Refactor widgets & imports; add krow_domain

Add local krow_domain dependency to client, staff apps and client home package. Numerous UI/widget cleanups across features: add const where applicable, use explicit List<Widget> types and List<Widget>.generate, add super.key to constructors, tighten BlocProvider generics, replace some Containers with SizedBox, and simplify InputDecoration/Border constructors. Fix API error handler to return a const UnknownException. Update internal imports to package-style paths (staff_home, staff_payments, staff_main repository interface) and normalize Flutter imports (use material.dart). Add missing braces for early returns in tax form pages. Mostly formatting and small API/typing refactors with no behavioral changes intended.

apps/mobile/packages/features/client/settings/lib/src/presentation/pages/edit_profile_page.dart

@@ -10,7 +10,7 @@ class EditProfilePage extends StatefulWidget {
 }
 
 class _EditProfilePageState extends State<EditProfilePage> {
-  final _formKey = GlobalKey<FormState>();
+  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
   late TextEditingController _firstNameController;
   late TextEditingController _lastNameController;
   late TextEditingController _emailController;
@@ -50,11 +50,11 @@ class _EditProfilePageState extends State<EditProfilePage> {
           key: _formKey,
           child: Column(
             crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
+              children: <Widget>[
               Center(
                 child: Stack(
-                  children: [
-                    CircleAvatar(
+                    children: <Widget>[
+                      const CircleAvatar(
                       radius: 50,
                       backgroundColor: UiColors.bgSecondary,
                       child: const Icon(UiIcons.user, size: 40, color: UiColors.primary),

apps/mobile/packages/features/client/settings/lib/src/presentation/widgets/client_settings_page/settings_actions.dart

@@ -180,7 +180,7 @@ class _NotificationsSettingsCard extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return BlocBuilder<ClientSettingsBloc, ClientSettingsState>(
-      builder: (context, state) {
+      builder: (BuildContext context, ClientSettingsState state) {
         return Card(
           elevation: 0,
           shape: RoundedRectangleBorder(
@@ -202,7 +202,7 @@ class _NotificationsSettingsCard extends StatelessWidget {
                   icon: UiIcons.bell,
                   title: context.t.client_settings.preferences.push,
                   value: state.pushEnabled,
-                  onChanged: (val) =>
+                  onChanged: (bool val) =>
                       ReadContext(context).read<ClientSettingsBloc>().add(
                         ClientSettingsNotificationToggled(
                           type: 'push',
@@ -214,7 +214,7 @@ class _NotificationsSettingsCard extends StatelessWidget {
                   icon: UiIcons.mail,
                   title: context.t.client_settings.preferences.email,
                   value: state.emailEnabled,
-                  onChanged: (val) =>
+                  onChanged: (bool val) =>
                       ReadContext(context).read<ClientSettingsBloc>().add(
                         ClientSettingsNotificationToggled(
                           type: 'email',
@@ -226,7 +226,7 @@ class _NotificationsSettingsCard extends StatelessWidget {
                   icon: UiIcons.phone,
                   title: context.t.client_settings.preferences.sms,
                   value: state.smsEnabled,
-                  onChanged: (val) =>
+                  onChanged: (bool val) =>
                       ReadContext(context).read<ClientSettingsBloc>().add(
                         ClientSettingsNotificationToggled(
                           type: 'sms',
@@ -244,10 +244,6 @@ class _NotificationsSettingsCard extends StatelessWidget {
 }
 
 class _NotificationToggle extends StatelessWidget {
-  final IconData icon;
-  final String title;
-  final bool value;
-  final ValueChanged<bool> onChanged;
 
   const _NotificationToggle({
     required this.icon,
@@ -255,14 +251,18 @@ class _NotificationToggle extends StatelessWidget {
     required this.value,
     required this.onChanged,
   });
+  final IconData icon;
+  final String title;
+  final bool value;
+  final ValueChanged<bool> onChanged;
 
   @override
   Widget build(BuildContext context) {
     return Row(
       mainAxisAlignment: MainAxisAlignment.spaceBetween,
-      children: [
+      children: <Widget>[
         Row(
-          children: [
+          children: <Widget>[
             Icon(icon, size: 20, color: UiColors.iconSecondary),
             const SizedBox(width: UiConstants.space3),
             Text(title, style: UiTypography.footnote1m.textPrimary),