xpc: include attachment guids

kordophoned/src/xpc/rpc.rs

@@ -155,6 +155,15 @@ pub async fn dispatch(
                         dict_put_str(&mut m, "text", &msg.text.replace('\u{FFFC}', ""));
                         dict_put_i64_as_str(&mut m, "date", msg.date.and_utc().timestamp());
                         dict_put_str(&mut m, "sender", &msg.sender.display_name());
+
+                        // Include attachment GUIDs for the client to resolve/download
+                        let attachment_guids: Vec<String> = msg
+                            .attachments
+                            .iter()
+                            .map(|a| a.guid.clone())
+                            .collect();
+                        m.insert(cstr("attachment_guids"), array_from_strs(attachment_guids));
+                        
                         items.push(Message::Dictionary(m));
                     }
                     let mut reply: XpcMap = HashMap::new();