SimpleFT8

Full changelog: • Fixes clock sync recovery and adds stronger SNTP validation. • Map pins and station rows are now interactive, showing callsign, grid, distance, SNR, frequency, last-seen time, and local decode/QSO history. • Adds map timeline controls, optional Maidenhead grid overlay, and cleaner layer-specific map filtering. • Improves the logbook with search, sorting, QSO editing, single-contact ADIF copy, show-on-map, and undo after logging. • Adds autonomous band-hopping controls for unattended propagation checks, with synced-clock gating and live stay/skip controls. • Improves automated QSO handling: keeps TX armed after auto-logged QSOs, avoids same-call/grid repeats, and aborts cleanly when a station answers someone else.