feat: 2.5s lockout before dropped weapons can be re-picked

js/pickups.js

@@ -117,7 +117,7 @@ function collectPickup(k) {
       if (old) {
         const a = rand(0, TAU);
         spawnPickup('weapon', p.x + Math.cos(a) * 34, p.y + Math.sin(a) * 34,
-          { wid: old.id, ammo: old.ammo, delay: 0.6 });
+          { wid: old.id, ammo: old.ammo, delay: WEAPON_DROP_LOCKOUT });
       }
       p.weapon = { id: w.id, ammo: k.ammo !== undefined ? k.ammo : w.ammo };
       p.holstered = null;

js/state.js

@@ -59,6 +59,8 @@ const PERK_POWER_WEIGHT = 0.5;
 // ammo economy: global dial for drop frequency (refill size is per-weapon)
 const AMMO_DROP_SCALE = 0.75;
 const PRESSURE_MIN = 0.60, PRESSURE_MAX = 2.00;
+// seconds a player-dropped weapon stays un-pickable (prevents instant swap loops)
+const WEAPON_DROP_LOCKOUT = 2.5;
 const PRESSURE_UNIT = 0.01;          // one "point" on the dial scale
 const PRESSURE_GAIN = PRESSURE_UNIT; // retained: dial 0 == 1 point
 const PRESSURE_DROP_BASE = 3;        // dial 0 == 0.03 relief base