perf(schedule): 减少重渲染与冗余动画

- useCanvasNodeDrag.moveDrag 改 ref 直改 DOM,松手才写 store,避免拖拽期间反复重渲染 SchedulePage
- runs 轮询改 setTimeout 链式 + 移除 runs 依赖,避免每 1.5s 重建 interval
- SchedulePage 拆 PositionDraftBadge / RunNowButton,删除冗余的 runs/runsLoading/positionDraftCount 订阅
- 拆 ScheduleEdge 组件 + React.memo + useMemo,切换 edge 选中时不再重算所有 edgePath
- 删除 schedule.css 中引用未定义 keyframes 的 modal-in/spin 死动画
- 删除 .schedule-edge-line transition、.schedule-run-result-backdrop backdrop-filter;补 .artifact-card transition

Refs: kaneo #19-#24

frontend/app/features/schedules/RunHistory.tsx

@@ -2,7 +2,6 @@ import { useEffect } from "react";
 
 import {
   type ScheduleNode,
-  type ScheduleRunSummary,
 } from "../../services/api";
 
 import { useApi } from "../../context/AuthContext";
@@ -18,19 +17,17 @@ import {
 } from "./utils";
 
 export function RunHistory({
-  runs,
   nodes,
-  loading,
   disabled,
   onRefresh,
 }: {
-  runs: ScheduleRunSummary[];
   nodes: ScheduleNode[];
-  loading: boolean;
   disabled: boolean;
   onRefresh: () => void;
 }) {
   const api = useApi();
+  const runs = useSchedulesStore((s) => s.runs);
+  const loading = useSchedulesStore((s) => s.runsLoading);
   const expandedRunId = useSchedulesStore((s) => s.expandedRunId);
   const runDetails = useSchedulesStore((s) => s.runDetails);
   const detailLoadingId = useSchedulesStore((s) => s.detailLoadingId);