fix(web): 会话进度行时长从本轮开始算到结论正文,不再显示 0 秒(FIX-9)

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/agent/conversation-model.ts

@@ -291,13 +291,23 @@ export function buildConversation(
   return out;
 }
 
-/** 一段进度的起止时间(毫秒);没有工具调用为 null */
-export function activitySpan(activity: ActivityItem[]): number | null {
-  const calls = activity.flatMap((a) => (a.kind === "tool" ? [a.call] : []));
-  if (!calls.length) return null;
-  const start = Math.min(...calls.map((c) => Date.parse(c.startedAt)));
-  const end = Math.max(...calls.map((c) => Date.parse(c.endedAt ?? c.startedAt)));
-  return Number.isFinite(start) && Number.isFinite(end) ? end - start : null;
+/**
+ * 一段进度的时长(毫秒):从这一轮开始(since,如会话开始 / 用户消息的时间)或首个步骤,
+ * 到最后一个步骤结束或结论正文开始(until)。只算工具起止会漏掉模型思考的时间(整轮 7 秒显示成 0 秒)。
+ * 没有任何步骤为 null。
+ */
+export function activitySpan(
+  activity: ActivityItem[],
+  bounds: { since?: string | null; until?: string | null } = {},
+): number | null {
+  if (!activity.length) return null;
+  const starts = activity.map((a) => Date.parse(a.kind === "tool" ? a.call.startedAt : a.at));
+  const ends = activity.map((a) => Date.parse(a.kind === "tool" ? (a.call.endedAt ?? a.call.startedAt) : a.at));
+  const since = bounds.since ? Date.parse(bounds.since) : Number.NaN;
+  const until = bounds.until ? Date.parse(bounds.until) : Number.NaN;
+  const start = Math.min(...starts.filter(Number.isFinite), ...(Number.isFinite(since) ? [since] : []));
+  const end = Math.max(...ends.filter(Number.isFinite), ...(Number.isFinite(until) ? [until] : []));
+  return Number.isFinite(start) && Number.isFinite(end) && end >= start ? end - start : null;
 }
 
 /** 长正文:超过 ~12 行或 600 字按长文处理(收起时限高) */