fix(agent): Agent 运行 - 截断工具参数纠偏重试并修复 ask_user 后续跑与清单状态

模型返回不完整的工具参数 JSON 时，Pi 桥接带 truncated_tool_arguments 纠偏上下文重做同一步，不再把整轮判为中断。ask_user 进入提问后结束本轮 Pi 调用；续轮会话快照缺失时改用服务端 canonical 历史。继承的待办清单挂到新一轮，等待用户确认时清单显示暂停而非停止。

web/src/components/canvas/canvas-cloud-agent-panel.tsx

@@ -1032,6 +1032,7 @@ export function CanvasCloudAgentPanel({ canvasId, domainProjectId, nodeCount, se
                                             theme={theme}
                                             minimized={planMinimized}
                                             terminal={planTerminal || Boolean(run && ["completed", "failed", "cancelled", "rejected"].includes(run.status))}
+                                            waitingUser={Boolean(pendingQuestion)}
                                             onToggle={() => setPlanMinimized((value) => !value)}
                                         />
                                     ) : null}