feat: RTL/i18n, AI translate+undo, no-refresh saves, settings perf

- RTL: force dir=rtl on LabelFilter, NotesViewToggle, LabelManagementDialog
- i18n: add missing keys (notifications, privacy, edit/preview, AI translate/undo)
- Settings pages: convert to Server Components (general, appearance) + loading skeleton
- AI menu: add Translate option (10 languages) + Undo AI button in toolbar
- Fix: saveInline uses REST API instead of Server Action → eliminates all implicit refreshes in list mode
- Fix: NotesTabsView notes sync effect preserves selected note on content changes
- Fix: auto-tag suggestions now filter already-assigned labels
- Fix: color change in card view uses local state (no refresh)
- Fix: nav links use <Link> for prefetching (Settings, Admin)
- Fix: suppress duplicate label suggestions already on note
- Route: add /api/ai/translate endpoint

keep-notes/app/(main)/settings/mcp/page.tsx

@@ -0,0 +1,23 @@
+import { auth } from '@/auth'
+import { redirect } from 'next/navigation'
+import { McpSettingsPanel } from '@/components/mcp/mcp-settings-panel'
+import { listMcpKeys, getMcpServerStatus } from '@/app/actions/mcp-keys'
+
+export default async function McpSettingsPage() {
+  const session = await auth()
+
+  if (!session?.user) {
+    redirect('/api/auth/signin')
+  }
+
+  const [keys, serverStatus] = await Promise.all([
+    listMcpKeys(),
+    getMcpServerStatus(),
+  ])
+
+  return (
+    <div className="space-y-6">
+      <McpSettingsPanel initialKeys={keys} serverStatus={serverStatus} />
+    </div>
+  )
+}