Save visibility of wpt groups

[Dima-1]

#712

[Copilot]

Pull request overview

Adds persistence for waypoint-group visibility so waypoint visibility does not reset after refresh/logout (Issue #712) by saving group hidden flags and reapplying them when tracks are rendered.

Changes:

• Introduces INFO_FILE_EXT constant and uses it where .info filenames are constructed/filtered.
• Saves waypoint-group visibility (pointsGroups.*.ext.hidden) for cloud tracks by uploading an updated .info file.
• Applies waypoint-group visibility when redrawing waypoint markers on existing Leaflet layers.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
map/src/menu/settings/CloudSettings.jsx	Filters out .info files using a shared extension constant.
map/src/map/util/TrackLayerProvider.js	Stores pointsGroups on the layer and uses it to hide/show waypoint markers during redraw.
map/src/manager/track/TracksManager.js	Exports INFO_FILE_EXT and uses it when building .info download URLs.
map/src/manager/track/SaveTrackManager.js	Adds saveInfoFile to upload .info updates containing waypoint-group visibility.
map/src/infoblock/components/tabs/WaypointsTab.jsx	Updates waypoint-group visibility state and debounced saving for cloud tracks.

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[alisa911]

Add a test and test.