Tidy the bot chat: icon header controls, status in the rail, narrower thread

Drop the working-on panel. Rail rows show the bot's status line first.
The header's computer and model controls are ghost icons opening modals
that explain them, and the bot's text model, provider and computer show
under its name. The thread and composer are held to 760px.

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

src/pages/admin/bots/[bot_id]/index.server.ts

@@ -1,7 +1,6 @@
 import userAuth from "@/src/functions/backend/auth/user-auth";
 import grabBots from "@/src/functions/backend/db/bots/grab-bots";
 import grabBotMessages from "@/src/functions/backend/db/bots/grab-bot-messages";
-import grabActiveBotTask from "@/src/functions/backend/db/bots/grab-active-bot-task";
 import markBotRead from "@/src/functions/backend/db/bots/mark-bot-read";
 import grabBotComputers from "@/src/functions/backend/db/computers/grab-bot-computers";
 import grabBotHarnessOverview from "@/src/functions/backend/db/harness/grab-bot-harness-overview";
@@ -41,9 +40,8 @@ export const server: BunextPageServerFn<PagePropsType> = async (params) => {
      * The header's models modal: a worker's own settings, or for the
      * coordinator the defaults it runs on (without the providers).
      */
-    const [bot_messages, bot_task, bot_harness_overview, bot_computers] = await Promise.all([
+    const [bot_messages, bot_harness_overview, bot_computers] = await Promise.all([
         grabBotMessages({ bot_id: bot.id }),
-        grabActiveBotTask({ bot_id: bot.id }),
         (bot.kind == "coordinator"
             ? grabHarnessOverview().then(({ harnesses }) => ({ harnesses }))
             : grabBotHarnessOverview({ bot_id: bot.id })
@@ -56,7 +54,6 @@ export const server: BunextPageServerFn<PagePropsType> = async (params) => {
             bots,
             bot,
             bot_messages,
-            bot_task,
             bot_harness_overview,
             bot_computers,
         },