "reviews.empty.desc": "У этого перевода нет сохранённых сегментов: либо он завершился ошибкой до перевода текста, либо сервер его больше не хранит. Вы можете удалить его из списка недавних переводов."
 }

frontend/src/lib/i18n/messages/zh/reviews.json

@@ -47,5 +47,7 @@
   "reviews.searchPlaceholder": "Search in segments...",
   "reviews.shortcutHint": "Ctrl + Enter to save",
   "reviews.approvingProgress": "Approving ({current}/{total})…",
-  "reviews.noMatchingSegments": "No segments match your filter."
+  "reviews.noMatchingSegments": "No segments match your filter.",
+  "reviews.empty.title": "此任务没有可校对的段落",
+  "reviews.empty.desc": "此翻译没有已存储的段落：可能是在翻译文本之前失败，或服务器已不再保留。您可以将其从最近翻译列表中移除。"
 }