fix: wownero P0s, fail-closed RNG, iOS scheme, dep pins

- resetToDefault omitted Wownero: the reset button null-crashed and left
  WOW wallets with an empty node list
- accountLabel was missing a return and rendered blank for WOW wallets
- sec_random now throws instead of returning empty bytes when the native
  entropy channel fails or under-delivers
- iOS builds no longer register the leftover cakewallet:// URL scheme
- WOW fee estimate now fetched from the connected daemon's
  get_fee_estimate RPC and cached; the inherited XMR constant table
  remains only as a pre-fetch fallback
- pin cake_backup, flutter_local_authentication, and bech32 git deps to
  their locked SHAs for reproducible builds

lib/entities/node_list.dart

@@ -82,6 +82,7 @@ Future<List<Node>> loadDefaultNanoPowNodes() async {
 }
 
 Future<void> resetToDefault(Box<Node> nodeSource) async {
+  final wowneroNodes = await loadDefaultNodes(WalletType.wownero);
   final moneroNodes = await loadDefaultNodes(WalletType.monero);
   final bitcoinElectrumServerList = await loadDefaultNodes(WalletType.bitcoin);
   final litecoinElectrumServerList = await loadDefaultNodes(WalletType.litecoin);
@@ -94,7 +95,8 @@ Future<void> resetToDefault(Box<Node> nodeSource) async {
   final arbitrumNodes = await loadDefaultNodes(WalletType.arbitrum);
   final bscNodes = await loadDefaultNodes(WalletType.bsc);
 
-  final nodes = moneroNodes +
+  final nodes = wowneroNodes +
+      moneroNodes +
       bitcoinElectrumServerList +
       litecoinElectrumServerList +
       ethereumNodes +

lib/view_model/wallet_address_list/wallet_address_list_view_model.dart

@@ -389,7 +389,7 @@ abstract class WalletAddressListViewModelBase extends WalletChangeListenerViewMo
       case WalletType.monero:
         return monero!.getCurrentAccount(wallet).label;
       case WalletType.wownero:
-        wownero!.getCurrentAccount(wallet).label;
+        return wownero!.getCurrentAccount(wallet).label;
       default:
         return '';
     }