beacons: surveillance scanner

New in v2.2.0: Wi-Fi detections now show their channel and band. A detection's details gain a "Wi-Fi channel" row ("6 · 2.4 GHz", "149 · 5 GHz"), and Log CSV exports add wifi_channel and wifi_band_ghz as their last two columns, so an existing parser keeps working. The row appears with beacon firmware 2.2.0; older firmware does not send the channel. ESP32 C5 5GHz board is now supported: when the connected board has a 5 GHz radio, Beacon > Scan radios shows a "5 GHz Wi-Fi" switch with a note on what it costs the 2.4 GHz band. Today's boards listen on 2.4 GHz only, so they never show it. Your lists survive a locked-phone launch: starting the app from a lock-screen control while the phone was still locked could, in rare cases, open it with empty watch and ignore lists and an empty history, and the next save kept them empty. The app now waits for the phone to unlock before it reads them. Counts private on the wrist too: with counts set to private, the Live Mode view on Apple Watch and in CarPlay shows a lock instead of the number, like the lock-screen card. The Dynamic Island keeps showing counts. Beacon firmware 2.2.0 is available from the Beacon tab. It stamps every Wi-Fi detection with its channel; its drone address-block fallback now needs an access-point style broadcast, follows the drone detector switch, and is no longer forced on by desert mode, so probing phones and handheld cameras stop showing as drones; it adds DJI, SkyBell and Canary address blocks; and it closes a defect that could reopen the new-phone pairing window about 25 days after it closed. Update recommended. FAQ/Help answers updated to match. Nothing is uploaded automatically, as always.