sync policy: only ignore empty bodies if there are no attachments

kordophoned/src/daemon/mod.rs

@@ -626,7 +626,10 @@ impl Daemon {
         // the typing indicator or stuff like that. In the future, we need to move to ChatItems instead of Messages.
         let insertable_messages: Vec<kordophone::model::Message> = messages
             .into_iter()
-            .filter(|m| !m.text.is_empty() && !m.text.trim().is_empty())
+            .filter(|m| {
+                (!m.text.is_empty() && !m.text.trim().is_empty())
+                    || !m.file_transfer_guids.is_empty()
+            })
             .collect();
 
         let db_messages: Vec<kordophone_db::models::Message> = insertable_messages