A nice to have would be the ability to see where your gil is as well. (on you, your retainer, or the moogle mailbox).

So why did I bother separating a few things into "special guests"? Because I expect those particular systems to be complicated or impossible because of how they might work behind the scenes.

The UI may need some adjustments to accommodate the new use case, but the general idea feels like it is mostly done. There is already the ability to narrow the scope by level for gear. You can browse or search by text.

If sorting were to be adding, sorting by item name and item ilevel makes sense. Maybe stack quantity, but I'm not sure how useful that would be. Maybe sort by slot for gear.

I think this, or something in the spirit of this, would be a great enhancement to the quality of life. This could even be used as graphical result for "search for item" to supplement what shows in the chat log.