Add per-broadside player damage reducer

src/game-logic.js

@@ -67,3 +67,47 @@ export const processQueuedPlayerHits = ({
     maxHull,
   });
 };
+
+export const reducePlayerVolleyHits = ({
+  hull,
+  hits,
+  seenVolleyIds = [],
+  maxHull = PLAYER_MAX_HULL,
+  fallbackDamage = DEFAULT_PIRATE_SHOT_DAMAGE,
+  maxSeenVolleys = 128,
+}) => {
+  const seen = new Set(seenVolleyIds);
+  const acceptedHits = [];
+  const ignoredHits = [];
+  let totalDamage = 0;
+
+  for (const hit of hits) {
+    const volleyId = hit?.volleyId ?? null;
+
+    if (volleyId !== null && seen.has(volleyId)) {
+      ignoredHits.push(hit);
+      continue;
+    }
+
+    if (volleyId !== null) seen.add(volleyId);
+    acceptedHits.push(hit);
+    totalDamage += normalizePlayerDamage(hit?.damage, fallbackDamage);
+  }
+
+  while (seen.size > maxSeenVolleys) {
+    const oldest = seen.values().next().value;
+    seen.delete(oldest);
+  }
+
+  const currentHull = Number.isFinite(hull) ? hull : maxHull;
+  const nextHull = Math.max(0, currentHull - totalDamage);
+
+  return {
+    hull: nextHull,
+    totalDamage,
+    acceptedHits,
+    ignoredHits,
+    seenVolleyIds: seen,
+    gameOver: nextHull <= 0,
+  };
+};