SMTP configuration is an admin concern, not a per-user setting. Removed
it from the settings sidebar and relocated to /admin/smtp with a link in
the admin sidebar.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add 'Allgemein' category section ABOVE existing Dashboard category
- Single SMTP link to /settings/general/smtp with identical active/inactive styling and aria-current
- isActive('/settings/general/smtp') works via pathname.startsWith branch
- Existing Dashboard/Widgets/Calendar items unchanged
- Create settings/layout.tsx with SettingsSidebar and back-to-dashboard link
- Create settings/page.tsx with redirect to /settings/dashboard
- Create settings-sidebar.tsx with Widgets and Calendar nav items, aria-current
- Add Settings link in header user dropdown (gear icon, before logout)
- Add settings namespace (DE+EN) with all category and action keys
- Add widgets namespace (DE+EN) with all widget names, descriptions, error states
- Add header.settings key ("Einstellungen"/"Settings")
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>