Доработан менеджер состояний.

BotPages.Core/Navigation/IStateStore.cs

@@ -8,7 +8,7 @@
         /// <summary>
         /// Получает состояние пользователя.
         /// </summary>
-        Task<UserState> GetAsync(long userId, CancellationToken ct);
+        Task<UserState> GetAsync(string transportId, long userId, CancellationToken ct);
 
         /// <summary>
         /// Сохраняет состояние пользователя.

BotPages.Core/Navigation/InMemoryStateStore.cs

@@ -6,17 +6,21 @@
     /// </summary>
     public sealed class InMemoryStateStore : IStateStore
     {
-        private readonly Dictionary<long, UserState> _store = new();
+        private readonly Dictionary<(string chatClientId, long userId), UserState> _store = new();
 
         /// <summary>
         /// Получает состояние пользователя, создавая новое при отсутствии.
         /// </summary>
-        public Task<UserState> GetAsync(long userId, CancellationToken ct)
+        public Task<UserState> GetAsync(string chatClientId, long userId, CancellationToken ct)
         {
-            if (!_store.TryGetValue(userId, out var st))
+            if (!_store.TryGetValue((chatClientId, userId), out var st))
             {
-                st = new UserState { UserId = userId };
-                _store[userId] = st;
+                st = new UserState 
+                {
+                    UserId = userId, 
+                    ChatClientId = chatClientId,
+                };
+                _store[(chatClientId, userId)] = st;
             }
             return Task.FromResult(st);
         }
@@ -26,7 +30,7 @@
         /// </summary>
         public Task SaveAsync(UserState state, CancellationToken ct)
         {
-            _store[state.UserId] = state;
+            _store[(state.ChatClientId, state.UserId)] = state;
             return Task.CompletedTask;
         }
     }

BotPages.Core/Navigation/NavigationService.cs

@@ -22,7 +22,7 @@
         /// </summary>
         public async Task PushAsync(string pageId, object? args, UpdateContext ctx, CancellationToken ct)
         {
-            var state = await _store.GetAsync(ctx.User.Id, ct);
+            var state = await _store.GetAsync(ctx.Client.Id, ctx.User.Id, ct);
             state.Stack.Add(new NavEntry(pageId, args));
             await _store.SaveAsync(state, ct);
 
@@ -35,7 +35,7 @@
         /// </summary>
         public async Task ReplaceAsync(string pageId, object? args, UpdateContext ctx, CancellationToken ct)
         {
-            var state = await _store.GetAsync(ctx.User.Id, ct);
+            var state = await _store.GetAsync(ctx.Client.Id, ctx.User.Id, ct);
             if (state.Stack.Count > 0) state.Stack[^1] = new NavEntry(pageId, args);
             else state.Stack.Add(new NavEntry(pageId, args));
             await _store.SaveAsync(state, ct);
@@ -49,7 +49,7 @@
         /// </summary>
         public async Task PopAsync(UpdateContext ctx, CancellationToken ct)
         {
-            var state = await _store.GetAsync(ctx.User.Id, ct);
+            var state = await _store.GetAsync(ctx.Client.Id, ctx.User.Id, ct);
             if (state.Stack.Count == 0) return;
 
             var currentId = state.Stack[^1].PageId;
@@ -92,7 +92,7 @@
         /// </summary>
         public async Task<NavEntry?> CurrentAsync(UpdateContext ctx, CancellationToken ct)
         {
-            var state = await _store.GetAsync(ctx.User.Id, ct);
+            var state = await _store.GetAsync(ctx.Client.Id, ctx.User.Id, ct);
             return state.Stack.Count == 0 ? null : state.Stack[^1];
         }
 
@@ -101,7 +101,7 @@
         /// </summary>
         public async Task<IReadOnlyList<NavEntry>> StackAsync(UpdateContext ctx, CancellationToken ct)
         {
-            var state = await _store.GetAsync(ctx.User.Id, ct);
+            var state = await _store.GetAsync(ctx.Client.Id, ctx.User.Id, ct);
             return state.Stack.AsReadOnly();
         }
     }

BotPages.Core/Navigation/UserState.cs

@@ -8,7 +8,12 @@
         /// <summary>
         /// Идентификатор пользователя.
         /// </summary>
-        public long UserId { get; init; }
+        public required long UserId { get; init; }
+
+        /// <summary>
+        /// Идентификатор клиента чата.
+        /// </summary>
+        public required string ChatClientId { get; init; }
 
         /// <summary>
         /// Навигационный стек страниц.

BotPages.Core/Pages/ActionAttribute.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BotPages.Core
+{
+    public class ActionAttribute : Attribute
+    {
+        public ActionAttribute(string label)
+        {
+            Label = label;
+        }
+
+        public string Label { get; }
+    }
+}

BotPages.Core/Pages/ActionExtensions.cs

@@ -0,0 +1,48 @@
+using System.Reflection;
+
+namespace BotPages.Core
+{
+    public static class ActionExtensions
+    {
+        private static readonly Dictionary<Type, Dictionary<string, object>> _cache = new();
+
+        public static string GetActionLabel<T>(this T value)
+            where T : Enum
+        {
+            var fieldName = value.ToString();
+            var field = typeof(T).GetField(fieldName, BindingFlags.Public | BindingFlags.Static);
+            return field?.GetCustomAttribute<ActionAttribute>()?.Label ?? fieldName;
+        }
+
+        public static T? FromActionLabel<T>(string? value) where T : struct, Enum
+        {
+            if (value == null) return null;
+
+            var type = typeof(T);
+            if (!_cache.TryGetValue(type, out var map))
+            {
+                map = new Dictionary<string, object>();
+
+                var fields = type.GetFields(BindingFlags.Public | BindingFlags.Static);
+
+                foreach (var field in fields)
+                {
+                    var fieldValue = field.GetValue(null)!;
+                    var fieldName = field.Name;
+
+                    var attr = field.GetCustomAttribute<ActionAttribute>();
+
+                    if (attr != null)
+                    {
+                        fieldName = attr.Label;
+                    }
+
+                    map[fieldName] = fieldValue;
+                }
+
+            }
+
+            return map.TryGetValue(value, out var result) ? (T)result : null;
+        }
+    }
+}

BotPages.Core/Pages/PageAction.cs

@@ -18,11 +18,23 @@
         /// <summary>
         /// Тип кнопки: inline или reply.
         /// </summary>
-        public ActionPlacement Placement { get; init; } = ActionPlacement.Inline;
+        public ActionPlacement Placement { get; init; } = ActionPlacement.Reply;
 
         /// <summary>
         /// Номер ряда для макета (0 — первая строка).
         /// </summary>
         public int Row { get; init; } = 0;
+
+        public PageAction()
+        {
+
+        }
+
+
+        public PageAction(Enum en)
+        {
+            Label = en.GetActionLabel();
+            Value = en.ToString();
+        }
     }
 }

BotPages.Core/Transport/IChatClient.cs

@@ -2,10 +2,15 @@
 {
     /// <summary>
     /// Универсальный клиент для отправки сообщений и файлов в чат.
-    /// Адаптеры (Telegram, MAX и др.) реализуют этот интерфейс.
+    /// Адаптеры реализуют этот интерфейс.
     /// </summary>
     public interface IChatClient
     {
+        /// <summary>
+        /// Идентификатор клиента.
+        /// </summary>
+        string Id { get; init; }
+
         /// <summary>
         /// Отправляет текстовое сообщение.
         /// Может сопровождаться клавиатурой (inline или reply).