Update the vacuum projectile logic

Assets/Scripts/Core/Settings/SettingsInterfaces.cs

@@ -272,6 +272,7 @@ namespace Core.Settings
         // Physics Layers
         int FortBlockLayer { get; }     // Layer index for fort blocks
         int ProjectileLayer { get; }    // Layer index for projectiles
+        int GroundLayer { get; }        // Layer index for ground/floor (used by vacuum projectile)
         
         // Projectile Abilities
         float VacuumSlideSpeed { get; }  // Constant velocity for vacuum sliding (m/s)