Reorganize scripts into subfolders by responsibility

Move scripts under Assets/Scripts/ into Components, GameMode, Helper,
Network, Enum, Struct and ScriptableObject folders. Pure file moves
(plus folder .meta files); no code changes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scripts/Components/UI/UiPointerSurface.cs

@@ -0,0 +1,39 @@
+using System;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+/// <summary>
+/// Turns a pointer press/drag on a UI graphic into a normalized (x, y) position in
+/// [0,1] within its RectTransform (origin bottom-left). Added in code to the colour
+/// picker's saturation/value field and hue bar so they react to both clicking and
+/// dragging. The graphic on the same object must be a raycast target.
+/// </summary>
+[RequireComponent(typeof(RectTransform))]
+public class UiPointerSurface : MonoBehaviour, IPointerDownHandler, IDragHandler
+{
+    /// <summary>Fired on press and while dragging with the normalized (x, y) in [0,1].</summary>
+    public event Action<Vector2> Picked;
+
+    private RectTransform _rect;
+
+    private void Awake() => _rect = (RectTransform)transform;
+
+    public void OnPointerDown(PointerEventData eventData) => Report(eventData);
+    public void OnDrag(PointerEventData eventData) => Report(eventData);
+
+    private void Report(PointerEventData eventData)
+    {
+        // pressEventCamera is null for a Screen Space - Overlay canvas, which is the
+        // correct camera argument there.
+        if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(
+                _rect, eventData.position, eventData.pressEventCamera, out Vector2 local))
+            return;
+
+        Rect r = _rect.rect;
+        if (r.width <= 0f || r.height <= 0f) return;
+
+        float x = Mathf.Clamp01((local.x - r.xMin) / r.width);
+        float y = Mathf.Clamp01((local.y - r.yMin) / r.height);
+        Picked?.Invoke(new Vector2(x, y));
+    }
+}