fix(pdf): le texte persan s'affichait en points d'interrogation

Cause racine (reproduite et verrouillee par test) : l'insertion PDF
demandait la police integree Helvetica tout en fournissant un fichier
de police — PyMuPDF ignore alors le fichier, et Helvetica n'a aucun
glyphe arabe : chaque lettre persane devenait un '?', et ces '?'
debordaient les boites d'origine (les nombreux « [translation
overflow] »). Defaut present dans toutes les versions deployees.

- le nom de police est desormais Personnalise quand un fichier de
  police est fourni : le fichier est reellement integre
- reproduction complete avant/apres : 0 '?', 0 debordement, persan
  rendu avec la police resolue
- test de non-regression : la page traduite ne contient PAS Helvetica
  et le texte extrait n'a aucun '?'
- bouton « Reconstruire » de la relecture : une infobulle explique
  desormais pourquoi il est grise (aucun segment approuve ni modifie),
  dans les 13 langues

frontend/src/app/dashboard/reviews/[jobId]/page.tsx

@@ -346,7 +346,16 @@ export default function ReviewPage() {
               if (f) importXliff(f);
             }}
           />
-          <Button size="sm" onClick={rebuild} disabled={isRebuilding || counts.approved + counts.edited === 0}>
+          <Button
+            size="sm"
+            onClick={rebuild}
+            disabled={isRebuilding || counts.approved + counts.edited === 0}
+            title={
+              counts.approved + counts.edited === 0
+                ? t('reviews.rebuildDisabledHint')
+                : undefined
+            }
+          >
             {isRebuilding ? <Loader2 className="size-3.5 animate-spin" /> : <Download className="size-3.5" />}
             {t('reviews.rebuild')}
           </Button>

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "وافق على جزء واحد على الأقل أو عدّله أولاً — تعيد إعادة البناء تطبيق مراجعتك."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Genehmigen oder bearbeiten Sie zuerst mindestens ein Segment — der Neuaufbau übernimmt Ihre Prüfung."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Approve or edit at least one segment first — the rebuild applies your reviewed wording."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Primero aprueba o edita al menos un segmento: la reconstrucción aplica tu revisión."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "ابتدا حداقل یک بخش را تأیید یا ویرایش کنید — بازسازی، بازبینی شما را اعمال می‌کند."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approbation ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Approuvez ou modifiez d'abord au moins un segment — la reconstruction applique votre relecture."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Prima approva o modifica almeno un segmento: la ricostruzione applica la tua revisione."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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。"
+  "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。",
+  "reviews.rebuildDisabledHint": "まず少なくとも1つのセグメントを承認または編集してください。再構築には校正内容が必要です。"
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "reviews.empty.desc": "이 번역에는 저장된 세그먼트가 없습니다. 텍스트 번역 전에 실패했거나 서버에 더 이상 보관되지 않습니다. 최근 번역 목록에서 제거할 수 있습니다.",
+  "reviews.rebuildDisabledHint": "먼저 세그먼트를 하나 이상 승인하거나 수정하세요 — 재구성에는 검토 내용이 필요합니다."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Keur eerst minstens één segment goed of bewerk het — de herbouw past uw controle toe."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Aprove ou edite primeiro pelo menos um segmento — a reconstrução aplica a sua revisão."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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."
+  "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.",
+  "reviews.rebuildDisabledHint": "Сначала утвердите или измените хотя бы один сегмент — пересборка применит вашу правку."
 }

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

@@ -49,5 +49,6 @@
   "reviews.approvingProgress": "Approving ({current}/{total})…",
   "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。"
+  "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。",
+  "reviews.rebuildDisabledHint": "请先批准或修改至少一个段落——重建会应用您的校对内容。"
 }

tests/test_translators/test_rtl_layout.py

@@ -1151,3 +1151,35 @@ class TestLtrNormalization:
         assert out_para is not None
         out_pPr = out_para._p.find(f"{{{A_NS}}}pPr")
         assert out_pPr is None or out_pPr.get("rtl") != "1"
+
+    @pytest.mark.skipif(_host_rtl_font() is None, reason="no Arabic-capable font on this host")
+    def test_layout_mode_uses_the_resolved_font_file(self, tmp_path):
+        """Regression guard: PyMuPDF ignores the fontfile when fontname is a
+        base-14 name ("helv") — every Persian/Arabic glyph used to render as
+        '?' in Helvetica, with mass "[translation overflow]" markers."""
+        import fitz
+
+        src = tmp_path / "src.pdf"
+        doc = fitz.open()
+        page = doc.new_page()
+        page.insert_textbox(
+            fitz.Rect(72, 72, 400, 96), "Bonjour le monde",
+            fontsize=11, fontname="helv",
+        )
+        doc.save(str(src))
+        doc.close()
+
+        translator = PDFTranslator(
+            provider=MockTranslationProvider({"Bonjour le monde": "سلام دنیا"})
+        )
+        out = tmp_path / "out.pdf"
+        translator.translate_file(src, out, "fa")
+
+        doc2 = fitz.open(str(out))
+        fonts = [f[3] for f in doc2[0].get_fonts()]
+        text = doc2[0].get_text()
+        doc2.close()
+
+        assert "Helvetica" not in fonts, fonts
+        assert "?" not in text
+        assert any(0xFB50 <= ord(c) <= 0xFEFF for c in text)

translators/pdf_translator.py

@@ -1065,15 +1065,15 @@ class PDFTranslator:
         color = self._int_to_rgb(block["color"])
         align = fitz.TEXT_ALIGN_RIGHT if rtl_target else fitz.TEXT_ALIGN_LEFT
 
-        # PyMuPDF bug: fontname=None raises AttributeError. Default to 'helv'.
+        # PyMuPDF: fontname must be a CUSTOM name when a fontfile is given —
-        # If a custom font file is available, use it via fontfile (fontname ignored).
+        # a base-14 name ("helv"…) makes the fontfile SILENTLY IGNORED and
-        # Base-14 font variant honouring the block's bold/italic flags —
+        # every non-Latin glyph renders as "?". This is exactly how Persian
-        # previously every block (headings included) rendered in regular.
+        # PDFs used to come out full of question marks.
-        # When a custom Unicode fontfile is used we keep it: we have no
+        # Without a font file, pick the base-14 variant honouring the
-        # bold/italic variant of that file, and glyph coverage matters more
+        # block's bold/italic flags. When a custom Unicode fontfile is used
-        # than weight.
+        # we keep one regular face: glyph coverage matters more than weight.
         if font_path:
-            fontname = "helv"
+            fontname = "wordly-unicode"
             fontfile = font_path
         else:
             fontname = (