Parse tshark GSM field values with int(value, 0) instead of int(value)
to auto-detect hex 0x-prefixed output (e.g. 0x039e for TMSI/LAC/CID).
Without this, every tshark line with hex values fails to parse, causing
0 devices to be captured during monitoring.
Also add API Keys tab to Settings modal for configuring OpenCellID key
via the UI (in addition to env var), with status display and usage bar.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
90e88fc469