Gear

Gear's part in quest reward choices: QoL, "Quest reward marks".

Bag upgrade arrows — Gear/Bags.lua#

Polestar.Gear.Bags.IsUpgrade(link) -> bool   -- what an arrow shows: Gear.IsUpgrade, with gear advice and gear.bagArrows on
Polestar.Gear.Bags.Redraw()                  -- repaint the shown bags; GEAR_UPDATED schedules it, at most every 0.2 s

• The client's bags.Each container frame's UpdateItems (Mainline ContainerFrame.lua, which Forever loads) is post-hooked on the frame itself: ContainerFrameContainer.ContainerFrames and ContainerFrameCombinedBags. The mixin's functions are copied onto each frame as it is made, so a hook on ContainerFrameMixin would miss them. The arrow (qol-upgrade, success, 20px) is a texture on the item button, top-left where the client's own unused UpgradeIcon sits, at OVERLAY sublevel 3: over the icon overlays, under the search overlay, so a bag search dims it with the icon. Textures only (the gamepad interface hooks CreateFrame, not CreateTexture), and nothing is written into the button's table: Bags.lua keeps the arrows by button. A closed bag is repainted by the client's own update as it opens.
• Baganator.A corner widget (Baganator.API.RegisterCornerWidget, id polestar_upgrade, top-left at priority 1, the way Baganator shows Pawn's arrow), registered as Bags.lua loads or on Baganator's ADDON_LOADED. New verdicts ask it for an item-widget refresh (RequestItemButtonsRefresh). Baganator also shows other characters' bags; the arrow there is this character's verdict, as the tooltip line is.
• Other bag addons draw their own buttons and get no arrow; the tooltip line still shows on them.