refactoring (broken right now)

Interfaces/IComponent.cs

@@ -0,0 +1,19 @@
+using System.Collections.Generic;
+
+namespace FluidSim.Interfaces
+{
+    /// <summary>
+    /// Minimal interface for all simulation components that have ports.
+    /// </summary>
+    public interface IComponent
+    {
+        /// <summary>All ports exposed by this component.</summary>
+        IReadOnlyList<Port> Ports { get; }
+
+        /// <summary>
+        /// Called once per global time step to update the component's internal state
+        /// using the port flow data accumulated during sub‑steps.
+        /// </summary>
+        void UpdateState(double dt);
+    }
+}