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/Filament/Resources/Roles/Schemas/RoleForm.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Filament\Resources\Roles\Schemas;
+
+use Filament\Forms\Components\CheckboxList;
+use Filament\Forms\Components\TextInput;
+use Filament\Schemas\Schema;
+use Filament\Schemas\Components\Section;
+use Spatie\Permission\Models\Permission;
+
+class RoleForm
+{
+    public static function configure(Schema $schema): Schema
+    {
+        return $schema
+            ->components([
+                Section::make()
+                    ->schema([
+                        TextInput::make('name')
+                            ->label('Role Name')
+                            ->required()
+                            ->maxLength(255)
+                            ->unique(ignoreRecord: true),
+                    ]),
+
+                Section::make('Permissions')
+                    ->description('Chọn quyền cho role này')
+                    ->schema([
+                        CheckboxList::make('permissions')
+                            ->label('')
+                            ->options(fn () => Permission::orderBy('name')->pluck('name', 'name')->toArray())
+                            ->columns(4)
+                            ->columnSpanFull(),
+                    ]),
+            ]);
+    }
+}