fix(voices): #1219 review — close the /use dedup race + generic materialize error

- /archetypes/{id}/use: re-check the personality row inside the write connection
  right before INSERT (the pre-render SELECT could race a concurrent /use of the
  same archetype). Reuse the winner's row and drop the just-rendered sample. A
  UNIQUE index isn't viable — marketplace/persona imports reuse the personality
  column — so this closes the realistic single-user window (greptile P2).
- VoiceSelector: log the raw materialize error to the console and show a generic,
  actionable localized message instead of interpolating backend detail; drop the
  {{message}} placeholder from voiceSelector.addVoiceFailed across all 21 locales
  (CodeRabbit).

backend/api/routers/archetypes.py

@@ -341,6 +341,21 @@ async def use_archetype(archetype_id: str, name: Optional[str] = Query(None)):
     profile_name = (name or a["name"]).strip() or a["name"]
     try:
         with db_conn() as conn:
+            # Re-check under the write connection right before inserting: a
+            # concurrent /use for the same archetype may have inserted while we
+            # were rendering (the pre-render SELECT above raced). Reuse that row
+            # and drop our just-rendered sample instead of creating a duplicate.
+            # (personality is NOT globally unique — marketplace/persona imports
+            # reuse the column — so a UNIQUE index isn't an option; this closes
+            # the realistic window for the single-user desktop app.)
+            dup = conn.execute(
+                "SELECT id, name FROM voice_profiles WHERE personality = ? LIMIT 1",
+                (a["id"],),
+            ).fetchone()
+            if dup is not None:
+                with __import__("contextlib").suppress(OSError):
+                    os.remove(audio_path)
+                return {"profile_id": dup["id"], "name": dup["name"]}
             conn.execute(
                 "INSERT INTO voice_profiles "
                 "(id, name, ref_audio_path, ref_text, instruct, language, seed, personality, created_at) "

frontend/src/components/VoiceSelector.jsx

@@ -252,8 +252,10 @@ export default function VoiceSelector({
         setJustMaterialized({ id: r.profile_id, name: r.name });
         onChange?.(r.profile_id);
       } catch (e) {
-        // Keep the previous value; just tell the user it didn't take.
-        toast.error(t('voiceSelector.addVoiceFailed', { message: e?.message || String(e) }));
+        // Keep the previous value; tell the user it didn't take with an
+        // actionable, non-technical message (the raw error goes to the console).
+        console.error('[VoiceSelector] failed to add gallery voice', e);
+        toast.error(t('voiceSelector.addVoiceFailed'));
       } finally {
         setMaterializing(false);
       }

frontend/src/i18n/locales/ar.json

@@ -2229,7 +2229,7 @@
     "createVoice": "إنشاء صوت جديد",
     "gallery": "المعرض",
     "addingVoice": "جارٍ إضافة الصوت…",
-    "addVoiceFailed": "تعذّرت إضافة هذا الصوت: {{message}}"
+    "addVoiceFailed": "تعذّرت إضافة هذا الصوت"
   },
   "remote_gate": {
     "title": "أدخل رقم التعريف الشخصي للوصول",

frontend/src/i18n/locales/de.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Erstellen Sie eine neue Stimme",
     "gallery": "Galerie",
     "addingVoice": "Stimme wird hinzugefügt…",
-    "addVoiceFailed": "Diese Stimme konnte nicht hinzugefügt werden: {{message}}"
+    "addVoiceFailed": "Diese Stimme konnte nicht hinzugefügt werden"
   },
   "remote_gate": {
     "title": "Zugangs-PIN eingeben",

frontend/src/i18n/locales/en.json

@@ -2513,7 +2513,7 @@
     "createVoice": "Create a new voice",
     "gallery": "Gallery",
     "addingVoice": "Adding voice…",
-    "addVoiceFailed": "Couldn't add that voice: {{message}}"
+    "addVoiceFailed": "Couldn't add that voice — please try again."
   },
   "sharing": {
     "title": "Sharing & Remote Access",

frontend/src/i18n/locales/es.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Crea una nueva voz",
     "gallery": "Galería",
     "addingVoice": "Añadiendo voz…",
-    "addVoiceFailed": "No se pudo añadir esa voz: {{message}}"
+    "addVoiceFailed": "No se pudo añadir esa voz"
   },
   "remote_gate": {
     "title": "Introduce el PIN de acceso",

frontend/src/i18n/locales/fr.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Créer une nouvelle voix",
     "gallery": "Galerie",
     "addingVoice": "Ajout de la voix…",
-    "addVoiceFailed": "Impossible d'ajouter cette voix : {{message}}"
+    "addVoiceFailed": "Impossible d'ajouter cette voix"
   },
   "remote_gate": {
     "title": "Saisir le code PIN d'accès",

frontend/src/i18n/locales/hi.json

@@ -2229,7 +2229,7 @@
     "createVoice": "एक नई आवाज बनाएं",
     "gallery": "गैलरी",
     "addingVoice": "आवाज़ जोड़ी जा रही है…",
-    "addVoiceFailed": "वह आवाज़ नहीं जोड़ी जा सकी: {{message}}"
+    "addVoiceFailed": "वह आवाज़ नहीं जोड़ी जा सकी"
   },
   "remote_gate": {
     "title": "एक्सेस पिन दर्ज करें",

frontend/src/i18n/locales/id.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Ciptakan suara baru",
     "gallery": "Galeri",
     "addingVoice": "Menambahkan suara…",
-    "addVoiceFailed": "Tidak dapat menambahkan suara itu: {{message}}"
+    "addVoiceFailed": "Tidak dapat menambahkan suara itu"
   },
   "remote_gate": {
     "title": "Masukkan PIN akses",

frontend/src/i18n/locales/it.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Crea una nuova voce",
     "gallery": "Galleria",
     "addingVoice": "Aggiunta voce…",
-    "addVoiceFailed": "Impossibile aggiungere quella voce: {{message}}"
+    "addVoiceFailed": "Impossibile aggiungere quella voce"
   },
   "remote_gate": {
     "title": "Inserisci il PIN di accesso",

frontend/src/i18n/locales/ja.json

@@ -2229,7 +2229,7 @@
     "createVoice": "新しい音声を作成する",
     "gallery": "ギャラリー",
     "addingVoice": "音声を追加中…",
-    "addVoiceFailed": "その音声を追加できませんでした: {{message}}"
+    "addVoiceFailed": "その音声を追加できませんでした"
   },
   "remote_gate": {
     "title": "アクセスPINを入力してください",

frontend/src/i18n/locales/ko.json

@@ -2229,7 +2229,7 @@
     "createVoice": "새 목소리 만들기",
     "gallery": "갤러리",
     "addingVoice": "음성 추가 중…",
-    "addVoiceFailed": "해당 음성을 추가할 수 없습니다: {{message}}"
+    "addVoiceFailed": "해당 음성을 추가할 수 없습니다"
   },
   "remote_gate": {
     "title": "액세스 PIN을 입력하세요.",

frontend/src/i18n/locales/nl.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Creëer een nieuwe stem",
     "gallery": "Galerij",
     "addingVoice": "Stem toevoegen…",
-    "addVoiceFailed": "Kon die stem niet toevoegen: {{message}}"
+    "addVoiceFailed": "Kon die stem niet toevoegen"
   },
   "remote_gate": {
     "title": "Voer de toegangspincode in",

frontend/src/i18n/locales/pl.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Utwórz nowy głos",
     "gallery": "Galeria",
     "addingVoice": "Dodawanie głosu…",
-    "addVoiceFailed": "Nie udało się dodać tego głosu: {{message}}"
+    "addVoiceFailed": "Nie udało się dodać tego głosu"
   },
   "remote_gate": {
     "title": "Wprowadź PIN dostępu",

frontend/src/i18n/locales/pt.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Crie uma nova voz",
     "gallery": "Galeria",
     "addingVoice": "Adicionando voz…",
-    "addVoiceFailed": "Não foi possível adicionar essa voz: {{message}}"
+    "addVoiceFailed": "Não foi possível adicionar essa voz"
   },
   "remote_gate": {
     "title": "Digite o PIN de acesso",

frontend/src/i18n/locales/ru.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Создать новый голос",
     "gallery": "Галерея",
     "addingVoice": "Добавление голоса…",
-    "addVoiceFailed": "Не удалось добавить этот голос: {{message}}"
+    "addVoiceFailed": "Не удалось добавить этот голос"
   },
   "remote_gate": {
     "title": "Введите PIN-код доступа",

frontend/src/i18n/locales/sv.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Skapa en ny röst",
     "gallery": "Galleri",
     "addingVoice": "Lägger till röst…",
-    "addVoiceFailed": "Kunde inte lägga till den rösten: {{message}}"
+    "addVoiceFailed": "Kunde inte lägga till den rösten"
   },
   "remote_gate": {
     "title": "Ange åtkomst-PIN",

frontend/src/i18n/locales/th.json

@@ -2229,7 +2229,7 @@
     "createVoice": "สร้างเสียงใหม่",
     "gallery": "แกลเลอรี",
     "addingVoice": "กำลังเพิ่มเสียง…",
-    "addVoiceFailed": "ไม่สามารถเพิ่มเสียงนั้นได้: {{message}}"
+    "addVoiceFailed": "ไม่สามารถเพิ่มเสียงนั้นได้"
   },
   "remote_gate": {
     "title": "ป้อน PIN การเข้าถึง",

frontend/src/i18n/locales/tr.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Yeni bir ses oluştur",
     "gallery": "Galeri",
     "addingVoice": "Ses ekleniyor…",
-    "addVoiceFailed": "Bu ses eklenemedi: {{message}}"
+    "addVoiceFailed": "Bu ses eklenemedi"
   },
   "remote_gate": {
     "title": "Erişim PIN'ini girin",

frontend/src/i18n/locales/uk.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Створіть новий голос",
     "gallery": "Галерея",
     "addingVoice": "Додавання голосу…",
-    "addVoiceFailed": "Не вдалося додати цей голос: {{message}}"
+    "addVoiceFailed": "Не вдалося додати цей голос"
   },
   "remote_gate": {
     "title": "Введіть PIN-код доступу",

frontend/src/i18n/locales/vi.json

@@ -2229,7 +2229,7 @@
     "createVoice": "Tạo một giọng nói mới",
     "gallery": "Thư viện",
     "addingVoice": "Đang thêm giọng nói…",
-    "addVoiceFailed": "Không thể thêm giọng nói đó: {{message}}"
+    "addVoiceFailed": "Không thể thêm giọng nói đó"
   },
   "remote_gate": {
     "title": "Nhập mã PIN truy cập",

frontend/src/i18n/locales/zh-CN.json

@@ -2236,7 +2236,7 @@
     "createVoice": "创建新声音",
     "gallery": "画廊",
     "addingVoice": "正在添加声音…",
-    "addVoiceFailed": "无法添加该声音：{{message}}"
+    "addVoiceFailed": "无法添加该声音"
   },
   "remote_gate": {
     "title": "输入访问 PIN 码",

frontend/src/i18n/locales/zh-TW.json

@@ -2229,7 +2229,7 @@
     "createVoice": "創造新聲音",
     "gallery": "圖庫",
     "addingVoice": "正在新增聲音…",
-    "addVoiceFailed": "無法新增該聲音：{{message}}"
+    "addVoiceFailed": "無法新增該聲音"
   },
   "remote_gate": {
     "title": "輸入訪問 PIN 碼",