fix: preserve video selection order for playback

tests/unit/app.rs

@@ -68,7 +68,7 @@ fn app(args: &[&str]) -> App {
 }
 
 #[test]
-fn playback_checks_follow_ids_across_feed_sort_and_clear_on_replacement() {
+fn playback_checks_preserve_check_order_across_feed_sort_and_clear_on_replacement() {
     let mut app = app(&["tubular"]);
     app.view_index = 1;
     app.feed_channels = vec!["https://www.youtube.com/@fixture".into()];
@@ -87,7 +87,7 @@ fn playback_checks_follow_ids_across_feed_sort_and_clear_on_replacement() {
             .iter()
             .map(|video| video.id.as_str())
             .collect::<Vec<_>>(),
-        ["rQ_J9WH6CGk", "jNQXAC9IVRw"],
+        ["jNQXAC9IVRw", "rQ_J9WH6CGk"],
     );
     finish_feed_fixture(
         &mut app,
@@ -96,6 +96,16 @@ fn playback_checks_follow_ids_across_feed_sort_and_clear_on_replacement() {
     );
     let view = &mut app.views[1];
     assert_eq!(view.selection.selected(), Some(1));
+    assert_eq!(
+        view.playback_videos()
+            .iter()
+            .map(|video| video.id.as_str())
+            .collect::<Vec<_>>(),
+        ["jNQXAC9IVRw", "rQ_J9WH6CGk"],
+    );
+    view.selection.select(Some(2));
+    view.toggle_checked();
+    view.toggle_checked();
     assert_eq!(
         view.playback_videos()
             .iter()
@@ -251,7 +261,7 @@ fn playback_checks_survive_spawn_failure_clear_after_spawn_and_fall_back_to_hove
         app.options.player = "/nonexistent/tubular-test-player".into();
         app.key(KeyEvent::new(KeyCode::Enter, modifiers));
         assert!(app.player_launch.is_none());
-        assert!(app.views[0].checked.contains("rQ_J9WH6CGk"));
+        assert!(app.views[0].checked.iter().any(|id| id == "rQ_J9WH6CGk"));
         assert_eq!(app.views[0].playback_videos()[0].id, "rQ_J9WH6CGk");
         app.options.player = "/usr/bin/true".into();
         app.key(KeyEvent::new(KeyCode::Enter, modifiers));
@@ -6069,7 +6079,7 @@ fn escape_discards_checks_without_consuming_view_history() {
     app.views[0].loaded = true;
     app.views[1].loaded = true;
     app.switch_view(1);
-    app.views[1].checked.insert("jNQXAC9IVRw".into());
+    app.views[1].checked.push("jNQXAC9IVRw".into());
     app.key(KeyEvent::new(KeyCode::Esc, KeyModifiers::NONE));
     assert!(app.views[1].checked.is_empty());
     assert_eq!(app.view_index, 1);