Live sensor connection type hardcoded as TODO

[SL-Mar]

Problem

In api/live.py line 33, the connection type is hardcoded as "serial" with a TODO comment: # TODO: track actual type. The sensor config supports serial, TCP, UDP, and simulator modes but the status endpoint always reports "serial".

Impact

• Live status endpoint returns misleading connection info
• Harder to debug sensor connection issues
• WebSocket clients can't display actual connection mode

Steps to fix

1. Store the active connection type in the sensor state
2. Update /api/live/status to return the actual type
3. Track changes when switching connection modes

Files

• api/live.py (lines 33, 120-160)