feat: consolidate to single Architectural Grid view and remove all notesViewMode logic

memento-note/app/(main)/page.tsx

@@ -8,19 +8,11 @@ export default async function HomePage() {
     getAISettings(),
   ])
 
-  const notesViewMode =
-    settings?.notesViewMode === 'masonry'
-      ? ('masonry' as const)
-      : settings?.notesViewMode === 'tabs'
-        ? ('tabs' as const)
-        : ('masonry' as const)
-
   return (
     <HomeClient
       initialNotes={allNotes}
       initialSettings={{
         showRecentNotes: settings?.showRecentNotes !== false,
-        notesViewMode,
         noteHistory: settings?.noteHistory === true,
         noteHistoryMode: (settings?.noteHistoryMode ?? 'manual') as 'manual' | 'auto',
         aiAssistantEnabled: settings?.paragraphRefactor !== false,