feat: show demo flow progress and elapsed time

server/routers.ts

@@ -1262,6 +1262,26 @@ export const appRouter = router({
       .mutation(async ({ input }) => {
         markDemoFlowCancelled(input.taskId);
         const result = await cancelTaskAnalysisResultsByTask(input.taskId, "用户停止一键全流程演示");
+        const rows = await db.listTaskAnalysisResults(input.taskId);
+        const latestDemoRow = rows.find((row) => {
+          const data = row.resultData as Record<string, unknown> | null;
+          return typeof data?.demoFlowRunId === "string";
+        });
+        if (latestDemoRow) {
+          const latestDemoData = latestDemoRow.resultData as Record<string, unknown>;
+          const latestRunId = latestDemoData.demoFlowRunId;
+          const cancelledAt = new Date().toISOString();
+          // 即使停止发生在“配准完成、测量记录尚未创建”的短暂窗口，
+          // 也在本次链路的全部现有记录上留下结束标记，避免刷新后重新显示为排队中。
+          await Promise.all(
+            rows
+              .filter((row) => {
+                const data = row.resultData as Record<string, unknown> | null;
+                return data?.demoFlowRunId === latestRunId;
+              })
+              .map((row) => db.patchTaskAnalysisResultData(row.id, { demoFlowCancelledAt: cancelledAt })),
+          );
+        }
         return {
           ...result,
           scheduler: algorithmJobStats(),