initial skeleton

crates/aim-cli/tests/ui_summary.rs

@@ -0,0 +1,7 @@
+use aim_cli::ui::render::render_update_summary;
+
+#[test]
+fn update_summary_mentions_selected_count() {
+    let output = render_update_summary(3, 2, 1);
+    assert!(output.contains("selected: 2"));
+}