fix(macos): a menu-bar command runs at once instead of on the next input (#784)

ROADMAP.md

@@ -129,6 +129,7 @@ list) · [roadmap.md](docs/roadmap.md) (milestones, plan) · [parity-checklist.m
 
 Newest first.
 
+- **2026-10-13** · macOS: a command chosen with the mouse in the menu bar runs at once. It used to wait for the next mouse move or key press over the window, so File › Open, Place and Save As seemed to take 10–20 seconds to open their dialogs. No readiness percentage change.
 - **2026-10-12** · macOS Dock Quit uses the same unsaved-document prompts as window and menu Quit. Repeated requests keep the current answers; Cancel retains every tab and unsaved recovery checkpoint, and completed Save/Don't Save answers exit through the ordinary event loop. No readiness percentage change.
 - **2026-10-12** · Orderly native exit writes the latest recovery state after finalizing current quit approvals; incomplete or stale plans keep their documents, and Undo to the saved state clears stale recovery. Unavailable or failed recovery is reported. Cancelable macOS Dock Quit remains open (#544). No readiness percentage change.
 - **2026-10-12** · Recovered documents keep a checkpoint until saved, closed or reverted, including a second crash before autosave. Restarted document IDs and explicit recovery folders preserve other snapshots; failed republishing retains the original. No readiness percentage change.

apps/designcraft/src/main.rs

@@ -45,7 +45,7 @@ impl eframe::App for App {
         #[cfg(target_os = "macos")]
         {
             if self.menu.is_none() && std::env::var_os("DESIGNCRAFT_NO_NATIVE_MENU").is_none() {
-                self.menu = Some(native_menu::NativeMenu::install(&mut self.app));
+                self.menu = Some(native_menu::NativeMenu::install(&mut self.app, ctx));
             }
             if let Some(m) = &mut self.menu {
                 m.poll(&mut self.app, ctx);

apps/designcraft/src/native_menu.rs

@@ -4,6 +4,7 @@
 
 use std::collections::HashMap;
 use std::str::FromStr;
+use std::sync::mpsc::{Receiver, channel};
 
 use designcraft_ui_egui::DesignApp;
 use designcraft_ui_egui::menus::{self, Item};
@@ -19,6 +20,7 @@ enum Handle {
 pub struct NativeMenu {
     _menu: Menu,
     items: HashMap<String, (String, Value, Handle)>,
+    events: Receiver<MenuEvent>,
     last_refresh: f64,
 }
 
@@ -31,7 +33,15 @@ fn accel(sc: &str) -> Option<Accelerator> {
 }
 
 impl NativeMenu {
-    pub fn install(app: &mut DesignApp) -> Self {
+    pub fn install(app: &mut DesignApp, ctx: &egui::Context) -> Self {
+        // A click in the menu bar reaches the app with no input over the window, so nothing would
+        // draw the frame that runs the command until the pointer or a key comes back: wake egui.
+        let (tx, events) = channel();
+        let repaint = ctx.clone();
+        MenuEvent::set_event_handler(Some(move |e: MenuEvent| {
+            let _ = tx.send(e);
+            repaint.request_repaint();
+        }));
         let menu = Menu::new();
         let mut items = HashMap::new();
         let mut counter = 0usize;
@@ -72,11 +82,11 @@ impl NativeMenu {
                 (p.is_null() && accel(sc).is_some()).then(|| id.clone())
             })
             .collect();
-        Self { _menu: menu, items, last_refresh: 0.0 }
+        Self { _menu: menu, items, events, last_refresh: 0.0 }
     }
 
     pub fn poll(&mut self, app: &mut DesignApp, ctx: &egui::Context) {
-        while let Ok(ev) = MenuEvent::receiver().try_recv() {
+        while let Ok(ev) = self.events.try_recv() {
             if let Some((cmd, params, _)) = self.items.get(ev.id.as_ref()) {
                 menus::activate_native(app, ctx, &cmd.clone(), &params.clone());
             }