fix(settings): disable the unimplemented Tor option and tell its users

The "Use Tor" checkbox was saved but never read: no build routed any
traffic (node, RPC, price/update/bootstrap/pool HTTP or Lite gRPC)
through Tor, so users who ticked it believed they were anonymous.

- The checkbox is disabled and always shown unticked, on the Settings
  page and in the legacy Settings window. Its tooltip says it is not
  available and gives the alternatives: for the node, proxy=127.0.0.1:9050
  in DRAGONX.conf with Tor running; otherwise a system-wide VPN/Tor (Lite
  builds get the short version). The "Use Tor" label is kept.
- Behaviour change: a stored use_tor=true is cleared once at startup
  (Settings::consumeLegacyUseTor + a synchronous save before the async
  writer and any Settings page state), with a 20 s warning in the user's
  language. The cleared key is the "already told" flag, so the notice
  never repeats. No settings format change.
- 3 new strings (tt_tor_unavailable, tt_tor_unavailable_lite,
  tor_never_applied_notice) in all 8 languages; the tooltip wraps at
  tor-tooltip-wrap-width from ui.toml.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

res/lang/zh.json

@@ -2019,6 +2019,7 @@
     "tools": "工具",
     "tools_actions": "工具与操作...",
     "tools_actions_hdr": "工具与操作",
+    "tor_never_applied_notice": "“使用 Tor”选项从未生效：您的连接并未通过 Tor 路由。该选项已关闭。其他方法请参阅设置中该选项的提示。",
     "total": "合计",
     "total_balance_label": "总余额",
     "transaction_id": "交易 ID",
@@ -2146,6 +2147,8 @@
     "tt_theme_effects": "每个主题的闪烁、发光、色调循环",
     "tt_theme_hotkey": "快捷键：Ctrl+左/右箭头切换主题",
     "tt_tor": "通过 Tor 网络路由守护进程连接以实现匿名",
+    "tt_tor_unavailable": "暂不可用：此钱包不会通过 Tor 路由任何流量。仅就节点而言，您可以在 DRAGONX.conf 中添加 proxy=127.0.0.1:9050 并重启节点。Tor 必须正在运行，否则节点将找不到其他节点。价格、更新、引导和矿池请求仍会直接连接；如需保护这些请求，请使用系统级 VPN/Tor。",
+    "tt_tor_unavailable_lite": "暂不可用：此钱包不会通过 Tor 路由任何流量。请使用系统级 VPN/Tor。",
     "tt_tx_url": "在区块浏览器中查看交易的基础 URL",
     "tt_ui_opacity": "卡片和侧边栏不透明度（100% = 完全不透明，越低越透明）",
     "tt_validate": "检查 DragonX 地址是否有效",