Revert "fix(ui/favourites): DM unread badge cleared by companion app sync"

This reverts commit f6d10bb8b2.

examples/companion_radio/ui-new/UITask.cpp

@@ -1344,9 +1344,7 @@ void UITask::msgRead(int msgcount) {
   _msgcount = msgcount;
   if (msgcount == 0) {
     _room_unread = 0;
-    // Do NOT clear _dm_unread_table here — it tracks per-contact UI badges
-    // independently of the offline queue. Badges are cleared only when the
-    // user opens the DM (clearDMUnread) or explicitly marks all read.
+    memset(_dm_unread_table, 0, sizeof(_dm_unread_table));
     ((QuickMsgScreen*)quick_msg)->clearAllChannelUnread();
   }
 }