Adds the primitive the ports were missing: wada.ui.chart (two shifting
series, line or bar, settable range) plus rx_events/rx_dropped/tx_pkts/
freq/bw/sf/duty_pct on wada.mesh.stats.
RF Monitor 1.1: live RSSI + noise-floor chart, peak with tap-to-reset,
link-margin grade, RX/min, radio params, colour-coded heard feed, narrow
and wide layouts. Airtime 1.1: live + average utilization bars, peak,
rx/tx air split, duty ceiling, tx budget, packet counters, tap to restart
the window. Native versions stay compiled in until these are field-proven.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
