Add PDF modal and selectedPost setter

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

node_modules/zustand/shallow.d.ts

@@ -0,0 +1,7 @@
+import { shallow } from './vanilla/shallow';
+/**
+ * @deprecated Use `import { shallow } from 'zustand/shallow'`
+ */
+declare const _default: typeof shallow;
+export default _default;
+export { shallow };