I need a production-ready NFC mobile app that runs natively on both iOS and Android and communicates with our emergency-lighting control gear. The core workflow is: • Detect the NFC tag on each luminaire’s control gear. • Read and display: – Device Type – GTIN number – Serial number – Software & Hardware version – Current operational status • Configure one key setting: turn the DALI power-supply rail on or off. • Save every read or write session to a plain-text log file that can be shared or archived. I will supply sample gear, the current NFC tag specification, and the DALI command required for the power-rail toggle. The finished solution should include: – A clean, technician-friendly UI. – Robust tag-error handling and confirmation prompts before writing. – Local caching so readings are preserved even when offline, with an option to export the log via email, cloud drive, or AirDrop/Share Sheet. – Source code, build instructions, and signed binaries ready for TestFlight and Google Play internal testing. – Brief developer documentation outlining how new parameters could be added later. Use any cross-platform stack you prefer (React Native, Flutter, Kotlin Multiplatform, etc.) as long as it delivers native-level NFC performance on both operating systems. Please outline your proposed tech stack, timelines, and any prior NFC or DALI experience when you respond.