fix：处理模型错误添加大量文本的bug

app/actions/batch.py

@@ -8,7 +8,12 @@ from copy import deepcopy
 from app.actions.layout import EXPANDERS
 from app.actions.registry import apply_action
 from app.actions.update import fit_existing_path, same_value
-from app.resources.material_fields import check_update_field, find_material
+from app.resources.material_fields import (
+    check_add_fields,
+    check_update_field,
+    find_material,
+    retained_examples,
+)
 from app.schemas.actions import Action, AddAction, AgentAction, UpdateAction
 from app.schemas.capabilities import DATA_BINDING_ERROR, DATA_BINDING_SUPPORTED
 from app.schemas.component_resource import ComponentCatalog
@@ -45,19 +50,38 @@ 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
 
-    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
+    显式写的字段先按字段定义检查，和 update 是同一套规则；sample_data 保持模型的声明，
+    交付时再由 mark_sample_data 按组件上是否还有示例数据补上
     """
     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)
+    check_add_fields(catalog, material.type, overrides)
     node = ScreenNode.model_validate(merge_config(material.template(), overrides))
-    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})
+    return action.model_copy(update={"node": node})
+
+
+def mark_sample_data(
+    actions: list[Action], screen: Screen, catalog: ComponentCatalog | None
+) -> list[Action]:
+    """交付前给新增组件定 sample_data：模型声明了自己编的数据，或者组件上还留着物料的示例数据
+
+    按交付后的大屏判断，不管数据是新增时写的、之后用 update 换的，还是 $query 查来的；
+    后来被删掉的组件保持模型的声明。只改动作上的标记，交付记录依次执行仍得到同一个大屏
+    """
+    nodes = {node.id: node for node in screen.nodes}
+    result = []
+    for action in actions:
+        if isinstance(action, AddAction) and not action.sample_data:
+            node = nodes.get(action.node.id)
+            if node is not None and any(
+                field.example == "data"
+                for field, _ in retained_examples(catalog, node.model_dump(mode="json"))
+            ):
+                action = action.model_copy(update={"sample_data": True})
+        result.append(action)
+    return result
 
 
 def misplaced_props(actions: list[AgentAction], catalog: ComponentCatalog) -> list[str]: