Initial commit: AetherBags + KamiToolKit for FC Gitea

Co-authored-by: Cursor <cursoragent@cursor.com>

KamiToolKit/Nodes/Layout/HorizontalListNode.cs

@@ -0,0 +1,66 @@
+using System.Linq;
+using KamiToolKit.Enums;
+
+namespace KamiToolKit.Nodes;
+
+public class HorizontalListNode : LayoutListNode {
+
+    public HorizontalListAnchor Alignment {
+        get;
+        set {
+            field = value;
+            RecalculateLayout();
+        }
+    }
+
+    public override float Width {
+        get => base.Width;
+        set {
+            base.Width = value;
+            RecalculateLayout();
+        }
+    }
+    
+    /// <summary>
+    /// Adjusts contained nodes heights to match this nodes height
+    /// </summary>
+    public bool FitHeight { get; set; }
+    
+    /// <summary>
+    /// Resizes the horizontal list node to fit all contents
+    /// </summary>
+    public bool FitToContentHeight { get; set; }
+
+    protected override void OnRecalculateLayout() {
+        var startX = Alignment switch {
+            HorizontalListAnchor.Left => 0.0f + FirstItemSpacing,
+            HorizontalListAnchor.Right => Width - FirstItemSpacing,
+            _ => 0.0f,
+        };
+
+        foreach (var node in NodeList) {
+            if (!node.IsVisible) continue;
+
+            if (Alignment is HorizontalListAnchor.Right) {
+                startX -= node.Width + ItemSpacing;
+            }
+
+            node.X = startX;
+            AdjustNode(node);
+
+            if (Alignment is HorizontalListAnchor.Left) {
+                startX += node.Width + ItemSpacing;
+            }
+            
+            if (FitHeight) {
+                node.Height = Height;
+            }
+        }
+
+        if (FitToContentHeight) {
+            Height = NodeList.Max(node => node.Height);
+        }
+    }
+    
+    public float AreaRemaining => Width - NodeList.Sum(node => node.Width + ItemSpacing) - ItemSpacing;
+}