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-message-line.tsx

@@ -1,5 +1,8 @@
+import Markdown from "react-markdown";
+import remarkGfm from "remark-gfm";
 import Stack from "@moduletrace/twui/layout/Stack";
-import P from "@moduletrace/twui/layout/P";
+import linkComputerRefs from "@/src/utils/link-computer-refs";
+import { MessageMarkdownComponents } from "../(data)/message-markdown-components";
 import NeedsYouChip from "./needs-you-chip";
 
 type Props = {
@@ -7,12 +10,19 @@ type Props = {
     needs_you?: boolean;
 };
 
+/**
+ * One bot message, rendered from markdown (GFM; raw HTML is never
+ * rendered). Computers it names (`computerRef`) show as buttons that
+ * switch the bot to them.
+ */
 export default function BotMessageLine({ text, needs_you }: Props) {
     return (
         <Stack className="gap-1.5! items-start max-w-full">
-            <P noMargin className="text-sm leading-5 text-ink whitespace-pre-wrap break-words">
-                {text}
-            </P>
+            <Stack className="w-full gap-2.5! items-start break-words">
+                <Markdown remarkPlugins={[remarkGfm]} components={MessageMarkdownComponents}>
+                    {linkComputerRefs({ text })}
+                </Markdown>
+            </Stack>
             {needs_you ? <NeedsYouChip /> : null}
         </Stack>
     );