Модуль связей и Klipy

backend/src/Modules/Relations/Application/Contacts/GetContacts.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Knot.Modules.Relations.Domain;
+using Knot.Shared.Kernel;
+using Microsoft.EntityFrameworkCore;
+using Knot.Modules.Relations.Application.Abstractions;
+
+namespace Knot.Modules.Relations.Application.Contacts;
+
+public record ContactDto(
+    Guid Id,
+    string Username,
+    string DisplayName,
+    string Avatar,
+    bool IsOnline,
+    DateTime? LastSeen,
+    Guid RelationId,
+    bool IsBlocked = false,
+    bool IsExternal = false,
+    string? Domain = null);
+
+public record GetContactsQuery(Guid UserId) : IQuery<List<ContactDto>>;
+
+internal sealed class GetContactsQueryHandler : IQueryHandler<GetContactsQuery, List<ContactDto>>
+{
+    private readonly IContactsDbContext _context;
+
+    public GetContactsQueryHandler(IContactsDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<Result<List<ContactDto>>> Handle(GetContactsQuery request, CancellationToken cancellationToken)
+    {
+        var relations = await _context.Contacts
+            .Where(c => (c.UserId == request.UserId || c.ContactId == request.UserId) && c.Status == ContactStatus.Accepted)
+            .ToListAsync(cancellationToken);
+
+        var contactIds = relations.Select(c => c.UserId == request.UserId ? c.ContactId : c.UserId).ToList();
+        
+        var replicas = await _context.UserReplicas
+            .Where(r => contactIds.Contains(r.Id))
+            .ToListAsync(cancellationToken);
+
+        var result = new List<ContactDto>();
+
+        foreach (var replica in replicas)
+        {
+            var rel = relations.First(c => c.UserId == replica.Id || c.ContactId == replica.Id);
+            
+            result.Add(new ContactDto(
+                replica.Id,
+                replica.Username,
+                replica.DisplayName,
+                replica.Avatar,
+                false, // Presence handled by another service or real-time
+                null,
+                rel.Id,
+                rel.Status == ContactStatus.Blocked,
+                replica.IsExternal,
+                replica.Domain
+            ));
+        }
+
+        return Result.Success(result);
+    }
+}