feat: flip card transition

frontend/src/app/recollections/RecollectionLayout.tsx

@@ -1,12 +1,13 @@
 /**
- * Layout for a single recollection: shared menubar (with optional custom content from active page) and outlet.
+ * Layout for a single recollection: shared menubar and flipping card (Logos front / Flux back).
  */
 
 import React, { useEffect } from 'react'
-import { Link, Outlet, useParams } from 'react-router-dom'
+import { Link, useParams } from 'react-router-dom'
 import { usePlatform } from '@/app/kosmos/KosmosContext'
 import { RecollectionMenubarProvider } from './RecollectionMenubarContext'
 import { RecollectionMenubar } from './RecollectionMenubar'
+import { FlippingCardView } from './FlippingCardView'
 
 export function RecollectionLayout() {
   const { recollectionId } = useParams<{ recollectionId: string }>()
@@ -35,7 +36,7 @@ export function RecollectionLayout() {
       <div className="flex min-h-0 flex-1 flex-col">
         <RecollectionMenubar />
         <div className="flex min-h-0 flex-1 flex-col overflow-hidden">
-          <Outlet />
+          <FlippingCardView />
         </div>
       </div>
     </RecollectionMenubarProvider>