A paired source/target language picker — From/To pill toggles with flag + name + a swap button, or a compact {source} → {target} pair of selects. Fully controlled via sourceCode/targetCode and onSelectSource/onSelectTarget/onSwap. Feeds useTranslate; composes with useDetectLanguage for auto-detect source.
pnpm dlx shadcn@latest add "https://localmode.ai/r/ui/input-controls/language-pair-selector.json"