feat: enhance UI, branding assets, onboarding flow, and screen layouts

lib/screens/pay_screens.dart

@@ -12,22 +12,25 @@ import '../state/shifts_controller.dart';
 import '../widgets/collapsing_header.dart';
 import '../widgets/common.dart';
 import '../widgets/glass_segments.dart';
+import '../widgets/krow_wordmark.dart';
 
-enum PayRange { week, month, year, all }
+/// Declared in the order the segments are shown, which is the prototype's:
+/// All first, then narrowing.
+enum PayRange { all, week, month, year }
 
 extension on PayRange {
   String get label => switch (this) {
+    PayRange.all => 'All',
     PayRange.week => 'Week',
     PayRange.month => 'Month',
     PayRange.year => 'Year',
-    PayRange.all => 'All',
   };
 
   Duration get window => switch (this) {
+    PayRange.all => const Duration(days: 3650),
     PayRange.week => const Duration(days: 7),
     PayRange.month => const Duration(days: 30),
     PayRange.year => const Duration(days: 365),
-    PayRange.all => const Duration(days: 3650),
   };
 }
 
@@ -86,16 +89,10 @@ class _PayScreenState extends ConsumerState<PayScreen> {
                       expanded: Column(
                         crossAxisAlignment: CrossAxisAlignment.start,
                         children: [
-                          Text(
-                            'ESTIMATED GROSS PAY · PRE-TAX',
-                            style: TextStyle(
-                              fontSize: 9.5,
-                              letterSpacing: 1.5,
-                              fontWeight: FontWeight.w600,
-                              color: Colors.white.withValues(alpha: 0.5),
-                            ),
+                          const HeaderBrandLine(
+                            trailing: HeaderEyebrow('Gross pay · pre-tax'),
                           ),
-                          const SizedBox(height: 5),
+                          const SizedBox(height: 6),
                           Text(
                             Fmt.money(paid + pending),
                             style: const TextStyle(