Add computer switching, crew reporting, job steps and markdown chat

- Bots have a current computer (bots.computer_id), switched from the chat
  header beside the model button or by clicking a computer the bot names
  ([computer:ID]); tasks run on it by default
- search_computers runs one read-only command on all of a bot's computers;
  chat replies know their computers (compose-computers-note)
- The coordinator can use every computer and grants or revokes crew access
  with assign_computer
- Delegated jobs record requested_by_bot_id; the worker's result or failure
  is reported back in the coordinator's conversation
- bots_queue_updates records each model turn of a job, pushed live and shown
  in the working-on panel
- Live relay: every process pushes new messages, job steps and bot changes
  from the database to its own sockets, so work done elsewhere shows live
- Bot messages render as markdown (react-markdown + remark-gfm, no raw HTML)
  with twui components; rail previews are plain text
- Fix header button overflow in the model and computer selects
- Bump @moduletrace/twui to 0.1.2

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

src/pages/admin/bots/[bot_id]/(partials)/bot-models-modal.tsx

@@ -49,6 +49,7 @@ export default function BotModelsModal({ bot, harnesses: initial }: Props) {
             color="gray"
             size="small"
             disabled={!can_edit}
+            buttonContentProps={{ className: "min-w-0" }}
             className="max-w-full min-w-0 gap-2! flex-nowrap text-[13px] text-ink-secondary hover:text-ink"
         >
             <CpuAi size={16} aria-hidden className="shrink-0 -mt-0.5" />
@@ -61,7 +62,7 @@ export default function BotModelsModal({ bot, harnesses: initial }: Props) {
 
     if (!can_edit) {
         return (
-            <Stack className="ml-auto max-w-[40%] min-w-0 shrink">
+            <Stack className="max-w-[280px] min-w-0 shrink">
                 {target}
             </Stack>
         );
@@ -71,7 +72,7 @@ export default function BotModelsModal({ bot, harnesses: initial }: Props) {
         <Modal
             target={target}
             targetWrapperProps={{
-                className: "ml-auto max-w-[40%] min-w-0 shrink",
+                className: "max-w-[280px] min-w-0 shrink",
             }}
             open={open}
             setOpen={setOpen}