Extract the footer's TR/EN toggle into a reusable LanguageSwitcher with two variants: `inline` (segmented row, used by the footer) and `dropdown` (round Globe icon + menu with active check). Add the dropdown variant to the dashboard header next to the theme toggle so app users can switch language without the marketing footer. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>