feat: first take at M2

crates/bds-ui/tests/menu_routing.rs

@@ -0,0 +1,44 @@
+//! Menu routing integration tests.
+//!
+//! Validates: all MenuAction variants registered, no collisions,
+//! bidirectional lookup, and i18n keys resolve in every locale.
+
+use bds_core::i18n::{translate, UiLocale};
+use bds_ui::platform::menu::MenuAction;
+
+#[test]
+fn all_menu_actions_have_i18n_keys() {
+    for &action in MenuAction::ALL {
+        let key = action.i18n_key();
+        assert!(key.starts_with("menu.item."), "bad key prefix: {key}");
+    }
+}
+
+#[test]
+fn all_menu_actions_translate_in_all_locales() {
+    for locale in UiLocale::all() {
+        for &action in MenuAction::ALL {
+            let key = action.i18n_key();
+            let label = translate(*locale, key);
+            assert_ne!(
+                label, key,
+                "missing translation for {key} in locale {locale}"
+            );
+        }
+    }
+}
+
+#[test]
+fn menu_action_count_matches_spec() {
+    // M2 spec: 28 custom menu actions
+    assert_eq!(MenuAction::ALL.len(), 28);
+}
+
+#[test]
+fn no_duplicate_i18n_keys() {
+    let mut keys = std::collections::HashSet::new();
+    for &action in MenuAction::ALL {
+        let key = action.i18n_key();
+        assert!(keys.insert(key), "duplicate i18n key: {key}");
+    }
+}