Add safe database migration workflow and note history infrastructure.

This introduces guarded migrations with automatic backups, fixes note creation after DB reset, and wires snapshot/restore history across notes surfaces.

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

@@ -0,0 +1,28 @@
+import { getAllNotes } from '@/app/actions/notes'
+import { getAISettings } from '@/app/actions/ai-settings'
+import { HomeClient } from '@/components/home-client'
+
+export default async function HomePage() {
+  const [allNotes, settings] = await Promise.all([
+    getAllNotes(),
+    getAISettings(),
+  ])
+
+  const notesViewMode =
+    settings?.notesViewMode === 'masonry'
+      ? 'masonry' as const
+      : settings?.notesViewMode === 'tabs' || settings?.notesViewMode === 'list'
+        ? 'tabs' as const
+        : 'masonry' as const
+
+  return (
+    <HomeClient
+      initialNotes={allNotes}
+      initialSettings={{
+        showRecentNotes: settings?.showRecentNotes !== false,
+        notesViewMode,
+        noteHistory: settings?.noteHistory === true,
+      }}
+    />
+  )
+}