Changelog

1.2.1

Fixed stations on the tree and items in the station list only appearing near the top-left corner or after scrolling (the off-screen culling added in 1.2.0 is removed; the scroll mask already skips hidden elements).
Scrollbar handles reworked so they are always drawn; the first open writes scrollbar sizes to the log for troubleshooting.

New branches: Capes and Trinkets (pauldrons that belong to an armor set stay in Armor).
Fixed Refinement Forge upgrade materials (protection idols) showing up as crafting ingredients and pushing items into the wrong era.
Sorting from weakest to strongest is now by era first, then armor before shields, then stats, so early shields no longer end up after black metal armor.
Armor sets without a set bonus (e.g. vanilla Iron, Southsil Battleswine) are kept together, in the order helmet, chest, legs, pauldrons.
Bombs and staffs from alchemy/magic tables (potion cauldrons, wizard tables...) are no longer listed under Weapons.
"Other sources" no longer repeats items that already have a recipe (duplicated vanilla staffs); items there count as discovered only once you have picked them up.
Scrollbars have a visible, draggable handle; clicking the track jumps there.
Smooth mouse-wheel scrolling; rows and stations outside the view are skipped while scrolling, and the game world is not rendered while the tree is open (configurable) for a much higher frame rate.
Branch header: the discovered counter sits right under the branch name; section headers are centered.

Interface is now in English.
Always-visible scrollbars: vertical and horizontal on the tree map, vertical on the station list and the search list.
Mouse wheel scrolls at a normal speed (fixed step per notch); Shift + wheel scrolls the map sideways.
Hover highlight on stations, rows and buttons, and a hand cursor over clickable elements.
Much smoother scrolling and dragging: the map and the list use their own canvases and long texts no longer carry an outline effect.
Fixed tooltip lines using <size=..%> (e.g. from NameThis) showing as huge text.

Fixed the tree window collapsing to nothing (only the buttons were visible), so stations and recipes now show.
Station search moved to the bottom-left corner of the window; the list opens upwards.

Initial release: full-screen progression tree opened from the inventory, five branches (weapons, magic, armor, food, potions), crafting stations ordered by era, station search, discovered/undiscovered lists, stat-based sorting with sets kept together, and an "Other sources" section for items without a recipe.