edit_prediction_button: Fix Copilot menu not updating after sign out (#38854)

The edit prediction button menu was displaying stale authentication
status due to capturing the Copilot status in a closure. After signing
out, the menu would still show "Sign Out" instead of "Sign In to
Copilot".

This change fixes the issue by reading the current Copilot status each
time the menu is displayed, ensuring the menu options are always
accurate.

Release Notes:

- Fixed Copilot AI menu not updating after sign out

Signed-off-by: Xiaobo Liu <cppcoffee@gmail.com>

crates/edit_prediction_button/src/edit_prediction_button.rs

@@ -132,7 +132,8 @@ impl Render for EditPredictionButton {
                 div().child(
                     PopoverMenu::new("copilot")
                         .menu(move |window, cx| {
-                            Some(match status {
+                            let current_status = Copilot::global(cx)?.read(cx).status();
+                            Some(match current_status {
                                 Status::Authorized => this.update(cx, |this, cx| {
                                     this.build_copilot_context_menu(window, cx)
                                 }),