Implement pricing management functionality and update related components

- Added new endpoints for managing global pricing settings, including retrieval and updates for `PricePerConfigPerQuarter` and `PricePerConfigPerYear`.
- Updated `RoleService` and related commands to remove pricing fields from role management, ensuring a clear separation between role configurations and global pricing.
- Enhanced the `FactoryResetCommandHandler` to include seeding of pricing settings during a factory reset.
- Modified frontend components to support new pricing settings, including forms for creating and updating pricing information.
- Updated API documentation to reflect changes in pricing management endpoints and their expected request/response formats.
- Adjusted tests to ensure proper coverage for new pricing functionalities and their integration with existing role management features.

docs/api-design.md

@@ -244,10 +244,12 @@ reject/approve владением тикета не ограничены. Еди
 | POST   | `/api/admin/activation-requests/{id}/approve`   | admin | —                        | `204 No Content` |
 | POST   | `/api/admin/activation-requests/{id}/reject`    | admin | `{ reason? }`            | `204 No Content` |
 | GET    | `/api/admin/roles`                              | admin | —                        | `RoleDto[]` |
-| POST   | `/api/admin/roles`                              | admin | `{ name, maxConfigs, maxIpLimit, pricePerConfigPerQuarter?, pricePerConfigPerYear? }` | `RoleDto` |
-| PUT    | `/api/admin/roles/{id}`                         | admin | `{ maxConfigs, maxIpLimit, pricePerConfigPerQuarter?, pricePerConfigPerYear? }` | `RoleDto` (для `admin` цена игнорируется, остаётся `null`) |
+| POST   | `/api/admin/roles`                              | admin | `{ name, maxConfigs, maxIpLimit }` | `RoleDto` |
+| PUT    | `/api/admin/roles/{id}`                         | admin | `{ maxConfigs, maxIpLimit }` | `RoleDto` |
 | DELETE | `/api/admin/roles/{id}`                         | admin | —                        | `204 No Content` (системные `admin`/`user` удалить нельзя) |
 | PATCH  | `/api/admin/users/{id}/role`                    | admin | `{ roleId }`             | `204 No Content` (`409 Roles.CannotRemoveLastAdmin`, если у цели сейчас `admin`, новая роль другая, и это единственный админ) |
+| GET    | `/api/admin/pricing`                            | admin | —                        | `PricingSettingsDto` (глобальная справочная цена за конфиг, одна на весь сервис — не per-роль) |
+| PUT    | `/api/admin/pricing`                            | admin | `{ pricePerConfigPerQuarter?, pricePerConfigPerYear? }` | `PricingSettingsDto` |
 
 Нет отдельного эндпоинта «активировать напрямую без запроса» — активация только через
 approve/reject над `ActivationRequest`.