Add admin configs endpoint and related UI components

- Introduced a new endpoint to list all admin configs, enhancing the admin interface for better management.
- Updated API documentation to include the new `/configs` endpoint with pagination and search capabilities.
- Added routing and UI elements for the configs section in the admin panel, improving navigation and accessibility.
- Enhanced localization for the configs feature in both Russian and English, ensuring a user-friendly experience.

backend/src/PnvPanel.Api/Endpoints/AdminUserEndpoints.cs

@@ -1,9 +1,11 @@
 using PnvPanel.Api.Common;
+using PnvPanel.Application.Admin.Configs;
 using PnvPanel.Application.Admin.Users;
 using PnvPanel.Application.Common.Interfaces;
 using PnvPanel.Application.Common.Messaging;
 using PnvPanel.Application.Common.Models;
 using PnvPanel.Application.Configs;
+using PnvPanel.Domain.Configs;
 using PnvPanel.Infrastructure.Identity;
 
 namespace PnvPanel.Api.Endpoints;
@@ -22,6 +24,7 @@ public static class AdminUserEndpoints
         admin.MapPost("/users/{id:guid}/reset-password", ResetPassword).Produces(StatusCodes.Status204NoContent);
         admin.MapDelete("/users/{id:guid}", DeleteUser).Produces(StatusCodes.Status204NoContent);
         admin.MapGet("/users/{id:guid}/configs", GetUserConfigs).Produces<IReadOnlyList<VpnConfigDto>>();
+        admin.MapGet("/configs", ListAllConfigs).Produces<PagedList<AdminVpnConfigDto>>();
         admin.MapDelete("/configs/{id:guid}", ForceRevokeConfig).Produces(StatusCodes.Status204NoContent);
 
         return app;
@@ -65,6 +68,14 @@ public static class AdminUserEndpoints
         return result.ToHttpResult();
     }
 
+    private static async Task<IResult> ListAllConfigs(
+        int page, int pageSize, string? search, ConfigStatus? status, ISender sender, CancellationToken cancellationToken)
+    {
+        var query = new ListAllConfigsQuery(page <= 0 ? 1 : page, pageSize <= 0 ? 20 : pageSize, search, status);
+        var result = await sender.Send(query, cancellationToken);
+        return result.ToHttpResult();
+    }
+
     private static async Task<IResult> ForceRevokeConfig(Guid id, ISender sender, CancellationToken cancellationToken)
     {
         var result = await sender.Send(new ForceRevokeConfigCommand(id), cancellationToken);

backend/src/PnvPanel.Application/Admin/Configs/AdminVpnConfigDto.cs

@@ -0,0 +1,11 @@
+using PnvPanel.Domain.Configs;
+using PnvPanel.Domain.Inbounds;
+
+namespace PnvPanel.Application.Admin.Configs;
+
+/// <summary>Строка глобального списка конфигов для админа — в отличие от VpnConfigDto (self-service)
+/// содержит владельца и ноду, т.к. список не скоупится одним пользователем.</summary>
+public sealed record AdminVpnConfigDto(
+    Guid Id, Guid UserId, string UserName, string? Label, string ClientEmail, VpnProtocol Protocol,
+    string Location, string NodeName, long UsedUpBytes, long UsedDownBytes, DateTimeOffset? ExpiresAt,
+    ConfigStatus Status, DateTimeOffset CreatedAt);

backend/src/PnvPanel.Application/Admin/Configs/ListAllConfigsQuery.cs

@@ -0,0 +1,11 @@
+using PnvPanel.Application.Common.Interfaces;
+using PnvPanel.Application.Common.Messaging;
+using PnvPanel.Application.Common.Models;
+using PnvPanel.Domain.Configs;
+
+namespace PnvPanel.Application.Admin.Configs;
+
+/// <summary><paramref name="Search"/> матчится по ClientEmail/Label — это то, по чему админ сверяет
+/// конфиг с записью в 3x-ui, а не по владельцу (для поиска по пользователю есть /admin/users).</summary>
+public sealed record ListAllConfigsQuery(int Page, int PageSize, string? Search, ConfigStatus? Status)
+    : IQuery<Result<PagedList<AdminVpnConfigDto>>>;

backend/src/PnvPanel.Application/Admin/Configs/ListAllConfigsQueryHandler.cs

@@ -0,0 +1,58 @@
+using Microsoft.EntityFrameworkCore;
+using PnvPanel.Application.Common.Interfaces;
+using PnvPanel.Application.Common.Messaging;
+using PnvPanel.Application.Common.Models;
+
+namespace PnvPanel.Application.Admin.Configs;
+
+public sealed class ListAllConfigsQueryHandler(IAppDbContext dbContext, IIdentityService identityService)
+    : IQueryHandler<ListAllConfigsQuery, Result<PagedList<AdminVpnConfigDto>>>
+{
+    public async Task<Result<PagedList<AdminVpnConfigDto>>> Handle(ListAllConfigsQuery query, CancellationToken cancellationToken)
+    {
+        var page = query.Page <= 0 ? 1 : query.Page;
+        var pageSize = query.PageSize is <= 0 or > 100 ? 20 : query.PageSize;
+
+        var configsQuery = dbContext.VpnConfigs.AsNoTracking();
+
+        if (query.Status is { } status)
+            configsQuery = configsQuery.Where(c => c.Status == status);
+
+        if (!string.IsNullOrWhiteSpace(query.Search))
+        {
+            var search = query.Search.Trim();
+            configsQuery = configsQuery.Where(c => c.ClientEmail.Contains(search) || (c.Label != null && c.Label.Contains(search)));
+        }
+
+        var pageResult = await configsQuery
+            .OrderByDescending(c => c.CreatedAt)
+            .ToPagedListAsync(page, pageSize, cancellationToken);
+
+        var inboundIds = pageResult.Items.Select(c => c.InboundId).Distinct().ToList();
+        var inbounds = (await dbContext.Inbounds.AsNoTracking()
+                .Where(i => inboundIds.Contains(i.Id))
+                .ToListAsync(cancellationToken))
+            .ToDictionary(i => i.Id);
+
+        var nodeIds = inbounds.Values.Select(i => i.NodeId).Distinct().ToList();
+        var nodes = (await dbContext.Nodes.AsNoTracking()
+                .Where(n => nodeIds.Contains(n.Id))
+                .ToListAsync(cancellationToken))
+            .ToDictionary(n => n.Id);
+
+        var userNames = await identityService.GetUserNamesAsync(
+            pageResult.Items.Select(c => c.UserId).Distinct().ToList(), cancellationToken);
+
+        var items = pageResult.Items.Select(c =>
+        {
+            var inbound = inbounds.GetValueOrDefault(c.InboundId);
+            var node = inbound is null ? null : nodes.GetValueOrDefault(inbound.NodeId);
+            return new AdminVpnConfigDto(
+                c.Id, c.UserId, userNames.GetValueOrDefault(c.UserId, "?"), c.Label, c.ClientEmail, c.Protocol,
+                inbound?.DisplayName ?? inbound?.Remark ?? "?", node?.Name ?? "?",
+                c.UsedUpBytes, c.UsedDownBytes, c.ExpiresAt, c.Status, c.CreatedAt);
+        }).ToList();
+
+        return Result.Success(new PagedList<AdminVpnConfigDto>(items, pageResult.Total, pageResult.Page, pageResult.PageSize));
+    }
+}