LiveView for creating and editing inventory documents.
Handles:
:new— creates a draft and push_navigate to :edit path.:edit— loads an existing document; :general tab.:items— count sheet + add picker (draft only).:files— MediaBrowser; storage folder resolved asynchronously.:comments— inventory comments thread.
Uses the admin-chrome pattern: use PhoenixKitWeb, :live_view +
<.admin_page_header>. No <Layouts.app>, no streams.
All navigation paths wrapped in PhoenixKit.Utils.Routes.path/1.