- Select mode in ActivityFeed: toggle with Select button (logged-in only),
cards become clickable with checkmark indicator, action bar fixed at bottom
- Bulk delete: calls existing DELETE /api/activity/{id} for each selected,
removes from local feed state immediately
- Bulk merge: POST /api/merge sorts by started_at (earliest = primary),
sums distance/duration/elevation, weighted-averages HR/power, concatenates
geojson and timeseries; backs up originals to _merge_backup/ for recovery
- GET /api/merges returns per-user hidden list; feed filters secondaries
client-side on load so static shards don't need a rebuild to hide them
- POST /api/unmerge/{id} restores primary from backup, unhides secondaries
- ActivityDetail: shows "Merged (N)" badge + Unmerge button for owners
- Fix: edit button now works from personal profile feed (handle was missing
from year-shard activities; injected from filterHandle on sessionStorage write)
Davide Scaini
b781193d44