Новый api отправки сообщений

BotPages.Telegram/MessageBuilderExtensions.cs

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+using BotPages.Core.Abstractions;
+using BotPages.Core.Messaging;
+
+namespace BotPages.Telegram;
+
+/// <summary>
+/// Ðàñøèðåíèÿ äëÿ `MessageBuilder` ñïåöèôè÷íûå äëÿ Telegram.
+/// Ïîçâîëÿþò óäîáíî çàäàòü `TelegramOptions` äëÿ êîíêðåòíîãî ñîîáùåíèÿ
+/// áåç èçìåíåíèÿ ñàìîãî áèëäåðà.
+/// </summary>
+public static class MessageBuilderExtensions
+{
+    /// <summary>
+    /// Óñòàíîâèòü îïöèè Telegram äëÿ êîíêðåòíîãî ñîîáùåíèÿ (ïåðåîïðåäåëÿþò îïöèè àäàïòåðà).
+    /// </summary>
+    public static MessageBuilder WithTelegramOptions(this MessageBuilder builder, TelegramOptions options)
+    {
+        // Ensure bag exists
+        var bag = (builder as object) switch
+        {
+            MessageBuilder mb => GetAdapterBag(mb) ?? CreateAndSetAdapterBag(mb),
+            _ => null
+        };
+
+        bag?.Set("telegram", options);
+        return builder;
+    }
+
+    // Reflection helpers to access private adapterOptions field on MessageBuilder
+    private static AdapterOptionsBag? GetAdapterBag(MessageBuilder builder)
+    {
+        var fi = typeof(MessageBuilder).GetField("_adapterOptions", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
+        return fi?.GetValue(builder) as AdapterOptionsBag;
+    }
+
+    private static AdapterOptionsBag CreateAndSetAdapterBag(MessageBuilder builder)
+    {
+        var fi = typeof(MessageBuilder).GetField("_adapterOptions", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
+        var bag = new AdapterOptionsBag();
+        fi?.SetValue(builder, bag);
+        return bag;
+    }
+}