fixed warnings related to colors and deleted some commented code

lib/features/dashboard/widgets/account_card.dart

@@ -13,14 +13,6 @@ class AccountCard extends StatelessWidget {
       width: 300,
       padding: const EdgeInsets.all(20),
       decoration: BoxDecoration(
-        // gradient: LinearGradient(
-        //   begin: Alignment.topLeft,
-        //   end: Alignment.bottomRight,
-        //   colors: [
-        //     Theme.of(context).primaryColor,
-        //     Theme.of(context).primaryColor.withBlue(200),
-        //   ],
-        // ),
         color: Theme.of(context).primaryColor,
         borderRadius: BorderRadius.circular(12),
         boxShadow: [
@@ -58,7 +50,7 @@ class AccountCard extends StatelessWidget {
           Text(
             account.accountNumber,
             style: TextStyle(
-                color: Theme.of(context).dialogBackgroundColor, fontSize: 16),
+                color: const DialogThemeData().backgroundColor, fontSize: 16),
           ),
           const SizedBox(height: 30),
           Text(
@@ -73,7 +65,7 @@ class AccountCard extends StatelessWidget {
           Text(
             AppLocalizations.of(context).availableBalance,
             style: TextStyle(
-                color: Theme.of(context).dialogBackgroundColor, fontSize: 12),
+                color: const DialogThemeData().backgroundColor, fontSize: 16),
           ),
         ],
       ),