windows portable: request elevation && run as system

Signed-off-by: 21pages <pages21@163.com>

src/client.rs

@@ -1354,7 +1354,11 @@ impl LoginConfigHandler {
             username: self.id.clone(),
             password: password.into(),
             my_id,
-            my_name: crate::username(),
+            my_name: if cfg!(windows) {
+                crate::platform::get_active_username()
+            } else {
+                crate::username()
+            },
             option: self.get_option_message(true).into(),
             session_id: self.session_id,
             version: crate::VERSION.to_string(),