Add per-projectile player damage reducer

src/game-logic.js

@@ -111,3 +111,24 @@ export const reducePlayerVolleyHits = ({
     gameOver: nextHull <= 0,
   };
 };
+
+export const reducePlayerProjectileHits = ({
+  hull,
+  hits,
+  maxHull = PLAYER_MAX_HULL,
+  fallbackDamage = DEFAULT_PIRATE_SHOT_DAMAGE,
+}) => {
+  const currentHull = Number.isFinite(hull) ? hull : maxHull;
+  const totalDamage = hits.reduce(
+    (sum, hit) => sum + normalizePlayerDamage(hit?.damage, fallbackDamage),
+    0,
+  );
+  const nextHull = Math.max(0, currentHull - totalDamage);
+
+  return {
+    hull: nextHull,
+    totalDamage,
+    appliedHits: hits.length,
+    gameOver: nextHull <= 0,
+  };
+};