feat: finishing of M0

crates/bds-ui/src/lib.rs

@@ -1,4 +1,4 @@
-mod app;
-mod platform;
+pub mod app;
+pub mod platform;
 
 pub use app::BdsApp;

crates/bds-ui/src/platform/menu.rs

@@ -4,6 +4,10 @@ use muda::{Menu, MenuEvent, MenuItem, PredefinedMenuItem, Submenu};
 use crate::app::Message;
 
 /// Build the native menu bar with standard application menus.
+///
+/// On macOS, also calls `init_for_nsapp()` to register the menu with AppKit.
+/// This requires an active NSApplication, so it will silently fail in
+/// test contexts without one (muda returns an error that we discard).
 pub fn build_menu_bar() -> Menu {
     let menu = Menu::new();
 

crates/bds-ui/tests/app_smoke.rs

@@ -0,0 +1,39 @@
+//! App launch smoke tests.
+//!
+//! M0 validation: verifies that the core UI types can be constructed
+//! and that the message routing works at the type level.
+//!
+//! NOTE: muda::Menu on macOS requires the actual main thread (not just
+//! single-threaded test mode). Menu construction and BdsApp::new() cannot
+//! be tested via `cargo test`. The full smoke test is launching the binary:
+//!   cargo run -p bds-ui
+
+use bds_ui::app::Message;
+
+// ── Smoke: Message enum is well-formed ──
+
+#[test]
+fn message_variants_constructable() {
+    let _noop = Message::Noop;
+    let _menu = Message::MenuEvent(muda::MenuId::new("test"));
+    // Verify Debug trait works
+    assert!(format!("{:?}", Message::Noop).contains("Noop"));
+}
+
+#[test]
+fn message_clone_works() {
+    let msg = Message::MenuEvent(muda::MenuId::new("file-open"));
+    let cloned = msg.clone();
+    assert!(format!("{cloned:?}").contains("MenuEvent"));
+}
+
+// ── Smoke: BdsApp type is accessible from integration tests ──
+
+#[test]
+fn bds_app_type_is_public() {
+    // This test verifies the public API surface exists.
+    // BdsApp, Message, platform::menu are all reachable.
+    fn _assert_types() {
+        let _: fn() -> (bds_ui::BdsApp, iced::Task<Message>) = bds_ui::BdsApp::new;
+    }
+}