Build Cobble project structure from the handoff

- Remove the preset document suite (letters, emails, invoices, quotes,
  PDF generation, line items) with its routes, API handlers and tables
- Rebrand to Cobble: site data, Lato, handoff design tokens (light and
  dark) in main.css, brand assets in public/brand, ember stone logo and
  regenerated favicons
- Add bots, bot_messages, bot_tasks and bot_task_steps tables, regenerate
  DB types (BUN_SQLITE_COBBLE_*) and add a sample crew seed (seed:bots)
- Add the chat shell at /admin/bots: rail with pinned coordinator and
  user popover, bottom-anchored conversation with composer, working-on
  panel, and a send-message API scoped to the session user
- Add BotStone and Wordmark components, crew status and relative time
  utils with tests, and update AGENTS.md

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

src/layouts/bots/(partials)/coordinator-row.tsx

@@ -0,0 +1,27 @@
+import Divider from "@moduletrace/twui/layout/Divider";
+import type { BotWithLastMessage } from "@/src/types";
+import { crewStatusLine } from "@/src/utils/crew-status";
+import BotRow from "./bot-row";
+
+type Props = {
+    bot: BotWithLastMessage;
+    bots: BotWithLastMessage[];
+    selected?: boolean;
+};
+
+/**
+ * Pinned first. Hue-less, and its subtitle is the crew status, not a
+ * snippet.
+ */
+export default function CoordinatorRow({ bot, bots, selected }: Props) {
+    return (
+        <>
+            <BotRow
+                bot={bot}
+                selected={selected}
+                subtitle={crewStatusLine({ bots })}
+            />
+            <Divider className="shrink-0 mx-1 lg:mx-3 my-2 w-auto border-hairline dark:border-hairline" />
+        </>
+    );
+}