Enhance role management by adding pricing fields and updating related logic

- Updated `CreateRoleCommand` and `UpdateRoleCommand` to include optional pricing fields: `PricePerConfigPerQuarter` and `PricePerConfigPerYear`.
- Modified `RoleEndpoints` to handle the new pricing parameters during role creation and updates.
- Enhanced validation logic in `CreateRoleCommandValidator` and `UpdateRoleCommandValidator` to ensure pricing fields are non-negative when provided.
- Updated `RoleDto` and `SelectableRoleDto` to include pricing information, ensuring proper data handling in API responses.
- Adjusted frontend components to support new pricing fields in role forms and display total costs based on configurations.
- Updated API documentation to reflect changes in role management endpoints and pricing structure.

backend/src/PnvPanel.Application/Support/ListSelectableRoles/ListSelectableRolesQueryHandler.cs

@@ -9,29 +9,31 @@ public sealed class ListSelectableRolesQueryHandler(
     IRoleService roleService,
     IIdentityService identityService,
     ICurrentUser currentUser
-) : IQueryHandler<ListSelectableRolesQuery, Result<IReadOnlyList<RoleDto>>>
+) : IQueryHandler<ListSelectableRolesQuery, Result<IReadOnlyList<SelectableRoleDto>>>
 {
     // Совпадает со значением Infrastructure.Identity.RoleNames.Admin — см. пояснение в
     // CreateRoleRequestTicketCommandHandler (Application не может ссылаться на Infrastructure).
     private const string AdminRoleName = "admin";
 
-    public async Task<Result<IReadOnlyList<RoleDto>>> Handle(
+    public async Task<Result<IReadOnlyList<SelectableRoleDto>>> Handle(
         ListSelectableRolesQuery query,
         CancellationToken cancellationToken
     )
     {
         if (currentUser.UserId is not { } userId)
-            return Result.Failure<IReadOnlyList<RoleDto>>(AuthErrors.Unauthorized);
+            return Result.Failure<IReadOnlyList<SelectableRoleDto>>(AuthErrors.Unauthorized);
 
         var profile = await identityService.GetProfileAsync(userId, cancellationToken);
         var roles = await roleService.ListRolesAsync(cancellationToken);
 
         // Без admin (нельзя запросить) и без текущей роли пользователя (уже есть — нечего запрашивать).
+        // Цена (RoleDto.PricePerConfigPer*) намеренно не пробрасывается — видна только админу.
         var selectable = roles
             .Where(r => !r.Name.Equals(AdminRoleName, StringComparison.OrdinalIgnoreCase))
             .Where(r => profile is null || r.Id != profile.RoleId)
+            .Select(r => new SelectableRoleDto(r.Id, r.Name, r.MaxConfigs, r.MaxIpLimit))
             .ToList();
 
-        return Result.Success<IReadOnlyList<RoleDto>>(selectable);
+        return Result.Success<IReadOnlyList<SelectableRoleDto>>(selectable);
     }
 }