fix: ensure set_window_effects runs on main thread in WindowBuilder (#13422) (#13423)

Co-authored-by: Tony <68118705+Legend-Master@users.noreply.github.com>

Author: kingsword09

.changes/fix-set-window-effects-main-thread.md

@@ -0,0 +1,5 @@
+---
+"tauri": "patch:bug"
+---
+
+Fixed set_window_effects not runs on main thread in WindowBuilder.

crates/tauri/src/window/mod.rs

@@ -406,14 +406,14 @@ tauri::Builder::default()
       window.on_menu_event(handler);
     }
 
-    if let Some(effects) = self.window_effects {
-      crate::vibrancy::set_window_effects(&window, Some(effects))?;
-    }
-
     let app_manager = self.manager.manager_owned();
     let window_label = window.label().to_string();
+    let window_ = window.clone();
     // run on the main thread to fix a deadlock on webview.eval if the tracing feature is enabled
     let _ = window.run_on_main_thread(move || {
+      if let Some(effects) = self.window_effects {
+        _ = crate::vibrancy::set_window_effects(&window_, Some(effects));
+      }
       let event = crate::EventName::from_str("tauri://window-created");
       let payload = Some(crate::webview::CreatedEvent {
         label: window_label,