Add ammo counter for ranged items in quickslot

src/scenes/systems/ItemManager.ts

@@ -37,12 +37,18 @@ export class ItemManager {
   spawnItem(item: Item, pos: Vec2): void {
     if (!this.world || !this.entityManager) return;
     
+    // Deep clone item (crucial for items with mutable stats like ammo)
+    const clonedItem = { ...item } as Item;
+    if ('stats' in clonedItem && clonedItem.stats) {
+        (clonedItem as any).stats = { ...clonedItem.stats }; 
+    }
+
     const id = this.entityManager.getNextId();
     const drop: ItemDropActor = {
       id,
       pos: { x: pos.x, y: pos.y },
       category: "item_drop",
-      item: { ...item } // Clone item
+      item: clonedItem
     };
     
     this.entityManager.addActor(drop);
@@ -61,7 +67,20 @@ export class ItemManager {
     if (itemActor) {
       const item = itemActor.item;
       
+      // Stacking Logic
+      if (item.stackable) {
+          const existingItem = player.inventory.items.find(it => it.id === item.id);
+          if (existingItem) {
+              existingItem.quantity = (existingItem.quantity || 1) + (item.quantity || 1);
+              console.log(`Stacked ${item.name}. New quantity: ${existingItem.quantity}`);
+              
+              this.entityManager.removeActor(itemActor.id);
+              return existingItem;
+          }
+      }
+
       // Add to inventory
+      item.quantity = item.quantity || 1;
       player.inventory.items.push(item);
       
       // Remove from world
@@ -91,7 +110,7 @@ export class ItemManager {
     const item = player.inventory.items[itemIdx];
 
     // Check if item is a healing consumable
-    if (item.stats && item.stats.hp && item.stats.hp > 0) {
+    if (item.type === "Consumable" && item.stats?.hp) {
       const healAmount = item.stats.hp;
       
       if (player.stats.hp >= player.stats.maxHp) {
@@ -100,8 +119,12 @@ export class ItemManager {
 
       player.stats.hp = Math.min(player.stats.hp + healAmount, player.stats.maxHp);
       
-      // Remove item after use
-      player.inventory.items.splice(itemIdx, 1);
+      // Consume item (check stack)
+      if (item.quantity && item.quantity > 1) {
+          item.quantity--;
+      } else {
+          player.inventory.items.splice(itemIdx, 1);
+      }
       
       return { 
         success: true, 
@@ -110,8 +133,8 @@ export class ItemManager {
       };
     }
 
-    // Throwable items are handled by TargetingSystem, not here
-    if (item.throwable) {
+    // Throwable items
+    if (item.type === "Consumable" && item.throwable) {
       return { 
         success: true, 
         consumed: false,