UI: Cyber/IT design overhaul with semantic status tokens (Material 3)

Re-theme TasQ with a refined enterprise "Cyber/IT" identity on Material 3.
Functionality is unchanged — only color/shape tokens and a few state widgets.

Foundation:
- Hand-tuned light + dark ColorSchemes (deep-slate surfaces, azure/teal/violet
  accents), tightened 12-16dp shape language, flat hairline-outlined cards.
- New AppStatusColors theme extension (success/warning/danger/info/neutral,
  per-brightness) replacing scattered raw Colors.green/orange/red/grey so status
  color is consistent and legible in dark mode.
- New TechChip mono primitive; StatusPill.kind; M3Card hairline variants;
  tightened AppSurfaces radii.

Per-screen:
- Tokenized status colors + radii across dashboard, tickets, tasks, IT service
  requests, attendance, whereabouts, network map, reports charts, auth, and
  shared/admin screens. Added _ticketStatusKind/_taskStatusKind/_isrStatusKind
  mappers so status carries meaning consistently.
- Fixed white pie-slice borders for dark mode; dropped ad-hoc dialog radius
  overrides in favor of the theme default. Categorical palettes (leave-type
  icons, team color picker, distribution charts) intentionally preserved.

Verified: flutter analyze lib clean; flutter build web green; visual QA in
light and dark (dashboard, tickets, attendance).

Co-Authored-By: claude-flow <ruv@ruv.net>

lib/screens/shared/mobile_verification_screen.dart

@@ -3,6 +3,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../providers/verification_session_provider.dart';
 import '../../services/face_verification.dart' as face;
+import '../../theme/app_status_colors.dart';
 
 /// Screen opened on mobile when the user scans a QR code for cross-device
 /// face verification. Performs liveness detection and uploads the result.
@@ -144,7 +145,11 @@ class _MobileVerificationScreenState
       return Column(
         mainAxisSize: MainAxisSize.min,
         children: [
-          Icon(Icons.check_circle, size: 64, color: Colors.green),
+          Icon(
+            Icons.check_circle,
+            size: 64,
+            color: AppStatusColors.of(context).success.color,
+          ),
           const SizedBox(height: 16),
           Text('Verification Complete', style: theme.textTheme.headlineSmall),
           const SizedBox(height: 8),