Build 0.7.6: Supply Window & Ranged Engagement Update — War Room: Tactical Sandbox Steam update #1316043

\ ● What It Is: the Supply Options Window is a small panel that opens (F7 key) on a unit within range of an active supply chain, letting you toggle on/off whether that specific unit accepts healing, fatigue recovery, and ammo resupply from the chain. ● Free-Space Search: the window no longer always opens at a fixed offset from the unit. It now scans in a circle around the selected unit, at growing radii, looking for a spot that does not overlap the unit itself or any nearby troop/object. ● Concealment-Aware: locked/concealed objects (used by the Unit Concealed system) are ignored by the positioning search, since they aren't clickable through normal means anyway. \ ● Vision-Gated Auto-Fire: ranged units no longer auto-engage enemies they cannot actually see. If a unit's weapon range exceeds its vision radius, it will not fire on its own at anything beyond what it can visually detect — reg...