feat(tgbot): route admin notifications to a forum topic (#6879)

Admins who run the bot in a forum supergroup got every notification in the
General topic. An admin chat ID may now carry a topic, chatId:topicId, and the
bot's admin messages and reports go to that topic. Repeated chats collapse into
one entry and a second, different topic for the same chat is rejected, in the
panel and in the docs setup helper alike. The chat ID hint in every locale and
the English, Persian, Russian and Chinese guides describe the form.

internal/web/service/tgbot/tgbot_send.go

@@ -133,9 +133,10 @@ func (t *Tgbot) SendMsgToTgbot(chatId int64, msg string, replyMarkup ...telego.R
 	allMessages := pageMessage(msg, telegramPageLimit)
 	for n, message := range allMessages {
 		params := telego.SendMessageParams{
-			ChatID:    tu.ID(chatId),
-			Text:      message,
-			ParseMode: "HTML",
+			ChatID:          tu.ID(chatId),
+			MessageThreadID: adminTopic(chatId),
+			Text:            message,
+			ParseMode:       "HTML",
 		}
 		// only add replyMarkup to last message
 		if len(replyMarkup) > 0 && n == (len(allMessages)-1) {
@@ -260,9 +261,10 @@ func (t *Tgbot) SendMsgToTgbotDeleteAfter(chatId int64, msg string, delayInSecon
 
 	// Send the message
 	sentMsg, err := bot.SendMessage(context.Background(), &telego.SendMessageParams{
-		ChatID:      tu.ID(chatId),
-		Text:        msg,
-		ReplyMarkup: replyMarkupParam, // Use the correct replyMarkup value
+		ChatID:          tu.ID(chatId),
+		MessageThreadID: adminTopic(chatId),
+		Text:            msg,
+		ReplyMarkup:     replyMarkupParam, // Use the correct replyMarkup value
 	})
 	if err != nil {
 		logger.Warning("Failed to send message:", err)