chore: update devbook.md to mark completion of layout, UI components, and homepage; update dev.db

src/components/ui/index.ts

@@ -0,0 +1,7 @@
+export { Button } from './Button';
+export { Card, CardHeader, CardTitle, CardDescription, CardContent, CardFooter } from './Card';
+export { Input } from './Input';
+export { Textarea } from './Textarea';
+export { Badge } from './Badge';
+export { Modal, ModalFooter } from './Modal';
+