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/tasks/tasks_list_screen.dart

@@ -29,6 +29,7 @@ import '../../widgets/responsive_body.dart';
 import '../../widgets/tasq_adaptive_list.dart';
 import '../../widgets/typing_dots.dart';
 import '../../theme/app_surfaces.dart';
+import '../../theme/app_status_colors.dart';
 import '../../utils/snackbar.dart';
 import '../../widgets/app_breakpoints.dart';
 import '../../widgets/app_page_header.dart';
@@ -523,10 +524,10 @@ class _TasksListScreenState extends ConsumerState<TasksListScreen>
                             if (task.status == 'completed' &&
                                 task.hasIncompleteDetails) ...[
                               const SizedBox(width: 4),
-                              const Icon(
+                              Icon(
                                 Icons.warning_amber_rounded,
                                 size: 16,
-                                color: Colors.orange,
+                                color: AppStatusColors.of(context).warning.color,
                               ),
                             ],
                           ],
@@ -620,10 +621,10 @@ class _TasksListScreenState extends ConsumerState<TasksListScreen>
                                 if (task.status == 'completed' &&
                                     task.hasIncompleteDetails) ...[
                                   const SizedBox(width: 4),
-                                  const Icon(
+                                  Icon(
                                     Icons.warning_amber_rounded,
                                     size: 16,
-                                    color: Colors.orange,
+                                    color: AppStatusColors.of(context).warning.color,
                                   ),
                                 ],
                                 if (showTyping) ...[
@@ -1353,26 +1354,14 @@ class _StatusSummaryCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final scheme = Theme.of(context).colorScheme;
-    final background = switch (status) {
-      'critical' => scheme.errorContainer,
-      'queued' => scheme.surfaceContainerHighest,
-      'in_progress' => scheme.secondaryContainer,
-      'completed' => scheme.primaryContainer,
-      _ => scheme.surfaceContainerHigh,
-    };
-    final foreground = switch (status) {
-      'critical' => scheme.onErrorContainer,
-      'queued' => scheme.onSurfaceVariant,
-      'in_progress' => scheme.onSecondaryContainer,
-      'completed' => scheme.onPrimaryContainer,
-      _ => scheme.onSurfaceVariant,
-    };
+    final swatch = AppStatusColors.of(context).byKind(_taskStatusKind(status));
+    final background = swatch.container;
+    final foreground = swatch.onContainer;
     final label = status.replaceAll('_', ' ').toUpperCase();
 
     return Material(
       color: background,
-      borderRadius: BorderRadius.circular(20),
+      borderRadius: BorderRadius.circular(AppSurfaces.of(context).chipRadius),
       child: Padding(
         padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
         child: Row(
@@ -1401,6 +1390,16 @@ class _StatusSummaryCard extends StatelessWidget {
   }
 }
 
+/// Maps a task status to a semantic [StatusKind] (red=critical, blue=in
+/// progress, green=completed, grey=queued).
+StatusKind _taskStatusKind(String status) => switch (status) {
+  'critical' => StatusKind.danger,
+  'in_progress' => StatusKind.info,
+  'completed' => StatusKind.success,
+  'queued' => StatusKind.neutral,
+  _ => StatusKind.neutral,
+};
+
 String _assignedAgent(Map<String, Profile> profileById, String? userId) {
   if (userId == null || userId.isEmpty) {
     return 'Unassigned';
@@ -1422,21 +1421,9 @@ class _StatusBadge extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final scheme = Theme.of(context).colorScheme;
-    final background = switch (status) {
-      'critical' => scheme.errorContainer,
-      'queued' => scheme.surfaceContainerHighest,
-      'in_progress' => scheme.secondaryContainer,
-      'completed' => scheme.primaryContainer,
-      _ => scheme.surfaceContainerHighest,
-    };
-    final foreground = switch (status) {
-      'critical' => scheme.onErrorContainer,
-      'queued' => scheme.onSurfaceVariant,
-      'in_progress' => scheme.onSecondaryContainer,
-      'completed' => scheme.onPrimaryContainer,
-      _ => scheme.onSurfaceVariant,
-    };
+    final swatch = AppStatusColors.of(context).byKind(_taskStatusKind(status));
+    final background = swatch.container;
+    final foreground = swatch.onContainer;
 
     return Badge(
       backgroundColor: background,