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/functions/backend/db/bots-queue/relay-job-to-requester.ts

@@ -0,0 +1,53 @@
+import BunSQLite from "@moduletrace/bun-sqlite";
+import type { BUN_SQLITE_COBBLE_BOTS, BUN_SQLITE_COBBLE_BOTS_QUEUE } from "@/db/types/db";
+import insertBotMessage from "../bots/insert-bot-message";
+
+type Params = {
+    job: BUN_SQLITE_COBBLE_BOTS_QUEUE;
+    /**
+     * The worker's report, or why it failed (markdown).
+     */
+    text: string;
+    failed?: boolean;
+};
+
+/**
+ * Reports a handed-over job back to the bot that handed it over
+ * (`requested_by_bot_id`, the coordinator): a message in its conversation
+ * with the worker's report, flagged needs-you when the job failed. Returns
+ * the message for the live push, or null when nobody handed the job over.
+ */
+export default async function relayJobToRequester({ job, text, failed }: Params) {
+    if (!job.requested_by_bot_id || !job.bot_id || job.requested_by_bot_id == job.bot_id) {
+        return null;
+    }
+
+    const worker = (
+        await BunSQLite.sql<BUN_SQLITE_COBBLE_BOTS>({
+            sql: `SELECT name FROM bots WHERE id = ? LIMIT 1`,
+            values: [job.bot_id],
+        })
+    ).payload?.[0];
+
+    const requester = (
+        await BunSQLite.sql<BUN_SQLITE_COBBLE_BOTS>({
+            sql: `SELECT id FROM bots WHERE id = ? LIMIT 1`,
+            values: [job.requested_by_bot_id],
+        })
+    ).payload?.[0];
+
+    if (!requester?.id) return null;
+
+    const name = worker?.name || "A crew member";
+    const title = job.title || "the job";
+
+    const message = await insertBotMessage({
+        bot_id: requester.id,
+        text: failed
+            ? `${name} couldn't finish **${title}**. ${text}`.trim()
+            : `${name} finished **${title}**. Their report:\n\n${text}`,
+        needs_you: failed,
+    });
+
+    return { bot_id: requester.id, message };
+}