feat(wallet): richer detail in the wallet-switch progress modal

The switch modal now shows more than a bare phase line:
- The title carries the target wallet ("Switching wallet — savings") and a
  "from <previous>" caption for context (names prettified: wallet.dat → "Default
  wallet", wallet-<name>.dat → "<name>", in-place links → "External wallet").
- During the Reconnecting phase — the ~30-60s where the node loads the block
  index, verifies, and rescans — it surfaces the node's LIVE init stage
  (state_.warmup_status/description via the existing translateWarmup mapping:
  "Loading blockchain data…", "Verifying blockchain…", "Scanning for
  transactions…") instead of a static "Reconnecting…".
- An elapsed timer (m:ss) so the wait visibly progresses.

i18n: from/elapsed/default-wallet/external-wallet labels (EN + 8 languages,
additive; no new CJK glyphs). No switch-flow logic change.

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

src/app_network.cpp

@@ -1113,6 +1113,7 @@ void App::switchToWallet(const std::string& walletFile, bool stopDaemonConfirmed
     // Open the switch progress modal — it stays up through stop → wait-for-exit → start → reconnect and
     // auto-closes when the new node connects (onConnected). The worker advances the phase from here.
     wallet_switch_error_.clear();
+    wallet_switch_started_time_ = 0.0;   // re-captured on the first progress frame → elapsed starts fresh
     wallet_switch_phase_.store(static_cast<int>(WalletSwitchPhase::Stopping));
     wallet_switch_dialog_open_.store(true);