Select button in header enters selection mode. Cards show a checkbox and
become tappable. Header updates to show N selected + Cancel.
Bulk actions (bottom bar):
- Export: sequential Sharing.shareAsync for each selected file
- Upload: sequential upload with N/total progress text
- Delete: confirm then delete all selected at once
- Merge: parses each GPX file, combines track points sorted by time,
prompts for title via Modal, saves as new recording
parseGpxFile() added to gpx.ts: reads file via expo-file-system,
extracts trkpt elements including hr/power/cad extensions via regex.
Sets up the full bincio-rec source tree: Zustand recording store with
haversine stats, background GPS via expo-task-manager, BLE scan/subscribe
for HR and power, GPX writer with Garmin extensions, SQLite recordings
list, multipart upload to bincio-activity, React Navigation stack with
bottom tabs, and build instructions in README.md.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Davide Scaini