Click target for a help-bar hint or for the prestige-reset confirm
line. Mirrors the keyboard shortcuts so the mouse-first player has
equivalent reach to every action a key would fire.
Which action a clickable button in the tree-modal info pane fires.
Buy / Refund both target the cursor’s lot; the renderer publishes
at most one of these per frame (whichever the focused node currently
supports). Left-click on the rect emits the corresponding sim
action, giving touch / left-click-only players parity with the
right-click-on-node gesture.