feat: zashi zkool sweep, and minor fixes (#2838)

feat: restore from keys zcash
fix: don't display empty keys

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

@@ -333,6 +333,36 @@ 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/images/zec_icon.png',
+                      leftButtonAction: () => _dismissZcash(context),
+                      rightButtonAction: () => _rescanInternalChangeZcash(context),
+                      hintWidget: GestureDetector(
+                        behavior: HitTestBehavior.opaque,
+                        onTap: () => launchUrl(
+                          Uri.parse("https://docs.cakewallet.com/tutorials/zashi/#creating-a-new-zcash-wallet-on-cake"),
+                          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),
@@ -462,6 +492,22 @@ 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>(
@@ -476,4 +522,18 @@ 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/restore/wallet_restore_from_keys_form.dart

@@ -232,14 +232,26 @@ class WalletRestoreFromKeysFormState extends State<WalletRestoreFromKeysForm> {
 
       bool nanoBased = widget.walletRestoreViewModel.type == WalletType.nano ||
           widget.walletRestoreViewModel.type == WalletType.banano;
-      return AddressTextField(
-        addressKey: ValueKey('wallet_restore_from_key_private_key_textfield_key'),
-        controller: privateKeyController,
-        placeholder: nanoBased ? S.of(context).seed_hex_form : S.of(context).private_key,
-        options: [AddressTextFieldOption.paste],
-        onPushPasteButton: (_) {
-          _pasteText();
-        },
+      return Column(
+        children: [
+          AddressTextField(
+            addressKey: ValueKey('wallet_restore_from_key_private_key_textfield_key'),
+            controller: privateKeyController,
+            placeholder: nanoBased ? S.of(context).seed_hex_form : S.of(context).private_key,
+            options: [AddressTextFieldOption.paste],
+            onPushPasteButton: (_) {
+              _pasteText();
+            },
+          ),
+          if (widget.walletRestoreViewModel.hasBlockchainHeightSelector)
+            BlockchainHeightWidget(
+              key: blockchainHeightKey,
+              hasDatePicker: widget.walletRestoreViewModel.type != WalletType.haven,
+              onHeightChange: (_) => null,
+              onHeightOrDateEntered: widget.onHeightOrDateEntered,
+              walletType: widget.walletRestoreViewModel.type,
+            ),
+        ]
       );
     }
 

lib/src/screens/settings/display_settings_page.dart

@@ -50,6 +50,13 @@ class DisplaySettingsPage extends BasePage {
                   _displaySettingsViewModel.setShowAddressBookPopup(value);
                 },
               ),
+              SettingsSwitcherCell(
+                title: S.of(context).show_zcash_card,
+                value: _displaySettingsViewModel.showZcashCard,
+                onValueChange: (_, bool value) {
+                  _displaySettingsViewModel.setShowZcashCard(value);
+                },
+              ),
               SettingsPickerCell<SyncStatusDisplayMode>(
                 title: S.current.sync_status_display_mode,
                 items: SyncStatusDisplayMode.values.toList(),