feat: 完成后端处理链路、优化部分提示词

app/schemas/actions/__init__.py

@@ -6,13 +6,15 @@ from pydantic import Field, TypeAdapter
 
 from .add import AddAction
 from .base import ActionModel, BaseAction
+from .delete import DeleteAction
 from .move import MoveAction
 from .resize import ResizeAction
 from .update import UpdateAction
 
 # 按 type 选择对应模型，不维护重复的操作名称映射
 Action = Annotated[
-    AddAction | MoveAction | ResizeAction | UpdateAction, Field(discriminator="type")
+    AddAction | DeleteAction | MoveAction | ResizeAction | UpdateAction,
+    Field(discriminator="type"),
 ]
 action_adapter = TypeAdapter(Action)
 
@@ -26,6 +28,7 @@ __all__ = [
     "ActionBatch",
     "AddAction",
     "BaseAction",
+    "DeleteAction",
     "MoveAction",
     "ResizeAction",
     "UpdateAction",