When Ghost Counter produces a list of items in the list, it would be great to have a Factory Search option from the GUI to find items in storage (useful before Logistics is researched). See https://github.com/tburrows13/FactorySearch/pull/8

If you aren't already using the Control + Shift + Click hotkey in the mod for something else, you could listen for https://lua-api.factorio.com/latest/events.html#on_gui_click and check those hotkeys on whatever button/sprite is appropriate, and call the FS remote interface at that point. (Control + Shift + Click is the default FS hotkey for clicking on items/recipes/buildings/etc and opening the search at that item, but it doesn't work on sprite-buttons from other mods).