添加气泡布局组件，基于物理仿真的布局组件。

Runtime/BubbleLayout/HorizontalLayoutConstraint.cs

@@ -0,0 +1,82 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace XericUI.BubbleLayout
+{
+	/// <summary>
+	/// 横排布局约束插件 —— 将气泡元素沿 X 轴排列，并通过弹簧力吸附到目标位置。
+	/// </summary>
+	[AddComponentMenu("Xeric UI Vessel/Layout/Horizontal Layout Constraint", 54)]
+	public class HorizontalLayoutConstraint : BubbleLayoutPluginBase, IBubbleConstraintPlugin
+	{
+		[Header("吸附力")]
+		[Tooltip("弹簧吸附力倍率，值越大吸附越快")]
+		[SerializeField] private float m_AttractionForce = 50f;
+
+		[Header("排列")]
+		[Tooltip("排序模式")]
+		[SerializeField] private LayoutSortMode m_SortMode = LayoutSortMode.HierarchyOrder;
+
+		[Tooltip("元素间距")]
+		[SerializeField] private float m_Spacing = 10f;
+
+		[Tooltip("起始偏移（相对于布局中心左侧）")]
+		[SerializeField] private float m_StartOffsetX = 0f;
+
+		[Tooltip("垂直对齐方式：0=顶部, 1=居中, 2=底部")]
+		[Range(0f, 2f)]
+		[SerializeField] private float m_VerticalAlignment = 1f;
+
+		public void ProcessConstraint(List<BubbleItemData> items, Vector2 layoutCenter)
+		{
+			if (items == null || items.Count == 0)
+				return;
+
+			var sorted = new List<BubbleItemData>(items);
+			SortItems(sorted);
+
+			// 计算总宽度
+			float totalWidth = 0f;
+			for (int i = 0; i < sorted.Count; i++)
+				totalWidth += sorted[i].size.x + m_Spacing;
+			totalWidth -= m_Spacing;
+
+			float startX = layoutCenter.x + m_StartOffsetX - totalWidth * 0.5f;
+
+			float currentX = startX;
+			for (int i = 0; i < sorted.Count; i++)
+			{
+				var item = sorted[i];
+
+				// 垂直对齐
+				float alignOffset = (m_VerticalAlignment - 1f) * item.size.y * 0.5f;
+				float targetY = layoutCenter.y - alignOffset;
+
+				Vector2 targetPos = new Vector2(currentX, targetY);
+
+				Vector2 springForce = (targetPos - item.position) * m_AttractionForce;
+				item.force += springForce;
+
+				currentX += item.size.x + m_Spacing;
+			}
+		}
+
+		private void SortItems(List<BubbleItemData> items)
+		{
+			switch (m_SortMode)
+			{
+				case LayoutSortMode.HierarchyOrder:
+					break;
+				case LayoutSortMode.PositionX:
+					items.Sort((a, b) => a.position.x.CompareTo(b.position.x));
+					break;
+				case LayoutSortMode.PositionY:
+					items.Sort((a, b) => b.position.y.CompareTo(a.position.y));
+					break;
+				case LayoutSortMode.Size:
+					items.Sort((a, b) => (b.size.x * b.size.y).CompareTo(a.size.x * a.size.y));
+					break;
+			}
+		}
+	}
+}