BLE transport● Browser sandbox
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// 4B lat · 4B lng · 1B category · 2B hash → 11 bytes, well below the 31-byte BLE cap.
Activate Passive Wi-Fi Beacon (Trapped Mode)
Rebroadcasts your SOS as an emergency SSID
Passive Radio Scanner
Alert Controls
// Toggle off any channel that could compromise stealth.
// Browser sandbox — frames pumped over the gateway with the SAME byte-packing the native path uses.