fix(system): drop frontend taskRows sort; rely on backend started_at order

reaction_board/web/static/views/system.js

@@ -6,16 +6,8 @@ import {
 } from "../format.js";
 
 function taskRows(tasks) {
-  const entries = Object.entries(tasks || {}).sort((a, b) => {
-    const sa = Number(a[1] && a[1].started_at);
-    const sb = Number(b[1] && b[1].started_at);
-    const aOk = Number.isFinite(sa);
-    const bOk = Number.isFinite(sb);
-    if (aOk && bOk) return sb - sa;
-    if (aOk) return -1;
-    if (bOk) return 1;
-    return String(a[0]).localeCompare(String(b[0]));
-  });
+  // Order comes from backend (_task_records started_at DESC); do not re-sort here.
+  const entries = Object.entries(tasks || {});
   if (!entries.length) return emptyState("暂无任务记录", "运行一次同步、快照或发现后会写入最近结果。");
   return `<div class="table-wrap">
     <table class="data-table">