chore: refactor UI consistency using design system tokens and remove LucideIcons

apps/mobile/packages/features/staff/profile/lib/src/presentation/pages/staff_profile_page.dart

@@ -82,7 +82,7 @@ class StaffProfilePage extends StatelessWidget {
             if (state.status == ProfileStatus.error) {
             return Center(
               child: Padding(
-                padding: const EdgeInsets.all(16.0),
+                padding: const EdgeInsets.all(UiConstants.space4),
                 child: Text(
                   state.errorMessage != null
                       ? translateErrorKey(state.errorMessage!)
@@ -112,7 +112,7 @@ class StaffProfilePage extends StatelessWidget {
                   onSignOutTap: () => _onSignOut(cubit, state),
                 ),
                 Transform.translate(
-                  offset: const Offset(0, -24),
+                  offset: const Offset(0, -UiConstants.space6),
                   child: Padding(
                     padding: const EdgeInsets.symmetric(
                       horizontal: UiConstants.space5,

apps/mobile/packages/features/staff/profile/lib/src/presentation/widgets/logout_button.dart

@@ -22,7 +22,7 @@ class LogoutButton extends StatelessWidget {
         border: Border.all(color: UiColors.border),
       ),
       child: Material(
-        color: const Color(0x00000000),
+        color: UiColors.transparent,
         child: InkWell(
           onTap: onTap,
           borderRadius: UiConstants.radiusLg,

apps/mobile/packages/features/staff/profile/lib/src/presentation/widgets/reliability_stats_card.dart

@@ -84,14 +84,14 @@ class ReliabilityStatsCard extends StatelessWidget {
       child: Column(
         children: [
           Container(
-            width: 40,
-            height: 40,
+            width: UiConstants.space10,
+            height: UiConstants.space10,
             decoration: BoxDecoration(
               color: UiColors.primary.withValues(alpha: 0.1),
               borderRadius: BorderRadius.circular(UiConstants.radiusMdValue),
             ),
             alignment: Alignment.center,
-            child: Icon(icon, size: 20, color: UiColors.primary),
+            child: Icon(icon, size: UiConstants.iconMd, color: UiColors.primary),
           ),
           const SizedBox(height: UiConstants.space1),
           Text(

apps/mobile/packages/features/staff/profile/pubspec.yaml

@@ -15,7 +15,6 @@ dependencies:
   bloc: ^8.1.0
   flutter_modular: ^6.3.0
   equatable: ^2.0.5
-  lucide_icons: ^0.257.0
   
   # Architecture Packages
   design_system: