Fix gallery photo timestamp and map pin not updating after note save

Gallery photos were always anchored to track.endMs with the final GPS
position. Now reads EXIF DateTimeOriginal (parsed in device local time)
after copying the file; if the timestamp falls within the track window
the note is positioned at the correct time and nearest track point.
Notes taken outside the window fall back to the previous behaviour.

Map note layer was never refreshed after saving — drawNotes() ran once
at style-load time and the GeoJsonSource was never updated. Added
refreshNoteLayer() which updates the existing source or creates it if
no notes existed before.

https://claude.ai/code/session_01KXYBuAHZkvv63DeUG6XaZD

0 files changed, 0 insertions, 0 deletions