i18n(chat): translate the Chat UI strings into all 8 languages

Add the 15 HushChat UI strings (nav label, locked/empty/select/waiting hints,
composer + new-conversation dialog, You / contact request / not-sent tags) to
res/lang/{de,es,fr,ja,ko,pt,ru,zh}.json. Previously they fell back to English.

Added directly to the JSON files (935 -> 950 keys, additive only): the
scripts/gen_<lang>.py generators are stale — they emit ~285 fewer keys than the
committed JSONs, so regenerating from them would silently drop translations.
(Pre-existing issue; noted for follow-up. The generators are left untouched.)

Rebuilt the usage-based CJK subset font (res/fonts/NotoSansCJK-Subset.ttf) from
the full JSONs so the new chat glyphs (聊天 / 对话 / 会話 / 답장, etc.) render —
verified every CJK code point in the full JSONs is covered (no glyph regression).

Verified: Linux + Windows build (embedded lang headers regenerated via xxd, font
re-embedded via INCBIN), hygiene clean; per-file diff is additive (15 keys, 0
deletions).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

res/lang/de.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "Vorhandene Blockdaten (blocks, chainstate, notarizations) werden gelöscht und ersetzt. Ihre wallet.dat wird NICHT verändert oder gelöscht.",
     "cancel": "Abbrechen",
     "characters": "Zeichen",
+    "chat": "Chat",
+    "chat_cancel": "Abbrechen",
+    "chat_contact_request": "kontaktanfrage",
+    "chat_empty_hint": "Noch keine Unterhaltungen. Nachrichten, die du erhältst, erscheinen hier.",
+    "chat_locked_hint": "Entsperre deine Wallet, um deine Chats zu laden.",
+    "chat_new_button": "Neue Unterhaltung",
+    "chat_new_message": "Nachricht",
+    "chat_new_send": "Anfrage senden",
+    "chat_new_title": "Neue Unterhaltung",
+    "chat_new_zaddr": "z-Adresse des Empfängers",
+    "chat_select_hint": "Wähle eine Unterhaltung aus, um sie anzuzeigen.",
+    "chat_send": "Senden",
+    "chat_send_failed": "nicht gesendet",
+    "chat_waiting_reply": "Warte auf die Antwort dieses Kontakts – sobald er antwortet, kannst du ihm schreiben.",
+    "chat_you": "Du",
     "choose_icon": "Symbol wählen",
     "clear": "Leeren",
     "clear_all_bans": "Alle Sperren aufheben",

res/lang/es.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "Los datos de bloques existentes (blocks, chainstate, notarizations) se eliminarán y reemplazarán. Su wallet.dat NO será modificado ni eliminado.",
     "cancel": "Cancelar",
     "characters": "caracteres",
+    "chat": "Chat",
+    "chat_cancel": "Cancelar",
+    "chat_contact_request": "solicitud de contacto",
+    "chat_empty_hint": "Aún no hay conversaciones. Los mensajes que recibas aparecerán aquí.",
+    "chat_locked_hint": "Desbloquea tu monedero para cargar tus chats.",
+    "chat_new_button": "Nueva conversación",
+    "chat_new_message": "Mensaje",
+    "chat_new_send": "Enviar solicitud",
+    "chat_new_title": "Nueva conversación",
+    "chat_new_zaddr": "Dirección z del destinatario",
+    "chat_select_hint": "Selecciona una conversación para verla.",
+    "chat_send": "Enviar",
+    "chat_send_failed": "no enviado",
+    "chat_waiting_reply": "Esperando a que este contacto responda: podrás escribirle una vez lo haga.",
+    "chat_you": "Tú",
     "choose_icon": "Elegir Icono",
     "clear": "Limpiar",
     "clear_all_bans": "Limpiar Todos los Bloqueos",

res/lang/fr.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "Les données de blocs existantes (blocks, chainstate, notarizations) seront supprimées et remplacées. Votre wallet.dat ne sera PAS modifié ni supprimé.",
     "cancel": "Annuler",
     "characters": "caractères",
+    "chat": "Discussion",
+    "chat_cancel": "Annuler",
+    "chat_contact_request": "demande de contact",
+    "chat_empty_hint": "Aucune conversation pour l'instant. Les messages que vous recevez apparaîtront ici.",
+    "chat_locked_hint": "Déverrouillez votre portefeuille pour charger vos discussions.",
+    "chat_new_button": "Nouvelle conversation",
+    "chat_new_message": "Message",
+    "chat_new_send": "Envoyer la demande",
+    "chat_new_title": "Nouvelle conversation",
+    "chat_new_zaddr": "Adresse Z du destinataire",
+    "chat_select_hint": "Sélectionnez une conversation pour l'afficher.",
+    "chat_send": "Envoyer",
+    "chat_send_failed": "non envoyé",
+    "chat_waiting_reply": "En attente de la réponse de ce contact — vous pourrez lui écrire dès qu'il aura répondu.",
+    "chat_you": "Vous",
     "choose_icon": "Choisir une icône",
     "clear": "Effacer",
     "clear_all_bans": "Lever tous les bannissements",

res/lang/ja.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "既存のブロックデータ（blocks、chainstate、notarizations）は削除され置き換えられます。wallet.dat は変更・削除されません。",
     "cancel": "キャンセル",
     "characters": "文字",
+    "chat": "チャット",
+    "chat_cancel": "キャンセル",
+    "chat_contact_request": "連絡リクエスト",
+    "chat_empty_hint": "まだ会話はありません。受信したメッセージはここに表示されます。",
+    "chat_locked_hint": "チャットを読み込むにはウォレットのロックを解除してください。",
+    "chat_new_button": "新しい会話",
+    "chat_new_message": "メッセージ",
+    "chat_new_send": "リクエストを送信",
+    "chat_new_title": "新しい会話",
+    "chat_new_zaddr": "宛先Zアドレス",
+    "chat_select_hint": "表示する会話を選択してください。",
+    "chat_send": "送信",
+    "chat_send_failed": "未送信",
+    "chat_waiting_reply": "この相手からの返信を待っています — 返信があればメッセージを送れます。",
+    "chat_you": "自分",
     "choose_icon": "アイコンを選択",
     "clear": "クリア",
     "clear_all_bans": "すべてのブロックを解除",

res/lang/ko.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "기존 블록 데이터(blocks, chainstate, notarizations)가 삭제되고 교체됩니다. wallet.dat는 수정되거나 삭제되지 않습니다.",
     "cancel": "취소",
     "characters": "문자",
+    "chat": "채팅",
+    "chat_cancel": "취소",
+    "chat_contact_request": "연락 요청",
+    "chat_empty_hint": "아직 대화가 없습니다. 받은 메시지가 여기에 표시됩니다.",
+    "chat_locked_hint": "채팅을 불러오려면 지갑 잠금을 해제하세요.",
+    "chat_new_button": "새 대화",
+    "chat_new_message": "메시지",
+    "chat_new_send": "요청 보내기",
+    "chat_new_title": "새 대화",
+    "chat_new_zaddr": "받는 사람 z-주소",
+    "chat_select_hint": "볼 대화를 선택하세요.",
+    "chat_send": "전송",
+    "chat_send_failed": "전송 안 됨",
+    "chat_waiting_reply": "상대방의 답장을 기다리는 중입니다 — 답장하면 메시지를 보낼 수 있습니다.",
+    "chat_you": "나",
     "choose_icon": "아이콘 선택",
     "clear": "지우기",
     "clear_all_bans": "모든 차단 해제",

res/lang/pt.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "Os dados de blocos existentes (blocks, chainstate, notarizations) serão excluídos e substituídos. Seu wallet.dat NÃO será modificado ou excluído.",
     "cancel": "Cancelar",
     "characters": "caracteres",
+    "chat": "Chat",
+    "chat_cancel": "Cancelar",
+    "chat_contact_request": "solicitação de contato",
+    "chat_empty_hint": "Nenhuma conversa ainda. As mensagens que você receber aparecerão aqui.",
+    "chat_locked_hint": "Desbloqueie sua carteira para carregar suas conversas.",
+    "chat_new_button": "Nova conversa",
+    "chat_new_message": "Mensagem",
+    "chat_new_send": "Enviar solicitação",
+    "chat_new_title": "Nova conversa",
+    "chat_new_zaddr": "Endereço-z do destinatário",
+    "chat_select_hint": "Selecione uma conversa para visualizá-la.",
+    "chat_send": "Enviar",
+    "chat_send_failed": "não enviada",
+    "chat_waiting_reply": "Aguardando a resposta deste contato — você poderá enviar mensagens assim que ele responder.",
+    "chat_you": "Você",
     "choose_icon": "Escolher Ícone",
     "clear": "Limpar",
     "clear_all_bans": "Remover Todos os Banimentos",

res/lang/ru.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "Существующие данные блоков (blocks, chainstate, notarizations) будут удалены и заменены. Ваш wallet.dat НЕ будет изменён или удалён.",
     "cancel": "Отмена",
     "characters": "символов",
+    "chat": "Чат",
+    "chat_cancel": "Отмена",
+    "chat_contact_request": "запрос контакта",
+    "chat_empty_hint": "Пока нет переписок. Полученные сообщения появятся здесь.",
+    "chat_locked_hint": "Разблокируйте кошелёк, чтобы загрузить переписку.",
+    "chat_new_button": "Новая переписка",
+    "chat_new_message": "Сообщение",
+    "chat_new_send": "Отправить запрос",
+    "chat_new_title": "Новая переписка",
+    "chat_new_zaddr": "Z-адрес получателя",
+    "chat_select_hint": "Выберите переписку для просмотра.",
+    "chat_send": "Отправить",
+    "chat_send_failed": "не отправлено",
+    "chat_waiting_reply": "Ожидание ответа от контакта — вы сможете писать ему, как только он ответит.",
+    "chat_you": "Вы",
     "choose_icon": "Выбрать иконку",
     "clear": "Очистить",
     "clear_all_bans": "Снять все блокировки",

res/lang/zh.json

@@ -110,6 +110,21 @@
     "bootstrap_warning": "现有区块数据（blocks、chainstate、notarizations）将被删除并替换。您的 wallet.dat 不会被修改或删除。",
     "cancel": "取消",
     "characters": "字符",
+    "chat": "聊天",
+    "chat_cancel": "取消",
+    "chat_contact_request": "联系人请求",
+    "chat_empty_hint": "暂无对话。您收到的消息将显示在此处。",
+    "chat_locked_hint": "解锁钱包以加载您的聊天记录。",
+    "chat_new_button": "新建对话",
+    "chat_new_message": "消息",
+    "chat_new_send": "发送请求",
+    "chat_new_title": "新建对话",
+    "chat_new_zaddr": "收款方 z 地址",
+    "chat_select_hint": "选择一个对话以查看。",
+    "chat_send": "发送",
+    "chat_send_failed": "未发送",
+    "chat_waiting_reply": "等待该联系人回复——对方回复后您即可向其发送消息。",
+    "chat_you": "我",
     "choose_icon": "选择图标",
     "clear": "清除",
     "clear_all_bans": "解除所有封禁",