Enhance role selection functionality in ListSelectableRolesQueryHandler and update frontend role display

- Updated ListSelectableRolesQueryHandler to include IIdentityService and ICurrentUser for user authorization and profile retrieval.
- Added logic to filter out the current user's role and admin roles from the selectable roles list.
- Enhanced CreateRoleRequestDialog to display role options with additional information, including max configs and IP limits, using localization support.
- Updated i18n resources to include new role option formatting for both Russian and English.

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

@@ -1,11 +1,15 @@
+using PnvPanel.Application.Auth;
 using PnvPanel.Application.Common.Interfaces;
 using PnvPanel.Application.Common.Messaging;
 using PnvPanel.Application.Common.Models;
 
 namespace PnvPanel.Application.Support.ListSelectableRoles;
 
-public sealed class ListSelectableRolesQueryHandler(IRoleService roleService)
-    : IQueryHandler<ListSelectableRolesQuery, Result<IReadOnlyList<RoleDto>>>
+public sealed class ListSelectableRolesQueryHandler(
+    IRoleService roleService,
+    IIdentityService identityService,
+    ICurrentUser currentUser
+) : IQueryHandler<ListSelectableRolesQuery, Result<IReadOnlyList<RoleDto>>>
 {
     // Совпадает со значением Infrastructure.Identity.RoleNames.Admin — см. пояснение в
     // CreateRoleRequestTicketCommandHandler (Application не может ссылаться на Infrastructure).
@@ -16,9 +20,16 @@ public sealed class ListSelectableRolesQueryHandler(IRoleService roleService)
         CancellationToken cancellationToken
     )
     {
+        if (currentUser.UserId is not { } userId)
+            return Result.Failure<IReadOnlyList<RoleDto>>(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).
         var selectable = roles
             .Where(r => !r.Name.Equals(AdminRoleName, StringComparison.OrdinalIgnoreCase))
+            .Where(r => profile is null || r.Id != profile.RoleId)
             .ToList();
 
         return Result.Success<IReadOnlyList<RoleDto>>(selectable);