i18n(wallets): clarify never-opened wallet label ("Never" -> "Never opened")

Standalone "Never" in the wallet list's last-opened slot was ambiguous; make it
"Never opened" (and update all eight translations). Glyphs already covered by the
CJK subset, so no font rebuild needed.

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

res/lang/zh.json

@@ -1353,7 +1353,7 @@
     "wallets_imported": "钱包已导入——正在切换…",
     "wallets_intro": "位于您数据目录（以及您添加的任何文件夹）中的钱包文件。打开一个即可切换——节点将重启以加载它，且每个钱包各自保留其数据。",
     "wallets_name_invalid": "请输入有效的钱包名称。",
-    "wallets_never": "从未",
+    "wallets_never": "从未打开",
     "wallets_new_hint": "名称（例如 savings）",
     "wallets_new_label": "创建新钱包：",
     "wallets_open": "打开",