fix(chatwin): only fire plugins_post_chat_message_display on incoming

The trigger was wired into outgoing / outgoing-carbon / history paths
too, which made plugins like sounds.py play the "new message" sound
when opening a chat (history loads), sending a message yourself, or
receiving a carbon of your own sent message from another device.

Restrict the call to chatwin_incoming_msg — matches the semantic of
"a remote party sent a chat message and it was displayed".

src/ui/chatwin.c

@@ -399,8 +399,6 @@ chatwin_outgoing_msg(ProfChatWin* chatwin, const char* const message, const char
         win_print_outgoing((ProfWin*)chatwin, enc_char, id, replace_id, display_message);
     }
 
-    plugins_post_chat_message_display(myjid->barejid, myjid->resourcepart, display_message);
-
     // Save last id and message for LMC
     // Note: if the same message is to be corrected several times, the id of the original message is used in each case
     // https://xmpp.org/extensions/xep-0308.html#rules
@@ -434,7 +432,6 @@ chatwin_outgoing_carbon(ProfChatWin* chatwin, ProfMessage* message)
 
     win_print_outgoing(window, enc_char, message->id, message->replace_id, message->plain);
 
-    plugins_post_chat_message_display(message->from_jid->barejid, message->from_jid->resourcepart, message->plain);
     message->plain = old_plain;
 
     int num = wins_get_num(window);
@@ -561,7 +558,6 @@ _chatwin_history(ProfChatWin* chatwin, const char* const contact_barejid)
             if (plugin_msg)
                 msg->plain = plugin_msg;
             win_print_history((ProfWin*)chatwin, msg);
-            plugins_post_chat_message_display(msg->from_jid->barejid, msg->from_jid->resourcepart, msg->plain);
             msg->plain = old_plain;
             curr = g_slist_next(curr);
         }
@@ -601,7 +597,6 @@ chatwin_db_history(ProfChatWin* chatwin, const gchar* start_time, const gchar* e
         } else {
             win_print_history((ProfWin*)chatwin, msg);
         }
-        plugins_post_chat_message_display(msg->from_jid->barejid, msg->from_jid->resourcepart, msg->plain);
         msg->plain = old_plain;
         curr = g_slist_next(curr);
     }