docs: document data-management skill button order via actions array

assets/schemas/skill-actions.schema.json

@@ -19,7 +19,8 @@
     "actions": {
       "type": "array",
       "minItems": 1,
-      "items": { "$ref": "#/$defs/action" }
+      "items": { "$ref": "#/$defs/action" },
+      "description": "Action 列表。同一 placement（toolbar/row/batch）下，宿主按本数组中匹配项的相对顺序渲染技能按钮；调整顺序即调整数组先后。无独立 sortOrder 字段。宿主内置刷新/导出/查看等不参与本顺序。"
     }
   },
   "$defs": {
@@ -166,7 +167,7 @@
           "type": "array",
           "minItems": 0,
           "items": { "$ref": "#/$defs/placement" },
-          "description": "决定 Action 出现在哪里；与 executionProfile 正交。仅 replaces 接管默认 CRUD 时可为空数组。"
+          "description": "决定 Action 出现在哪里；与 executionProfile 正交。仅 replaces 接管默认 CRUD 时可为空数组。数据管理 toolbar/row/batch 的按钮顺序由顶层 actions 数组相对顺序决定，不在本字段配置排序。"
         },
         "replaces": { "$ref": "#/$defs/mutationKind" },
         "entrypoint": { "$ref": "#/$defs/entrypoint" },