fix(consult): stop the consult-gate VedAstro wait and record step timing

Consult turns reuse a same-day official snapshot inside the rectification gate, or record deferred_in_consultation instead of starting another 4-second snapshot. Classification, step 0, step 1, and the time to the first answer character go into the existing usage metadata and a new admin usage column.

BUG-1231, BUG-1232

frontend/src/components/admin/billing-operations-resources.tsx

@@ -18,6 +18,7 @@ import {
 import { useState } from "react";
 
 import { adminRequestJson, type AdminIdentity } from "@/lib/admin/providers";
+import { formatUsageTiming, type UsageTimingView } from "@/lib/consultation-step-timing";
 import { formatAdminDate, ResourceTable } from "./resource-table";
 
 const { Text } = Typography;
@@ -416,6 +417,7 @@ type Usage = {
   costMicrousd: number;
   durationMs: number | null;
   cacheReadTokens: number | null;
+  timing: UsageTimingView | null;
   createdAt: string;
 };
 
@@ -468,6 +470,13 @@ export function UsageResource() {
       dataIndex: "durationMs",
       render: (value) => (value == null ? "—" : `${value} ms`),
     },
+    {
+      title: "分段",
+      dataIndex: "timing",
+      render: (value: UsageTimingView | null) => (
+        <Text style={{ whiteSpace: "pre-line" }}>{formatUsageTiming(value)}</Text>
+      ),
+    },
     { title: "时间", dataIndex: "createdAt", render: formatAdminDate },
   ];
   return (