feat(wallet): confirm before stopping an adopted node to switch wallets

When switching wallets, the node the app would restart may be one this session
ADOPTED — a dragonxd already running at launch (left up by "keep node running",
or started by the user). Rather than stopping it silently (or the old dead-code
"stop any external dragonxd first" refusal), show a "Stop the running node?"
confirmation first; switching then stops it (RPC stop + wait for the port to
fully free) and relaunches on the selected wallet.

- switchToWallet(walletFile, stopDaemonConfirmed=false): when the node is adopted
  (externalDaemonDetected) and not yet confirmed, defer to the dialog and return.
- renderSwitchStopDaemonDialog(): BlurFloat overlay (house style) with a warning
  header; confirm re-enters switchToWallet(w, true); cancel/X aborts, node keeps
  running. Owned nodes (started this session) still restart silently.
- i18n (EN + 8 languages, additive) + CJK subset rebuild; modal-switch-stopnode
  sweep surface for visual review.

Gate/re-entrancy adversarially verified (no state leak; owned switches ungated;
prompt reappears on a reverted switch; dead-daemon-before-confirm handled).

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

res/lang/zh.json

@@ -1294,6 +1294,10 @@
     "sweep_to": "归集到：",
     "sweep_toggle": "归集到我的钱包（不保留密钥）",
     "sweep_tx": "交易：",
+    "switch_stopnode_body": "切换钱包会以所选钱包重启节点。正在运行的节点将被停止并以新钱包重新启动——如果你是特意让它保持运行的，它会自动重新启动。",
+    "switch_stopnode_confirm": "停止节点并切换",
+    "switch_stopnode_title": "停止正在运行的节点？",
+    "switch_stopnode_warn": "已有一个并非由此钱包启动的节点正在运行。",
     "syncing": "同步中...",
     "t_address": "T 地址",
     "t_addresses": "T 地址",