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>

src/app_network.cpp

@@ -1023,7 +1023,7 @@ void App::updateWalletIndexForActiveWallet(bool markOpened)
     if (wallet_index_.upsert(e)) wallet_index_.save();
 }
 
-void App::switchToWallet(const std::string& walletFile)
+void App::switchToWallet(const std::string& walletFile, bool stopDaemonConfirmed)
 {
     if (!supportsFullNodeLifecycleActions()) {
         ui::Notifications::instance().warning("Full-node lifecycle actions are unavailable in lite build");
@@ -1056,6 +1056,15 @@ void App::switchToWallet(const std::string& walletFile)
         ui::Notifications::instance().warning("Finish or cancel the pending send before switching wallets.");
         return;
     }
+    // The node we'd restart may be one this session ADOPTED — a dragonxd already running when the wallet
+    // launched (left running by "keep node running", or started by the user). Switching must stop+restart
+    // it on the new wallet, so confirm first rather than killing a node the user may have kept up on
+    // purpose. (An owned node we started this session restarts silently, as before.)
+    if (!stopDaemonConfirmed && daemon_controller_ && daemon_controller_->externalDaemonDetected()) {
+        pending_switch_wallet_file_ = walletFile;
+        show_switch_stop_daemon_confirm_ = true;
+        return;
+    }
 
     // Rescan only if this wallet was never synced in this datadir (freshly imported/new). One we've
     // loaded here before just catches up from its recorded block on start — fast.