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/pages/__root.tsx

@@ -12,6 +12,7 @@ import { SiteData } from "@/src/data/site-data";
 import Layout from "../layouts/main";
 import AdminLayout from "../layouts/admin";
 import AuthLayout from "../layouts/auth";
+import BotsLayout from "../layouts/bots";
 import ThemeInitScript from "../components/general/theme-init-script";
 
 export const AppContext = React.createContext<AppContextObject>(
@@ -46,6 +47,14 @@ export default function App({
         query,
     };
 
+    if (url?.pathname.startsWith("/admin/bots")) {
+        return (
+            <AppContext.Provider value={appContextObject}>
+                <BotsLayout>{children}</BotsLayout>
+            </AppContext.Provider>
+        );
+    }
+
     if (url?.pathname.startsWith("/admin")) {
         return (
             <AppContext.Provider value={appContextObject}>
@@ -94,7 +103,7 @@ export function Head({ serverRes, ctx }: BunextPageHeadFCProps) {
                 crossOrigin=""
             />
             <link
-                href="https://fonts.googleapis.com/css2?family=Geist:[email protected]&family=Geist+Mono:wght@400..600&display=swap"
+                href="https://fonts.googleapis.com/css2?family=Lato:wght@400;700;900&display=swap"
                 rel="stylesheet"
             />
             <link rel="icon" href="/favicon.ico" sizes="16x16 24x24 32x32 48x48" />