Refactor reliability statistics and score handling to support nullable values

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

@@ -105,15 +105,15 @@ class StaffProfilePage extends StatelessWidget {
                     child: Column(
                       children: [
                         ReliabilityStatsCard(
-                          totalShifts: profile.totalShifts ?? 0,
-                          averageRating: profile.averageRating ?? 0.0,
-                          onTimeRate: profile.onTimeRate ?? 0,
-                          noShowCount: profile.noShowCount ?? 0,
-                          cancellationCount: profile.cancellationCount ?? 0,
+                          totalShifts: profile.totalShifts,
+                          averageRating: profile.averageRating,
+                          onTimeRate: profile.onTimeRate,
+                          noShowCount: profile.noShowCount,
+                          cancellationCount: profile.cancellationCount,
                         ),
                         const SizedBox(height: UiConstants.space6),
                         ReliabilityScoreBar(
-                          reliabilityScore: profile.reliabilityScore ?? 100,
+                          reliabilityScore: profile.reliabilityScore,
                         ),
                         const SizedBox(height: UiConstants.space6),
                         SectionTitle(i18n.sections.onboarding),

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

@@ -6,17 +6,17 @@ import 'package:design_system/design_system.dart';
 ///
 /// Uses design system tokens for all colors, typography, and spacing.
 class ReliabilityScoreBar extends StatelessWidget {
-  final int reliabilityScore;
+  final int? reliabilityScore;
 
   const ReliabilityScoreBar({
     super.key,
-    required this.reliabilityScore,
+    this.reliabilityScore,
   });
 
   @override
   Widget build(BuildContext context) {
     final i18n = t.staff.profile.reliability_score;
-    final score = reliabilityScore / 100;
+    final score = (reliabilityScore ?? 0) / 100;
 
     return Container(
       padding: EdgeInsets.all(UiConstants.space4),
@@ -37,7 +37,7 @@ class ReliabilityScoreBar extends StatelessWidget {
                 ),
               ),
               Text(
-                "$reliabilityScore%",
+                "${reliabilityScore ?? 0}%",
                 style: UiTypography.headline4m.copyWith(
                   color: UiColors.primary,
                 ),

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

@@ -6,19 +6,19 @@ import 'package:design_system/design_system.dart';
 ///
 /// Uses design system tokens for all colors, typography, spacing, and icons.
 class ReliabilityStatsCard extends StatelessWidget {
-  final int totalShifts;
-  final double averageRating;
-  final int onTimeRate;
-  final int noShowCount;
-  final int cancellationCount;
+  final int? totalShifts;
+  final double? averageRating;
+  final int? onTimeRate;
+  final int? noShowCount;
+  final int? cancellationCount;
 
   const ReliabilityStatsCard({
     super.key,
-    required this.totalShifts,
-    required this.averageRating,
-    required this.onTimeRate,
-    required this.noShowCount,
-    required this.cancellationCount,
+    this.totalShifts,
+    this.averageRating,
+    this.onTimeRate,
+    this.noShowCount,
+    this.cancellationCount,
   });
 
   @override
@@ -43,31 +43,31 @@ class ReliabilityStatsCard extends StatelessWidget {
           _buildStatItem(
             context,
             LucideIcons.briefcase,
-            "$totalShifts",
+            "${totalShifts ?? 0}",
             "Shifts",
           ),
           _buildStatItem(
             context,
             LucideIcons.star,
-            averageRating.toStringAsFixed(1),
+            (averageRating ?? 0.0).toStringAsFixed(1),
             "Rating",
           ),
           _buildStatItem(
             context,
             LucideIcons.clock,
-            "$onTimeRate%",
+            "${onTimeRate ?? 0}%",
             "On Time",
           ),
           _buildStatItem(
             context,
             LucideIcons.xCircle,
-            "$noShowCount",
+            "${noShowCount ?? 0}",
             "No Shows",
           ),
           _buildStatItem(
             context,
             LucideIcons.ban,
-            "$cancellationCount",
+            "${cancellationCount ?? 0}",
             "Cancel.",
           ),
         ],