Cw 973 in app gift card redemption flow plus UI (#2285)

* refactor: cleanup cake_pay folder

* refactor: add My Cards tab on the main screen

* ui: add user card item

* refactor: cakePay purchase flow

* feat: add user card info

* refactor: auth flow

* refactor: theme data

* revert

* Update qr_widget.dart

* fix: update with new themes

* minor fixes

* feat: put redemption flow under a feature flag

* feat: implement simulated purchasing flow in debug mode

* feat: support LTC and MWEB payments

* Update savings_page.dart

* fix: UI fixes

* add Cake Pay transaction sent bottom sheet

* localization

* Update cake_pay_buy_card_page.dart

* addressing review comments

* fix marge conflicts

lib/view_model/send/output.dart

@@ -335,3 +335,29 @@ abstract class OutputBase with Store {
     note = parsedAddress.description;
   }
 }
+
+extension OutputCopyWith on Output {
+  Output OutputCopyWithParsedAddress({
+    ParsedAddress? parsedAddress,
+    String? fiatAmount,
+  }) {
+    final clone = Output(
+      _wallet,
+      _settingsStore,
+      _fiatConversationStore,
+      cryptoCurrencyHandler,
+    );
+
+    clone
+      ..cryptoAmount      = cryptoAmount
+      ..cryptoFullBalance = cryptoFullBalance
+      ..note              = note
+      ..sendAll           = sendAll
+      ..memo              = memo
+      ..stealthAddress    = stealthAddress
+      ..parsedAddress    = parsedAddress ?? this.parsedAddress
+      ..fiatAmount      = fiatAmount ?? this.fiatAmount;
+
+    return clone;
+  }
+}