feat: 添加判断修改范围、规划和资源需求节点

app/actions/registry.py

@@ -0,0 +1,25 @@
+"""显式注册动作处理器"""
+
+from typing import Any
+
+from app.actions.base import BaseActionHandler
+from app.actions.move import MoveHandler
+from app.actions.resize import ResizeHandler
+from app.actions.update import UpdateHandler
+from app.schemas.actions import Action
+from app.schemas.screen import Screen
+
+# 新增操作时在此注册，未实现的操作明确报错
+ACTION_HANDLERS: dict[str, BaseActionHandler[Any]] = {
+    "move": MoveHandler(),
+    "resize": ResizeHandler(),
+    "update": UpdateHandler(),
+}
+
+
+def apply_action(screen: Screen, action: Action) -> Screen:
+    """接收已通过 Schema 校验的动作，返回执行后的副本"""
+    handler = ACTION_HANDLERS.get(action.type)
+    if handler is None:
+        raise ValueError(f"尚未实现动作处理器: {action.type}")
+    return handler.apply(screen, action)