Memory detail opens in a right-side drawer

Clicking a Memory card anywhere in the app — Personal Space feed, Space feed, All Memories, or Search palette — now opens a 460 px right-side drawer that slides over the feed instead of navigating to a separate page. Every action available on the full page — edit, delete, move to a Space, assign a Topic, restore a version, attach or detach assets — works inside the drawer; dismiss with Esc, a backdrop click, or the × button. The URL still updates as each Memory opens, so deep links, refreshes, and shared URLs all render the full Memory page as before.