CustomSelect gains keepOpen prop: dropdown stays open after each
selection, closes via Fertig button or tap outside. ObjektSelector
separates Neu into its own button to keep the dropdown flow clean.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Native <select> popups ignore CSS on iOS/Android. CustomSelect renders
a styled div-based dropdown with full-width touch-friendly option buttons
(py-3, text-base). Used in BeoSelector and ObjektSelector.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
