type: added
area: overlay

- Added a controller binding that shows the secondary subtitle only while a button is held (`controller.bindings.holdSecondarySub`). It is unbound by default; assign it with Learn in the `Alt+C` controller modal. It works with or without keyboard-only mode and does not change the saved secondary subtitle mode.
- Added controller bindings to select the previous or next word entry in the open Yomitan popup (`controller.bindings.previousEntry` / `nextEntry`). Mine Card mines the selected entry. Both are unbound by default; assign them with Learn in the `Alt+C` controller modal.