feat: improve AI Chat UX, add notebook summary, and fix shared/reminders routing

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

@@ -31,12 +31,12 @@ export default async function MainLayout({
   return (
     <ProvidersWrapper initialLanguage={initialLanguage} initialTranslations={initialTranslations}>
       {/* No top-bar header — sidebar-only navigation (architectural-grid design) */}
-      <div className="flex h-screen overflow-hidden bg-[#E5E2D9]">
+      <div className="flex h-screen overflow-hidden bg-memento-desk">
         <Suspense fallback={<div className="hidden w-80 shrink-0 md:block" />}>
           <Sidebar user={session?.user} />
         </Suspense>
 
-        <main className="flex min-h-0 flex-1 flex-col overflow-y-auto scroll-smooth bg-background">
+        <main className="flex min-h-0 flex-1 flex-col overflow-y-auto scroll-smooth bg-memento-paper">
           {children}
         </main>
 

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

@@ -25,6 +25,7 @@ export default async function HomePage() {
         notesViewMode,
         noteHistory: settings?.noteHistory === true,
         noteHistoryMode: (settings?.noteHistoryMode ?? 'manual') as 'manual' | 'auto',
+        aiAssistantEnabled: settings?.paragraphRefactor !== false,
       }}
     />
   )

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

@@ -1,9 +0,0 @@
-import { getNotesWithReminders } from '@/app/actions/notes'
-import { RemindersPage } from '@/components/reminders-page'
-
-export const dynamic = 'force-dynamic'
-
-export default async function RemindersRoute() {
-  const notes = await getNotesWithReminders()
-  return <RemindersPage notes={notes} />
-}

memento-note/app/(main)/settings/general/general-settings-client.tsx

@@ -29,9 +29,11 @@ export function GeneralSettingsClient({ initialSettings }: GeneralSettingsClient
     await updateAISettings({ preferredLanguage: value as any })
     if (value === 'auto') {
       localStorage.removeItem('user-language')
+      document.cookie = 'user-language=;path=/;max-age=0'
       toast.success(t('settings.languageAuto') || 'Language set to Auto')
     } else {
       localStorage.setItem('user-language', value)
+      document.cookie = `user-language=${value};path=/;max-age=${60 * 60 * 24 * 365};samesite=lax`
       setContextLanguage(value as any)
       toast.success(t('profile.languageUpdateSuccess') || 'Language updated')
     }