UI相关优化补充

Assets/_Game/Scripts/UI/Theme/UIThemeRole.cs

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+using UnityEngine;
+
+namespace BaseGames.UI.Theme
+{
+    /// <summary>主题角色种类。控制 <see cref="UIThemeApplier"/> 应用何种令牌到目标组件。</summary>
+    public enum UIThemeRoleKind
+    {
+        // Graphic（Image / RawImage / Panel 等）
+        Graphic_Primary,
+        Graphic_Secondary,
+        Graphic_Accent,
+        Graphic_Background,
+        Graphic_Success,
+        Graphic_Warning,
+        Graphic_Danger,
+
+        // TMP_Text
+        Text_Primary,
+        Text_Secondary,
+        Text_Header,
+        Text_Disabled,
+
+        // Button（应用 ColorBlock）
+        Button,
+    }
+
+    /// <summary>
+    /// 标记组件：告诉 <see cref="UIThemeApplier"/> 当前节点扮演的视觉角色。
+    /// </summary>
+    [DisallowMultipleComponent]
+    public class UIThemeRole : MonoBehaviour
+    {
+        [SerializeField] private UIThemeRoleKind _kind = UIThemeRoleKind.Text_Primary;
+        [SerializeField] private bool _overrideFontSize = false;
+
+        public UIThemeRoleKind Kind => _kind;
+        public bool OverrideFontSize => _overrideFontSize;
+    }
+}