Live Scan: WiFi Mapper BLE relay acceptance

[squazaryu]

WiFi analysis currently works on pulled/structured captures (import a .pcap → networks/clients/vendors). A live mode was intentionally deferred.

Idea: add an opt-in live scan view that streams Marauder output over the App Bridge serial and renders networks/clients in real time, separate from the offline analysis flow.

Acceptance: a live scan tab shows APs/stations updating in real time without breaking the existing offline pcap analysis.

[squazaryu]

Migration note from firmware backlog.

This issue now owns the Companion/live hardware acceptance for tumoflip#44: squazaryu/tumoflip#44

Firmware-side relay is implemented and device-routable. Contract summary:

• Flipper app: WiFi Mapper;
• App Bridge app id: wifi_mapper;
• command/event: live_line;
• FAB2 unsolicited event, request id 0, flags 0, single-frame chunk 0/1;
• payload: raw UART lines separated by \n, capped around 150 bytes;
• opt-in only from WiFi Mapper via Hold Down / BLE marker;
• CSV/offline log remains source of truth.

Known app-side requirement from previous fix: decoder must allow request id 0 only for clean unsolicited events. This was published in Companion v1.3.5+.

Acceptance target:

1. Install/use Companion v1.3.5+ on iPhone.
2. Connect to Flipper running current Tumoflip dev firmware.
3. Open WiFi Mapper, Hold Down to arm BLE relay, start scan/logging.
4. Open Companion Live Scan and confirm AP/client lines appear in real time.
5. Hold Down again and confirm streaming stops.
6. Test no Companion connected, link interruption, app exit, and normal offline log flow.