feat(market): explain why the portfolio Save button is disabled

Hovering the disabled Save button now shows which requirement is missing
(name / at least one address / a manual price above 0), mirroring the
send-tab disabled-submit tooltip idiom (IsItemHovered(AllowWhenDisabled)).
The hint only appears for a validation gap — not the self-evident "nothing
changed" case.

Adds portfolio_save_need_{name,address,price} to the English source and all
eight translations; rebuilds the CJK subset font for the new JA/KO/ZH glyphs.

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

res/lang/de.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "Aus Portfolio entfernen",
     "portfolio_revert": "Zurücksetzen",
     "portfolio_save": "Speichern",
+    "portfolio_save_need_address": "Fügen Sie mindestens eine Adresse hinzu, um zu speichern.",
+    "portfolio_save_need_name": "Geben Sie einen Namen ein, um diese Gruppe zu speichern.",
+    "portfolio_save_need_price": "Geben Sie einen manuellen Preis über 0 ein, um zu speichern.",
     "portfolio_search": "Adressen durchsuchen…",
     "portfolio_search_icons": "Symbole suchen…",
     "portfolio_select_all": "Alle",

res/lang/es.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "Quitar del portafolio",
     "portfolio_revert": "Revertir",
     "portfolio_save": "Guardar",
+    "portfolio_save_need_address": "Añade al menos una dirección para guardar.",
+    "portfolio_save_need_name": "Introduce un nombre para guardar este grupo.",
+    "portfolio_save_need_price": "Introduce un precio manual mayor que 0 para guardar.",
     "portfolio_search": "Buscar direcciones…",
     "portfolio_search_icons": "Buscar iconos…",
     "portfolio_select_all": "Todos",

res/lang/fr.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "Retirer du portefeuille d'actifs",
     "portfolio_revert": "Annuler",
     "portfolio_save": "Enregistrer",
+    "portfolio_save_need_address": "Ajoutez au moins une adresse pour enregistrer.",
+    "portfolio_save_need_name": "Saisissez un nom pour enregistrer ce groupe.",
+    "portfolio_save_need_price": "Saisissez un prix manuel supérieur à 0 pour enregistrer.",
     "portfolio_search": "Rechercher des adresses\\xE2\\x80\\xA6",
     "portfolio_search_icons": "Rechercher des icônes\\xE2\\x80\\xA6",
     "portfolio_select_all": "Tout",

res/lang/ja.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "ポートフォリオから削除",
     "portfolio_revert": "元に戻す",
     "portfolio_save": "保存",
+    "portfolio_save_need_address": "保存するにはアドレスを1つ以上追加してください。",
+    "portfolio_save_need_name": "このグループを保存するには名前を入力してください。",
+    "portfolio_save_need_price": "保存するには0より大きい手動価格を入力してください。",
     "portfolio_search": "アドレスを検索…",
     "portfolio_search_icons": "アイコンを検索…",
     "portfolio_select_all": "すべて",

res/lang/ko.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "포트폴리오에서 제거",
     "portfolio_revert": "되돌리기",
     "portfolio_save": "저장",
+    "portfolio_save_need_address": "저장하려면 주소를 하나 이상 추가하세요.",
+    "portfolio_save_need_name": "이 그룹을 저장하려면 이름을 입력하세요.",
+    "portfolio_save_need_price": "저장하려면 0보다 큰 수동 가격을 입력하세요.",
     "portfolio_search": "주소 검색…",
     "portfolio_search_icons": "아이콘 검색\\xE2\\x80\\xA6",
     "portfolio_select_all": "전체",

res/lang/pt.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "Remover do portfólio",
     "portfolio_revert": "Reverter",
     "portfolio_save": "Salvar",
+    "portfolio_save_need_address": "Adicione pelo menos um endereço para salvar.",
+    "portfolio_save_need_name": "Insira um nome para salvar este grupo.",
+    "portfolio_save_need_price": "Insira um preço manual acima de 0 para salvar.",
     "portfolio_search": "Pesquisar endereços…",
     "portfolio_search_icons": "Pesquisar ícones\\xE2\\x80\\xA6",
     "portfolio_select_all": "Todos",

res/lang/ru.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "Удалить из портфеля",
     "portfolio_revert": "Отменить изменения",
     "portfolio_save": "Сохранить",
+    "portfolio_save_need_address": "Добавьте хотя бы один адрес, чтобы сохранить.",
+    "portfolio_save_need_name": "Введите имя, чтобы сохранить эту группу.",
+    "portfolio_save_need_price": "Введите ручную цену больше 0, чтобы сохранить.",
     "portfolio_search": "Поиск адресов…",
     "portfolio_search_icons": "Поиск иконок…",
     "portfolio_select_all": "Все",

res/lang/zh.json

@@ -829,6 +829,9 @@
     "portfolio_remove_from": "从投资组合中移除",
     "portfolio_revert": "还原",
     "portfolio_save": "保存",
+    "portfolio_save_need_address": "添加至少一个地址以保存。",
+    "portfolio_save_need_name": "输入名称以保存此分组。",
+    "portfolio_save_need_price": "输入大于 0 的手动价格以保存。",
     "portfolio_search": "搜索地址…",
     "portfolio_search_icons": "搜索图标…",
     "portfolio_select_all": "全部",