feat：完成重构和测试

app/actions/batch.py

@@ -39,13 +39,21 @@ def merge_config(defaults: dict, overrides: dict) -> dict:
 
 
 def complete_add(action: AddAction, catalog: ComponentCatalog) -> AddAction:
-    """按 node.type 找物料补全新增组件，模型显式写出的字段优先，并按物料设置 sample_data"""
+    """按 node.type 找物料补全新增组件，模型显式写出的字段优先
+
+    sample_data 模型写了就以模型为准（只有它知道是否换成了自己的数据），没写时按物料设置
+    """
     material = find_material(catalog, action.node.type)
     if not DATA_BINDING_SUPPORTED and action.node.model_extra.get("dataId"):
         raise ValueError(DATA_BINDING_ERROR)
     overrides = action.node.model_dump(mode="json", exclude_unset=True)
     node = ScreenNode.model_validate(merge_config(material.template(), overrides))
-    return action.model_copy(update={"node": node, "sample_data": material.sample_data})
+    sample_data = (
+        action.sample_data
+        if "sample_data" in action.model_fields_set
+        else material.sample_data
+    )
+    return action.model_copy(update={"node": node, "sample_data": sample_data})
 
 
 def run_batch(