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)/markdown-link.tsx

@@ -0,0 +1,27 @@
+import type { ComponentProps } from "react";
+import Link from "@moduletrace/twui/layout/Link";
+import { ComputerRefHrefPrefix } from "@/src/utils/link-computer-refs";
+import ComputerRefChip from "./computer-ref-chip";
+
+/**
+ * A link in a bot message. A computer the bot named (`linkComputerRefs`)
+ * becomes its switch button; anything else opens in a new tab.
+ */
+export default function MarkdownLink({ href, children }: ComponentProps<"a">) {
+    if (href?.startsWith(ComputerRefHrefPrefix)) {
+        const computer_id = Number(href.slice(ComputerRefHrefPrefix.length));
+
+        if (computer_id) return <ComputerRefChip computer_id={computer_id} />;
+    }
+
+    return (
+        <Link
+            href={href}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="text-ink underline underline-offset-2 hover:opacity-80 break-words"
+        >
+            {children}
+        </Link>
+    );
+}