fix(telegram): separate thread params for typing vs messages

Telegram General topic (id=1) has inconsistent API behavior:
- sendMessage: rejects explicit message_thread_id=1
- sendChatAction: requires message_thread_id=1 for typing to show

Split into two helper functions:
- buildTelegramThreadParams: excludes General topic for messages
- buildTypingThreadParams: includes General topic for typing

src/telegram/bot-message-context.ts

@@ -18,6 +18,7 @@ import {
   buildTelegramGroupFrom,
   buildTelegramGroupPeerId,
   buildTelegramThreadParams,
+  buildTypingThreadParams,
   describeReplyTarget,
   extractTelegramLocation,
   hasBotMention,
@@ -92,7 +93,7 @@ export const buildTelegramMessageContext = async ({
 
   const sendTyping = async () => {
     try {
-      await bot.api.sendChatAction(chatId, "typing", buildTelegramThreadParams(resolvedThreadId));
+      await bot.api.sendChatAction(chatId, "typing", buildTypingThreadParams(resolvedThreadId));
     } catch (err) {
       logVerbose(`telegram typing cue failed for chat ${chatId}: ${String(err)}`);
     }