feat: granular permissions, export backup, user/role management

- PermissionSeeder: 29 permissions with role mapping (admin/manager/staff)
- Policies updated to use hasPermissionTo() instead of hasRole()
- ExportBackup command: JSON per-table backup with chunk processing
- UserResource: CRUD users with role assignment (admin only)
- RoleResource: CRUD roles with permission assignment (admin only)
- UserPolicy + RolePolicy: admin-only access control
- ImportCskh: detailed skip logging with color in dry-run mode
- Widgets: permission-based visibility checks
- Tests: 8/8 pass (21 assertions)

app/Providers/Filament/AdminPanelProvider.php

@@ -33,17 +33,18 @@ class AdminPanelProvider extends PanelProvider
             ->path('admin')
             ->login()
             ->brandName('AfterSales CRM')
-            ->topNavigation()
+            ->sidebarCollapsibleOnDesktop()
             ->colors([
-                'primary' => '#0058be',
-                'secondary' => '#585f6c',
-                'gray' => '#585f6c',
-                'success' => '#10b981',
-                'warning' => '#f59e0b',
-                'danger' => '#ba1a1a',
-                'info' => '#3b82f6',
+                'primary' => '#1a56db',
+                'secondary' => '#64748b',
+                'gray' => '#64748b',
+                'success' => '#059669',
+                'warning' => '#d97706',
+                'danger' => '#dc2626',
+                'info' => '#2563eb',
             ])
             ->font('Inter')
+            ->favicon(asset('favicon.svg'))
             ->discoverResources(in: app_path('Filament/Resources'), for: 'App\Filament\Resources')
             ->discoverPages(in: app_path('Filament/Pages'), for: 'App\Filament\Pages')
             ->pages([
@@ -55,9 +56,11 @@ class AdminPanelProvider extends PanelProvider
             ])
             ->navigationGroups([
                 NavigationGroup::make()
-                    ->label('Customer Care'),
+                    ->label('Customer Care')
+                    ->icon('heroicon-o-chat-bubble-left-right'),
                 NavigationGroup::make()
-                    ->label('Management'),
+                    ->label('Management')
+                    ->icon('heroicon-o-cog-6-tooth'),
             ])
             ->middleware([
                 EncryptCookies::class,