i18n(chat): translate the chat send/receive toasts into all 8 languages

The HushChat UI labels were already translated, but the send-path
notifications (not-connected, no-z-address, waiting-for-reply, compose
failures, contact-request queued, lite busy) were still hardcoded English.
Route all eight call sites in app_network.cpp through TR() with seven new
keys (the three "no z-address" variants unified into chat_toast_no_zaddr),
add the English fallbacks in i18n.cpp, and translate the keys into de/es/fr/
ja/ko/pt/ru/zh — reusing each file's existing chat_* terminology (z-address,
contact request, message) for consistency. Additive only (950 -> 957 keys
per language). CJK subset font rebuilt to cover the new zh/ja/ko glyphs.

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

res/lang/de.json

@@ -123,6 +123,13 @@
     "chat_select_hint": "Wähle eine Unterhaltung aus, um sie anzuzeigen.",
     "chat_send": "Senden",
     "chat_send_failed": "nicht gesendet",
+    "chat_toast_compose_failed": "Nachricht konnte nicht erstellt werden (zu lang?).",
+    "chat_toast_lite_busy": "Es wird bereits gesendet, oder es ist keine Wallet geöffnet.",
+    "chat_toast_no_zaddr": "Keine z-Adresse verfügbar, um den Chat zu senden.",
+    "chat_toast_not_connected": "Nicht verbunden – Nachricht nicht gesendet.",
+    "chat_toast_request_compose_failed": "Kontaktanfrage konnte nicht erstellt werden (ungültige Adresse / ungültiger Text?).",
+    "chat_toast_request_queued": "Kontaktanfrage in Warteschlange.",
+    "chat_toast_waiting_reply": "Warte auf die Antwort des Kontakts, bevor du ihm schreiben kannst.",
     "chat_waiting_reply": "Warte auf die Antwort dieses Kontakts – sobald er antwortet, kannst du ihm schreiben.",
     "chat_you": "Du",
     "choose_icon": "Symbol wählen",

res/lang/es.json

@@ -123,6 +123,13 @@
     "chat_select_hint": "Selecciona una conversación para verla.",
     "chat_send": "Enviar",
     "chat_send_failed": "no enviado",
+    "chat_toast_compose_failed": "No se pudo componer el mensaje (¿demasiado largo?).",
+    "chat_toast_lite_busy": "Ya hay un envío en curso, o no hay ningún monedero abierto.",
+    "chat_toast_no_zaddr": "No hay ninguna dirección z disponible desde la que enviar el chat.",
+    "chat_toast_not_connected": "Sin conexión: mensaje de chat no enviado.",
+    "chat_toast_request_compose_failed": "No se pudo componer la solicitud de contacto (¿dirección o texto no válidos?).",
+    "chat_toast_request_queued": "Solicitud de contacto en cola.",
+    "chat_toast_waiting_reply": "Espera a que este contacto responda antes de poder escribirle.",
     "chat_waiting_reply": "Esperando a que este contacto responda: podrás escribirle una vez lo haga.",
     "chat_you": "Tú",
     "choose_icon": "Elegir Icono",

res/lang/fr.json

@@ -123,6 +123,13 @@
     "chat_select_hint": "Sélectionnez une conversation pour l'afficher.",
     "chat_send": "Envoyer",
     "chat_send_failed": "non envoyé",
+    "chat_toast_compose_failed": "Impossible de composer le message (trop long ?).",
+    "chat_toast_lite_busy": "Un envoi est déjà en cours, ou aucun portefeuille n'est ouvert.",
+    "chat_toast_no_zaddr": "Aucune adresse Z disponible pour envoyer le message.",
+    "chat_toast_not_connected": "Non connecté — message non envoyé.",
+    "chat_toast_request_compose_failed": "Impossible de composer la demande de contact (adresse / texte invalide ?).",
+    "chat_toast_request_queued": "Demande de contact mise en file d'attente.",
+    "chat_toast_waiting_reply": "En attente de la réponse de ce contact avant de pouvoir lui écrire.",
     "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",

res/lang/ja.json

@@ -123,6 +123,13 @@
     "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_toast_compose_failed": "メッセージを作成できませんでした（長すぎませんか？）。",
+    "chat_toast_lite_busy": "すでに送信処理が進行中か、ウォレットが開かれていません。",
+    "chat_toast_no_zaddr": "送信元に使えるZアドレスがありません。",
+    "chat_toast_not_connected": "未接続 — チャットメッセージは送信されませんでした。",
+    "chat_toast_request_compose_failed": "連絡リクエストを作成できませんでした（アドレスまたはテキストが無効？）。",
+    "chat_toast_request_queued": "連絡リクエストを送信待ちに追加しました。",
+    "chat_toast_waiting_reply": "メッセージを送るには、この相手からの返信を待つ必要があります。",
     "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",

res/lang/ko.json

@@ -123,6 +123,13 @@
     "chat_select_hint": "볼 대화를 선택하세요.",
     "chat_send": "전송",
     "chat_send_failed": "전송 안 됨",
+    "chat_toast_compose_failed": "메시지를 작성할 수 없습니다 (너무 긴가요?).",
+    "chat_toast_lite_busy": "이미 전송이 진행 중이거나 열린 지갑이 없습니다.",
+    "chat_toast_no_zaddr": "채팅을 보낼 z-주소가 없습니다.",
+    "chat_toast_not_connected": "연결되지 않음 — 채팅 메시지가 전송되지 않았습니다.",
+    "chat_toast_request_compose_failed": "연락 요청을 작성할 수 없습니다 (잘못된 주소 / 텍스트?).",
+    "chat_toast_request_queued": "연락 요청이 대기열에 추가되었습니다.",
+    "chat_toast_waiting_reply": "상대방이 답장해야 메시지를 보낼 수 있습니다.",
     "chat_waiting_reply": "상대방의 답장을 기다리는 중입니다 — 답장하면 메시지를 보낼 수 있습니다.",
     "chat_you": "나",
     "choose_icon": "아이콘 선택",

res/lang/pt.json

@@ -123,6 +123,13 @@
     "chat_select_hint": "Selecione uma conversa para visualizá-la.",
     "chat_send": "Enviar",
     "chat_send_failed": "não enviada",
+    "chat_toast_compose_failed": "Não foi possível compor a mensagem (muito longa?).",
+    "chat_toast_lite_busy": "Já há um envio em andamento, ou nenhuma carteira está aberta.",
+    "chat_toast_no_zaddr": "Nenhum endereço-z disponível para enviar o chat.",
+    "chat_toast_not_connected": "Não conectado — mensagem de chat não enviada.",
+    "chat_toast_request_compose_failed": "Não foi possível compor a solicitação de contato (endereço / texto inválido?).",
+    "chat_toast_request_queued": "Solicitação de contato na fila.",
+    "chat_toast_waiting_reply": "Aguardando a resposta do contato antes que você possa enviar mensagens a ele.",
     "chat_waiting_reply": "Aguardando a resposta deste contato — você poderá enviar mensagens assim que ele responder.",
     "chat_you": "Você",
     "choose_icon": "Escolher Ícone",

res/lang/ru.json

@@ -123,6 +123,13 @@
     "chat_select_hint": "Выберите переписку для просмотра.",
     "chat_send": "Отправить",
     "chat_send_failed": "не отправлено",
+    "chat_toast_compose_failed": "Не удалось составить сообщение (слишком длинное?).",
+    "chat_toast_lite_busy": "Отправка уже выполняется, или кошелёк не открыт.",
+    "chat_toast_no_zaddr": "Нет доступного Z-адреса для отправки сообщений.",
+    "chat_toast_not_connected": "Нет подключения — сообщение не отправлено.",
+    "chat_toast_request_compose_failed": "Не удалось составить запрос контакта (неверный адрес / текст?).",
+    "chat_toast_request_queued": "Запрос контакта поставлен в очередь.",
+    "chat_toast_waiting_reply": "Ожидание ответа от контакта — вы сможете писать ему только после этого.",
     "chat_waiting_reply": "Ожидание ответа от контакта — вы сможете писать ему, как только он ответит.",
     "chat_you": "Вы",
     "choose_icon": "Выбрать иконку",

res/lang/zh.json

@@ -123,6 +123,13 @@
     "chat_select_hint": "选择一个对话以查看。",
     "chat_send": "发送",
     "chat_send_failed": "未发送",
+    "chat_toast_compose_failed": "无法编写该消息（内容过长？）。",
+    "chat_toast_lite_busy": "已有发送正在进行中，或未打开任何钱包。",
+    "chat_toast_no_zaddr": "没有可用于发送聊天的 z 地址。",
+    "chat_toast_not_connected": "未连接——聊天消息未发送。",
+    "chat_toast_request_compose_failed": "无法编写联系人请求（地址或文本无效？）。",
+    "chat_toast_request_queued": "联系人请求已排队。",
+    "chat_toast_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_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",

src/app_network.cpp

@@ -2543,12 +2543,12 @@ bool App::broadcastChatMemos(const chat::OutgoingChatMemos& memos)
     }
 
     if (!state_.connected || !rpc_ || !worker_) {
-        ui::Notifications::instance().error("Not connected — chat message not sent.");
+        ui::Notifications::instance().error(TR("chat_toast_not_connected"));
         return false;
     }
     const std::string from = chatReplyZaddr();  // spendable + advertised as the reply-to address
     if (from.empty()) {
-        ui::Notifications::instance().error("No spendable z-address to send chat from.");
+        ui::Notifications::instance().error(TR("chat_toast_no_zaddr"));
         return false;
     }
 
@@ -2588,7 +2588,7 @@ bool App::broadcastChatMemosLite(const chat::OutgoingChatMemos& memos)
         req.recipients.push_back(std::move(recipient));
     }
     if (!lite_wallet_->sendTransaction(req)) {
-        ui::Notifications::instance().error("A send is already in progress, or no wallet is open.");
+        ui::Notifications::instance().error(TR("chat_toast_lite_busy"));
         return false;
     }
     return true;
@@ -2607,19 +2607,19 @@ void App::sendChatMessage(const std::string& conversationId, const std::string&
         if (!m.peer_public_key_hex.empty()) peerPubKey = m.peer_public_key_hex;
     }
     if (peerPubKey.empty()) {
-        ui::Notifications::instance().info("Waiting for the contact to reply before you can message them.");
+        ui::Notifications::instance().info(TR("chat_toast_waiting_reply"));
         return;
     }
     const std::string myReply = chatReplyZaddr();
     if (myReply.empty()) {
-        ui::Notifications::instance().error("No z-address available to send chat from.");
+        ui::Notifications::instance().error(TR("chat_toast_no_zaddr"));
         return;
     }
 
     chat::OutgoingChatMemos memos;
     if (chat_service_.composeMessage(myReply, peerPubKey, peerZaddr, conversationId, text, memos)
         != chat::ChatComposeStatus::Ok) {
-        ui::Notifications::instance().error("Could not compose the message (too long?).");
+        ui::Notifications::instance().error(TR("chat_toast_compose_failed"));
         return;
     }
     const bool submitted = broadcastChatMemos(memos);
@@ -2644,7 +2644,7 @@ void App::startChatConversation(const std::string& peerZaddr, const std::string&
     if (peerZaddr.empty() || text.empty()) return;
     const std::string myReply = chatReplyZaddr();
     if (myReply.empty()) {
-        ui::Notifications::instance().error("No z-address available to send chat from.");
+        ui::Notifications::instance().error(TR("chat_toast_no_zaddr"));
         return;
     }
 
@@ -2652,7 +2652,7 @@ void App::startChatConversation(const std::string& peerZaddr, const std::string&
     chat::OutgoingChatMemos memos;
     if (chat_service_.composeContactRequest(myReply, peerZaddr, cid, text, memos)
         != chat::ChatComposeStatus::Ok) {
-        ui::Notifications::instance().error("Could not compose the contact request (invalid address / text?).");
+        ui::Notifications::instance().error(TR("chat_toast_request_compose_failed"));
         return;
     }
     const bool submitted = broadcastChatMemos(memos);
@@ -2668,7 +2668,7 @@ void App::startChatConversation(const std::string& peerZaddr, const std::string&
     echo.payload_position = 0;
     echo.delivery = submitted ? chat::ChatDelivery::Sent : chat::ChatDelivery::Failed;
     chat_service_.recordOutgoing(echo);
-    if (submitted) ui::Notifications::instance().success("Contact request queued.");
+    if (submitted) ui::Notifications::instance().success(TR("chat_toast_request_queued"));
 }
 
 // HushChat (lite variant): the full-node harvest works off z_viewtransaction, but the lite wallet's

src/util/i18n.cpp

@@ -226,6 +226,13 @@ void I18n::loadBuiltinEnglish()
         strings_["chat_new_message"] = "Message";
         strings_["chat_new_send"] = "Send request";
         strings_["chat_cancel"] = "Cancel";
+        strings_["chat_toast_not_connected"] = "Not connected — chat message not sent.";
+        strings_["chat_toast_no_zaddr"] = "No z-address available to send chat from.";
+        strings_["chat_toast_lite_busy"] = "A send is already in progress, or no wallet is open.";
+        strings_["chat_toast_waiting_reply"] = "Waiting for the contact to reply before you can message them.";
+        strings_["chat_toast_compose_failed"] = "Could not compose the message (too long?).";
+        strings_["chat_toast_request_compose_failed"] = "Could not compose the contact request (invalid address / text?).";
+        strings_["chat_toast_request_queued"] = "Contact request queued.";
         strings_["contacts_search_placeholder"] = "Search contacts...";
         strings_["contacts_search_no_match"] = "No matching contacts";
         strings_["address_book_confirm_delete"] = "Confirm delete?";