Fix orphan references after shitcoin nuke (build round 2)

Stragglers that weren't in any agent's batch but referenced the removed
identifiers:

- tool/configure.dart: stripped 'backupSeeds(Box<HavenSeedStore>)'
  abstract method from generateWownero's emitted template + the
  haven_seed_store.dart import. CI regenerates lib/wownero/wownero.dart
  from this template each build, so the previous lib/wownero/wownero.dart
  cleanup got reverted on rebuild. This is the actual fix.
- lib/core/trade_monitor.dart + lib/view_model/trade_details_view_model.dart:
  removed JupiterExchangeProvider import + ExchangeProviderDescription.jupiter
  switch cases (provider + URL builder).
- lib/src/screens/dashboard/dashboard_page.dart: deleted _showHavenPopup
  helper + its call site + the haven_wallet_removal_popup import.
- lib/src/widgets/haven_wallet_removal_popup.dart: deleted (no callers).
- lib/src/screens/dashboard/pages/balance/crypto_balance_widget.dart:
  removed the zcash 'missing funds' InfoCard and the decred 'syncing'
  InfoCard widgets, plus their _dismissZcash and _rescanInternalChangeZcash
  handlers.
- lib/src/screens/settings/connection_sync_page.dart: removed the TronGrid
  history toggle row.
- lib/src/widgets/bottom_sheet/payment_confirmation_bottom_sheet.dart:
  _isTokenSelectionFlow now only checks evmNetworkSelection (was also
  branching on solana/tronTokenSelection enum values that no longer exist).

Generated .g.dart files for dashboard_view_model and connection_sync_view_model
still reference removed methods (rescanInternalChangeZcash, dismissZcash,
canUseTronGrid, setUseTronGrid). Those will be regenerated by build_runner
on next CI run and the methods will fall out — no manual fix needed.

lib/src/screens/dashboard/dashboard_page.dart

@@ -9,7 +9,6 @@ import 'package:hash_wallet/src/screens/wallet_connect/widgets/bottom_sheet/bott
 import 'package:hash_wallet/src/screens/wallet_connect/services/bottom_sheet_service.dart';
 import 'package:hash_wallet/src/widgets/evm_switcher.dart';
 import 'package:hash_wallet/src/widgets/gradient_background.dart';
-import 'package:hash_wallet/src/widgets/haven_wallet_removal_popup.dart';
 import 'package:hash_wallet/src/widgets/services_updates_widget.dart';
 import 'package:hash_wallet/src/widgets/vulnerable_seeds_popup.dart';
 import 'package:hash_wallet/utils/device_info.dart';
@@ -346,8 +345,6 @@ class _DashboardPageView extends BasePage {
 
     _showVulnerableSeedsPopup(context);
 
-    _showHavenPopup(context);
-
     var needToPresentYat = false;
 
     rootKey.currentState?.isInactive.listen(
@@ -423,21 +420,4 @@ class _DashboardPageView extends BasePage {
     }
   }
 
-  void _showHavenPopup(BuildContext context) async {
-    final List<String> havenWalletList = await dashboardViewModel.checkForHavenWallets();
-
-    if (havenWalletList.isNotEmpty) {
-      Future<void>.delayed(
-        Duration(seconds: 1),
-        () {
-          showPopUp<void>(
-            context: context,
-            builder: (BuildContext context) {
-              return HavenWalletRemovalPopup(havenWalletList);
-            },
-          );
-        },
-      );
-    }
-  }
 }

lib/src/screens/dashboard/pages/balance/crypto_balance_widget.dart

@@ -333,52 +333,6 @@ class CryptoBalanceWidget extends StatelessWidget {
                       ),
                     ),
                   ),
-                ],
-                 if (dashboardViewModel.showZcashMissingFundsCard) ...[
-                  SizedBox(height: 10),
-                  Padding(
-                    padding: const EdgeInsets.fromLTRB(16, 0, 16, 8),
-                    child: InfoCard(
-                      title: S.of(context).zcash_card_missing_funds,
-                      description: S.of(context).zcash_card_description,
-                      leftButtonTitle: S.of(context).zcash_card_dismiss,
-                      rightButtonTitle: S.of(context).zcash_card_scan,
-                      image: 'assets/new-ui/crypto_full_icons/zcash.svg',
-                      leftButtonAction: () => _dismissZcash(context),
-                      rightButtonAction: () => _rescanInternalChangeZcash(context),
-                      hintWidget: GestureDetector(
-                        behavior: HitTestBehavior.opaque,
-                        onTap: () => launchUrl(
-                          Uri.parse("https://github.com/Such-Software/hash-wallet"),
-                          mode: LaunchMode.externalApplication,
-                        ),
-                        child: Text(
-                          S.of(context).learn_more,
-                          style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                                color: Theme.of(context).colorScheme.onSurfaceVariant,
-                                height: 1,
-                              ),
-                          softWrap: true,
-                        ),
-                      ),
-                    ),
-                  ),
-                ],
-                if (dashboardViewModel.showDecredInfoCard) ...[
-                  SizedBox(height: 10),
-                  Padding(
-                    padding: const EdgeInsets.fromLTRB(16, 0, 16, 8),
-                    child: InfoCard(
-                      title: S.of(context).synchronizing,
-                      description: S.of(context).decred_info_card_details,
-                      image: 'assets/images/crypto/decred.webp',
-                      leftButtonTitle: S.of(context).litecoin_mweb_dismiss,
-                      rightButtonTitle: S.of(context).learn_more,
-                      leftButtonAction: () => dashboardViewModel.dismissDecredInfoCard(),
-                      rightButtonAction: () => launchUrl(
-                          Uri.parse("https://github.com/Such-Software/hash-wallet")),
-                    ),
-                  ),
                 ],
                 if (dashboardViewModel.showPayjoinCard) ...[
                   SizedBox(height: 10),
@@ -492,22 +446,6 @@ class CryptoBalanceWidget extends StatelessWidget {
     }
     dashboardViewModel.setMwebEnabled();
   }
-  
-  Future<void> _rescanInternalChangeZcash(BuildContext context) async {
-    dashboardViewModel.rescanInternalChangeZcash();
-    await showPopUp<void>(
-      context: context,
-      builder: (BuildContext context) => AlertWithOneAction(
-        alertTitle: S.of(context).alert_notice,
-        alertContent: S.of(context).zcash_card_warning,
-        buttonText: S.of(context).understand,
-        buttonAction: () {
-          Navigator.of(context).pop();
-        },
-      ),
-    );
-  }
-  
 
   Future<void> _dismissMweb(BuildContext context) async {
     await showPopUp<void>(
@@ -522,18 +460,4 @@ class CryptoBalanceWidget extends StatelessWidget {
             ));
     dashboardViewModel.dismissMweb();
   }
-  
-  Future<void> _dismissZcash(BuildContext context) async {
-    await showPopUp<void>(
-        context: context,
-        builder: (BuildContext context) => AlertWithOneAction(
-              alertTitle: S.of(context).alert_notice,
-              alertContent: S.of(context).zcash_card_enable_later,
-              buttonText: S.of(context).understand,
-              buttonAction: () {
-                Navigator.of(context).pop();
-              },
-            ));
-    dashboardViewModel.dismissZcash();
-  }
 }

lib/src/screens/settings/connection_sync_page.dart

@@ -110,14 +110,6 @@ class ConnectionSyncPage extends BasePage {
                                 onChanged: (val) {
                                   _connectionSyncViewModel.setUseBscScan(val);
                                 }),
-                          if (_connectionSyncViewModel.canUseTronGrid)
-                            ListItemToggle(
-                                keyValue: "can_use_trongrid",
-                                label: S.of(context).trongrid_history,
-                                value: _connectionSyncViewModel.useTronGrid,
-                                onChanged: (val) {
-                                  _connectionSyncViewModel.setUseTronGrid(val);
-                                }),
                           if (_connectionSyncViewModel.canUseMempoolFeeAPI)
                             ListItemToggle(
                                 keyValue: "enable_mempool_api",