gpui: Fix pre-edit position after applying scale factor (#18214)

before:

![image](https://github.com/user-attachments/assets/20590089-3333-4ca8-a371-b07acfbe43f9)

after:

![image](https://github.com/user-attachments/assets/2d25623e-0602-4d24-b563-64e1d2ec3492)

Release Notes:

- N/A

crates/gpui/src/window.rs

@@ -3610,7 +3610,9 @@ impl<'a> WindowContext<'a> {
         self.on_next_frame(|cx| {
             if let Some(mut input_handler) = cx.window.platform_window.take_input_handler() {
                 if let Some(bounds) = input_handler.selected_bounds(cx) {
-                    cx.window.platform_window.update_ime_position(bounds);
+                    cx.window
+                        .platform_window
+                        .update_ime_position(bounds.scale(cx.scale_factor()));
                 }
                 cx.window.platform_window.set_input_handler(input_handler);
             }