Show a reply's steps, and catch up on a reply whose live push was missed

A reply that works through tools now shows its latest tool step under
"is thinking…" (not its closing note, which is the answer). While a reply
is due, the open conversation checks the session's latest messages every
few seconds (api/admin/bots/session-messages) and replays any it missed
as server:bot-message, so the thread, rail and unread all take it and the
thinking row can't stay up until a reload. MCP and custom tool steps read
in words ("Using Exa search (web search exa)").

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

src/pages/admin/bots/[bot_id]/(partials)/bot-thinking-row.tsx

@@ -16,6 +16,10 @@ type Props = {
      * The latest step of the bot's active task.
      */
     progress?: string | null;
+    /**
+     * The latest step of the reply running in this conversation.
+     */
+    reply_progress?: string | null;
     /**
      * The thread's last message is the user's, so a reply is due here.
      */
@@ -29,13 +33,13 @@ type Props = {
 /**
  * Under the last message while the bot is working on a reply or a task
  * (or waiting for a model or its computer), so slow work doesn't look like
- * none. A task shows its latest step. The bot's face is one per user,
+ * none. A task or a reply shows its latest step. The bot's face is one per user,
  * shared by all their sessions with it, so a reply shows from the thread
  * alone: every user message queues one, so while the user has the last
  * word a reply is due here, even while the bot works elsewhere. Only the
  * waits (for a model, for its computer) come from the face.
  */
-export default function BotThinkingRow({ bot, progress, awaiting_reply, has_task }: Props) {
+export default function BotThinkingRow({ bot, progress, reply_progress, awaiting_reply, has_task }: Props) {
     const name = bot.name || "The bot";
     const asleep = bot.face == "asleep";
     const waiting_model = asleep && bot.status_line == BotWaitingStatusLine && Boolean(awaiting_reply || has_task);
@@ -53,7 +57,7 @@ export default function BotThinkingRow({ bot, progress, awaiting_reply, has_task
         : working
           ? `${name} is working…`
           : `${bot.status_line}…`;
-    const detail = working ? progress : null;
+    const detail = working ? progress : thinking ? reply_progress : null;
 
     return (
         <Row role="status" className="w-full gap-3! flex-nowrap items-center">

src/pages/admin/bots/[bot_id]/(partials)/message-thread.tsx

@@ -14,6 +14,10 @@ type Props = {
      * The latest step of the bot's active task, shown while it works.
      */
     progress?: string | null;
+    /**
+     * The latest step of the reply running here, shown while it thinks.
+     */
+    reply_progress?: string | null;
     /**
      * This session has an active task.
      */
@@ -26,7 +30,7 @@ type Props = {
  * While the bot works on a reply or a task, a status row sits under the
  * last one.
  */
-export default function MessageThread({ bot, messages, progress, has_task }: Props) {
+export default function MessageThread({ bot, messages, progress, reply_progress, has_task }: Props) {
     const groups = groupMessages({ messages });
 
     return (
@@ -47,6 +51,7 @@ export default function MessageThread({ bot, messages, progress, has_task }: Pro
                 <BotThinkingRow
                     bot={bot}
                     progress={progress}
+                    reply_progress={reply_progress}
                     awaiting_reply={messages[messages.length - 1]?.author == "user"}
                     has_task={has_task}
                 />