Added the Lackey Satchel system with a 5-tier book hotbar and carrying limits.
Added manual book placement mode: pick up books into the satchel first, then select a tier to place books on shelves.
Added Lackey Outfitter with Ink upgrades for satchel capacity and movement speed.
Added Lackey Binder for batch book upgrades with timed crafting and manual claiming.
Improved book pickup and shelf placement flow to make organizing shelves easier.
Improved the hotbar, Lackey Outfitter, Lackey Binder, and Ledger UI.
Improved save/load support for new satchel, upgrade, and binder progress.
Fixed missing UI icons in the published version.
Fixed hotbar visibility while the Ledger is open.
Fixed several interaction issues around placement previews, outlines, and upgrade claiming.
Removed the old single-book upgrade table flow in favor of the new Lackey Binder system.
We are still tuning upgrade costs, pacing, and UI polish based on player feedback.