- ConnectionConfig: new file_path and delay fields
- ConnectionRow: File page with path input, Browse button, delay
spinner (0–10 s), and auto-fill of receiver-ID from filename
- ReceiverManager.connect_receiver: FileBackend wired for 'file' type;
UBX poll timer skipped for file sources
- FileBackend.register_xcvr: fallback to first unoccupied entry when
name does not match filename pattern
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
jensandClaude Sonnet 4.6
ff686b64f7