feat(dashboard): add Roles CRUD with permission-based menu filtering

- Roles CRUD: List/Create/Update/Delete actions, controller, requests
- Roles Vue pages: Index, Create, Edit (Options API, DashboardLayout)
- SidebarNav: filter menu items by user permissions via Inertia shared data
- HandleInertiaRequests: share permissions and roles arrays to frontend
- HttpKernel: register dashboard.permission middleware alias
- SidebarNavItem: add shield-check icon mapping

app/Containers/Dashboard/UI/WEB/Requests/StoreRoleRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Containers\Dashboard\UI\WEB\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class StoreRoleRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'name' => ['required', 'string', 'max:255', 'unique:roles,name'],
+            'permissions' => ['nullable', 'array'],
+            'permissions.*' => ['string', 'exists:permissions,name'],
+        ];
+    }
+
+    public function messages(): array
+    {
+        return [
+            'name.required' => 'Название роли обязательно для заполнения',
+            'name.unique' => 'Роль с таким названием уже существует',
+        ];
+    }
+}