定时任务 Cron 表达式支持（工作区遗留改动收尾）

- TestSchedule 新增可选 5 段 cron（分 时 日 月 周，本地时区），优先于 intervalMinutes；runLog 调度日志
- cron.ts 解析与匹配引擎 + 单测；scheduler 按最近下次触发时间调度
- ScheduleDialog / TestingView 支持 cron 输入与下次运行提示；AiCaseDialog 微调
- 服务端 internal/echo 调试回显端点；修复 model.ts 注释内 */ 导致的语法错误
- 全量 53 前端用例绿

packages/ui/src/components/TestingView.tsx

@@ -13,7 +13,10 @@ import type {
 } from "@opsxapi/core";
 import {
   ASSERT_OP_LABELS,
+  createSeedWorkspace,
+  exportRunJson,
   exportRunMarkdown,
+  isValidCron,
   newAssertion,
   newExtract,
   newStep,
@@ -54,6 +57,38 @@ function useHttpNodeOptions(): { id: string; label: string; method: string }[] {
   }, [collections]);
 }
 
+
+const REGRESSION_CASE_ID = "tc-opsx-http8-regression";
+
+/** 装载 / 刷新本地 Gin echo 八组合回归用例（不整库清空） */
+function installHttp8Regression(): string {
+  const seed = createSeedWorkspace();
+  const state = useWorkspace.getState();
+  const seedCase = seed.testCases.find((c) => c.id === REGRESSION_CASE_ID) ?? seed.testCases[0]!;
+  const localEnv = seed.environments.find((e) => e.name === "本地") ?? seed.environments[0];
+  const hasCase = state.testCases.some((c) => c.id === REGRESSION_CASE_ID);
+  const hasCollection = state.collections.some((c) => c.name === "示例集合");
+  const localExisting = state.environments.find((e) => e.name === "本地");
+  state.loadWorkspaceData({
+    version: 2,
+    collections: hasCollection
+      ? state.collections.map((c) => (c.name === "示例集合" ? seed.collections[0]! : c))
+      : [...state.collections, ...seed.collections],
+    environments: localExisting
+      ? state.environments
+      : [...state.environments, ...seed.environments.filter((e) => e.name === "本地")],
+    activeEnvironmentId: localExisting?.id ?? localEnv?.id ?? state.activeEnvironmentId,
+    history: state.history,
+    settings: state.settings,
+    testCases: hasCase
+      ? state.testCases.map((c) => (c.id === REGRESSION_CASE_ID ? seedCase : c))
+      : [...state.testCases, seedCase],
+    testRuns: state.testRuns,
+    schedules: state.schedules,
+  });
+  return seedCase.id;
+}
+
 export function TestingView() {
   const testCases = useWorkspace((s) => s.testCases);
   const testRuns = useWorkspace((s) => s.testRuns);
@@ -96,6 +131,13 @@ export function TestingView() {
               <Icon name="bot" size={13} /> AI 生成
             </button>
           </div>
+          <button
+            className="ops-btn ops-btn-secondary mt-1.5 w-full !px-2"
+            title="装载本地 Gin /v1/echo 八组合回归用例"
+            onClick={() => setSelected(installHttp8Regression())}
+          >
+            <Icon name="play" size={13} /> 装载回归示例
+          </button>
         </div>
         <div className="ops-scroll min-h-0 flex-1 p-2">
           {testCases.length === 0 && (
@@ -498,13 +540,28 @@ function ScheduleInline({ caseId }: { caseId: string }) {
       </button>
     );
   }
+  const cron = sc.cron ?? "";
+  const cronOk = !cron.trim() || isValidCron(cron.trim());
   return (
-    <span className="flex items-center gap-1">
+    <span className="flex flex-wrap items-center gap-1">
+      <input
+        className="ops-input ops-input-sm !w-36 font-mono text-[11px]"
+        placeholder="Cron 可选 */5 * * * *"
+        value={cron}
+        title={cronOk ? "5 段 Cron（分 时 日 月 周）；留空则用间隔" : "Cron 格式无效"}
+        onChange={(e) => upsertSchedule(caseId, { cron: e.target.value.trim() || null })}
+        style={!cronOk ? { borderColor: "var(--danger)" } : undefined}
+      />
       <select
         className="ops-input ops-input-sm !w-24"
         value={sc.intervalMinutes}
-        onChange={(e) => upsertSchedule(caseId, { intervalMinutes: Number(e.target.value) })}
-        title={`下次运行：${new Date(nextRunAt(sc.intervalMinutes, sc.lastRunAt)).toLocaleTimeString("zh-CN")}`}
+        disabled={Boolean(cron.trim())}
+        onChange={(e) => upsertSchedule(caseId, { intervalMinutes: Number(e.target.value), cron: null })}
+        title={
+          cron.trim()
+            ? "已启用 Cron，间隔停用"
+            : `下次运行：${new Date(nextRunAt(sc.intervalMinutes, sc.lastRunAt, sc.cron)).toLocaleTimeString("zh-CN")}`
+        }
       >
         {[5, 15, 30, 60, 360, 1440].map((m) => (
           <option key={m} value={m}>
@@ -554,13 +611,16 @@ function ReportPanel({ caseId }: { caseId: string }) {
   const assertCount = run.stepResults.reduce((acc, s) => acc + s.assertionResults.length, 0);
   const shown = run.stepResults.filter((s) => (filter === "all" ? true : filter === "pass" ? s.ok : !s.ok));
 
-  const download = () => {
-    const md = exportRunMarkdown(run);
-    const blob = new Blob([md], { type: "text/markdown;charset=utf-8" });
+  const download = (format: "md" | "json") => {
+    const body = format === "json" ? exportRunJson(run) : exportRunMarkdown(run);
+    const blob = new Blob([body], {
+      type: format === "json" ? "application/json;charset=utf-8" : "text/markdown;charset=utf-8",
+    });
     const url = URL.createObjectURL(blob);
     const a = document.createElement("a");
     a.href = url;
-    a.download = `${run.caseName}-报告-${new Date(run.at).toISOString().slice(0, 10)}.md`;
+    const day = new Date(run.at).toISOString().slice(0, 10);
+    a.download = `${run.caseName}-报告-${day}.${format === "json" ? "json" : "md"}`;
     a.click();
     URL.revokeObjectURL(url);
   };
@@ -596,8 +656,11 @@ function ReportPanel({ caseId }: { caseId: string }) {
           >
             <Icon name="rotate-cw" size={13} /> 再次运行
           </button>
-          <button className="ops-btn ops-btn-secondary" onClick={download}>
-            <Icon name="file-down" size={13} /> 导出报告
+          <button className="ops-btn ops-btn-secondary" onClick={() => download("md")}>
+            <Icon name="file-down" size={13} /> 导出 MD
+          </button>
+          <button className="ops-btn ops-btn-secondary" onClick={() => download("json")}>
+            <Icon name="file-down" size={13} /> 导出 JSON
           </button>
         </div>
       </div>