Everything related to chat functionality, and updating the projectile prefab to rotate properly

Assets/_Project/Scripts/Gameplay/WaveManager.cs

@@ -387,8 +387,20 @@ namespace TD.Gameplay
         private void ShowLifeLossClientRpc(Vector3 worldPos, int amount)
         {
             FloatingTextSpawner.Instance?.SpawnLifeLoss(worldPos, amount);
+            OnLifeLost?.Invoke(amount);
         }
 
+        // ----- Local-only notification events -----------------------------
+
+        /// <summary>
+        /// Fired on every peer immediately after a life-loss popup spawns.
+        /// HUD subscribes to flash a centered banner; gameplay code can also
+        /// hook this for audio cues, screen-shake, etc. Argument is the number
+        /// of lives lost (usually 1, but boss enemies with LivesCost &gt; 1
+        /// fire a single event carrying the larger value).
+        /// </summary>
+        public static event System.Action<int> OnLifeLost;
+
         // ----- Helpers ----------------------------------------------------
 
         private void UnsubscribeEnemy(EnemyHealth health)