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/(dict)/rail-user-menu-dict.ts

@@ -0,0 +1,34 @@
+import {
+    Activity,
+    CircleHelp,
+    Clock,
+    LogOut,
+    SlidersHorizontal,
+    type LucideIcon,
+} from "lucide-react";
+
+export type RailUserMenuItem = {
+    title: string;
+    /**
+     * Unset for destinations that are not built yet; the item renders
+     * disabled.
+     */
+    url?: string;
+    Icon: LucideIcon;
+    /**
+     * Rendered last, after a rule.
+     */
+    destructive?: boolean;
+};
+
+/**
+ * Exactly the five popover items. Nothing else lives in the rail: these
+ * destinations are only reachable from here.
+ */
+export const RailUserMenuItems: RailUserMenuItem[] = [
+    { title: "Activity", url: "/admin/logs", Icon: Activity },
+    { title: "Routines", Icon: Clock },
+    { title: "Settings", url: "/admin/settings", Icon: SlidersHorizontal },
+    { title: "Help", Icon: CircleHelp },
+    { title: "Sign out", url: "/auth/logout", Icon: LogOut, destructive: true },
+];