Remove unused imports and update comments

lib/screens/portfolio/activate/select_coins_page.dart

@@ -1,30 +1,30 @@
 import 'dart:async';
 import 'dart:io';
 
-import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter/material.dart';
 import 'package:komodo_dex/model/coin_type.dart';
 import 'package:komodo_dex/packages/z_coin_activation/bloc/z_coin_activation_bloc.dart';
 import 'package:komodo_dex/packages/z_coin_activation/bloc/z_coin_activation_event.dart';
 import 'package:komodo_dex/packages/z_coin_activation/models/z_coin_activation_prefs.dart';
 import 'package:komodo_dex/packages/z_coin_activation/widgets/z_coin_status_list_tile.dart';
-
-import '../../../app_config/app_config.dart';
 import '../../../blocs/coins_bloc.dart';
 import '../../../blocs/dialog_bloc.dart';
 import '../../../blocs/settings_bloc.dart';
 import '../../../localizations.dart';
+import '../../../app_config/app_config.dart';
 import '../../../model/coin.dart';
-import '../../../widgets/custom_simple_dialog.dart';
-import '../../../widgets/primary_button.dart';
 import '../../authentification/lock_screen.dart';
 import '../../portfolio/activate/build_item_coin.dart';
 import '../../portfolio/activate/build_type_header.dart';
 import '../../portfolio/activate/search_filter.dart';
 import '../../portfolio/loading_coin.dart';
-import 'build_filter_coin.dart';
+import '../../../widgets/custom_simple_dialog.dart';
+import '../../../widgets/primary_button.dart';
 import 'build_selected_coins.dart';
 
+import 'build_filter_coin.dart';
+
 class SelectCoinsPage extends StatefulWidget {
   const SelectCoinsPage({this.autoSubmit, this.coinsToAutoSubmit});
 
@@ -164,11 +164,8 @@ class _SelectCoinsPageState extends State<SelectCoinsPage> {
       _listViewItems = _buildListView();
     });
 
-    // This is used to pre-select coins when the auto-submitting a ZHTLC coin
-    // activation request. This is because the ZHTLC activation process
-    // requires tSync piratedex mobilehe user to keep the app open for a long time, so we want to
-    // present the user with the ZHTLC activation request dialog as soon as
-    // the app opens.
+    // Auto-submitting through this page allows for the ZHTLC activation
+    // flow to be triggered.
     if (widget.autoSubmit && widget.coinsToAutoSubmit != null) {
       for (final Coin coin in widget.coinsToAutoSubmit) {
         coinsBloc.setCoinBeforeActivation(coin, true);

lib/screens/portfolio/coins_page.dart

@@ -11,7 +11,6 @@ import 'package:komodo_dex/packages/rebranding/rebranding_dialog.dart';
 import 'package:komodo_dex/packages/rebranding/rebranding_provider.dart';
 import 'package:komodo_dex/packages/z_coin_activation/bloc/z_coin_activation_bloc.dart';
 import 'package:komodo_dex/packages/z_coin_activation/bloc/z_coin_activation_state.dart';
-import 'package:komodo_dex/packages/z_coin_activation/models/z_coin_activation_prefs.dart';
 import 'package:komodo_dex/packages/z_coin_activation/widgets/z_coin_status_list_tile.dart';
 import 'package:komodo_dex/screens/portfolio/animated_asset_proportions_graph.dart';
 import 'package:komodo_dex/services/db/database.dart';
@@ -86,10 +85,11 @@ class _CoinsPageState extends State<CoinsPage> {
     super.initState();
   }
 
-  // This is a hack to show the add coin dialog on first launch
-  // This function should not be awaited or used in any other place
-  // ignore: avoid_void_async
+  /// This is a hack to auto-submit ZHTLC coins via AddCoinPage on first launch
+  /// to start the ZHTLC activation flow.
   void _showAddCoinsOnFirstLaunch() async {
+    // Known coins are not available immediately after app launch, so wait for
+    // them before mapping the ZHTLC coin abbreviation to the Coin.
     while (coinsBloc.knownCoins == null && mounted) {
       await Future<void>.delayed(const Duration(milliseconds: 100));
     }
@@ -101,7 +101,6 @@ class _CoinsPageState extends State<CoinsPage> {
     }
 
     final Set<String> coinsToActivate = appConfig.defaultZHTLCCoins.toSet();
-
     final Set<String> activeCoins = coinsBloc.coinBalance
         .map((CoinBalance coinBalance) => coinBalance.coin.abbr)
         .toSet();
@@ -114,7 +113,6 @@ class _CoinsPageState extends State<CoinsPage> {
 
     showAddCoinPage(context, true,
         autoSubmitCoins: coinsToActivate, autoSubmit: true);
-
     await Db.setDefaultZHLTCCoinActivated(true);
   }
 
@@ -300,41 +298,6 @@ class _CoinsPageState extends State<CoinsPage> {
       colors: colors,
     );
   }
-
-  /// Shows a confirmation dialog for each coin which requires special
-  /// activation.
-  ///
-  /// Currently this is only for ZHTLC coins because their activation can take
-  /// a long time and the user must keep the app open.
-  Future<bool> _confirmSpecialActivations() async {
-    final isDeviceSupported = await _devicePermitsIntensiveWork(context);
-    if (!isDeviceSupported) return false;
-
-    final zhtlcActivationPrefs =
-        await ZCoinStatusWidget.showConfirmationDialog(context);
-    if (zhtlcActivationPrefs == null) return false;
-
-    // enum SyncType { newTransactions, fullSync, specifiedDate } is in z_coin_status_list_tile.dart
-    // Use zhtlcActivationPrefs as { 'zhtlcSyncType': SyncType, 'zhtlcSyncStartDate': DateTime }
-    await saveZhtlcActivationPrefs(zhtlcActivationPrefs);
-
-    return true;
-  }
-
-  /// *NOT IMPLEMENTED*
-  ///
-  /// Checks if the device is capable of performing intensive work required
-  /// for certain coin activations. Shows a dialog if the device is not
-  /// capable.
-  ///
-  /// Returns true if the device is capable of performing intensive work.
-  /// Returns false after showing a dialog if the device is not capable.
-  Future<bool> _devicePermitsIntensiveWork(BuildContext context) async {
-    // TODO: Ensure user has sufficient battery life, storage space, and
-    // has battery saver disabled.
-
-    return true;
-  }
 }
 
 class LoadAsset extends StatefulWidget {