fix: Add debounced Undo/Redo system to avoid character-by-character history

- Add debounced state updates for title and content (500ms delay)
- Immediate UI updates with delayed history saving
- Prevent one-letter-per-undo issue
- Add cleanup for debounce timers on unmount

keep-notes/app/archive/page.tsx

@@ -0,0 +1,15 @@
+import { getArchivedNotes } from '@/app/actions/notes'
+import { NoteGrid } from '@/components/note-grid'
+
+export const dynamic = 'force-dynamic'
+
+export default async function ArchivePage() {
+  const notes = await getArchivedNotes()
+
+  return (
+    <main className="container mx-auto px-4 py-8 max-w-7xl">
+      <h1 className="text-3xl font-bold mb-8">Archive</h1>
+      <NoteGrid notes={notes} />
+    </main>
+  )
+}