From c967e53913200277b29df58dd67a730ff2b88416 Mon Sep 17 00:00:00 2001
From: doliv Debian fisso <61095881+doliv8@users.noreply.github.com>
Date: Sun, 21 Dec 2025 15:13:23 +0100
Subject: [PATCH] Fixed HistoryItem unread check for Forum chats

---
 Telegram/SourceFiles/history/history_item.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Telegram/SourceFiles/history/history_item.cpp b/Telegram/SourceFiles/history/history_item.cpp
index b0aa8497e1eba..078c2f078dcf9 100644
--- a/Telegram/SourceFiles/history/history_item.cpp
+++ b/Telegram/SourceFiles/history/history_item.cpp
@@ -3670,6 +3670,10 @@ bool HistoryItem::unread(not_null<Data::Thread*> thread) const {
 			} else if (const auto channel = _history->peer->asChannel()) {
 				if (!channel->isMegagroup()) {
 					return false;
+				} else if (channel->isForum()) {
+					if (const auto topic = this->topic()) {
+						return topic->isServerSideUnread(this);
+					}
 				}
 			}
 		}