WIP: Water animation system - added frame initialization and update loop (debugging in progress)

src/scenes/GameScene.js

@@ -803,8 +803,10 @@ class GameScene extends Phaser.Scene {
         }
 
         // Terrain system update (za water animacijo)
-        if (this.terrainSystem) {
+        if (this.terrainSystem && this.terrainSystem.update) {
             this.terrainSystem.update(Date.now(), delta);
+        } else {
+            console.warn('⚠️ TerrainSystem.update not available!');
         }
     }
 }