feat: 完成后端处理链路、优化部分提示词

app/processor/graph.py

@@ -176,6 +176,7 @@ def build_graph(checkpointer=None):
                 ("app.schemas.screen_plan", "ScreenPlan"),
                 ("app.schemas.component_resource", "ComponentResult"),
                 ("app.schemas.actions.add", "AddAction"),
+                ("app.schemas.actions.delete", "DeleteAction"),
                 ("app.schemas.actions.move", "MoveAction"),
                 ("app.schemas.actions.resize", "ResizeAction"),
                 ("app.schemas.actions.update", "UpdateAction"),

app/processor/nodes/action_node.py

@@ -20,7 +20,7 @@ def can_generate_actions(state: QueryState) -> bool:
         return plan_block_reason(state) is None
     requirement = state["requirement"]
     scope = state["change_scope"]
-    # 当前只接入三种已有组件操作，后续能力逐步扩展
+    # 简单操作直接生成动作，复杂变更走规划分支
     return (
         requirement.intent == "modify_screen"
         and not requirement.needs_clarification
@@ -34,6 +34,7 @@ def can_generate_actions(state: QueryState) -> bool:
                 "move",
                 "resize",
                 "update",
+                "delete",
             )
             for change in requirement.changes
         )
@@ -59,7 +60,7 @@ class ActionNode(BaseNode):
             return updated_state
         if not can_generate_actions(state):
             raise ValueError(
-                "ActionNode 当前只支持无需规划和资源的 move、resize、update 需求"
+                "ActionNode 当前只支持无需规划和资源的 move、resize、update、delete 需求"
             )
         payload = {
             "input_context": state["input_context"].model_dump(mode="json"),