Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: dsh0416

crates/gdcef/src/cef_texture/mod.rs

@@ -85,7 +85,8 @@ pub struct CefTexture {
 impl ITextureRect for CefTexture {
     fn init(base: Base<TextureRect>) -> Self {
         let mut texture2d_helper = CefTexture2D::new_gd();
-        // CefTexture owns the active runtime; helper is settings-only.
+        // Runtime App state lives inside texture2d_helper; CefTexture owns its lifecycle and ticking,
+        // so ensure any existing runtime in the helper is shut down before this instance takes over.
         texture2d_helper.bind_mut().shutdown();
 
         Self {

crates/gdcef/src/cef_texture/rendering.rs

@@ -87,6 +87,8 @@ impl CefTexture {
                             accel_state.popup_rd_rid = Some(new_rid);
                             accel_state.popup_width = new_w;
                             accel_state.popup_height = new_h;
+                            // Ensure no stale resize request remains after completing popup resize.
+                            accel_state.needs_popup_texture = None;
                         }
                     });
                 }