fix: linux tray, defunct process (#12177)

Signed-off-by: fufesou <linlong1266@gmail.com>

src/tray.rs

@@ -21,6 +21,10 @@ pub fn start_tray() {
             return;
         }
     }
+
+    #[cfg(target_os = "linux")]
+    crate::server::check_zombie();
+
     allow_err!(make_tray());
 }
 
@@ -99,9 +103,11 @@ fn make_tray() -> hbb_common::ResultType<()> {
         }
         #[cfg(target_os = "linux")]
         {
-            // Do not use "xdg-open", it won't read config
+            // Do not use "xdg-open", it won't read the config.
             if crate::dbus::invoke_new_connection(crate::get_uri_prefix()).is_err() {
-                crate::run_me::<&str>(vec![]).ok();
+                if let Ok(task) = crate::run_me::<&str>(vec![]) {
+                    crate::server::CHILD_PROCESS.lock().unwrap().push(task);
+                }
             }
         }
     };