Adds MapLibre GL with OpenFreeMap as a tokenless third map provider
alongside Leaflet and Mapbox: a provider abstraction with style presets,
CSP + service-worker entries for tiles.openfreemap.org, and the
map_provider allow-list entry. Mapbox-only APIs stay gated behind the
mapbox provider, and existing Mapbox/Leaflet users are unaffected.
Maintainer review follow-ups folded in: the new map-settings strings are
translated across all locales; the GL engine is lazy-loaded so
Leaflet-only installs don't download it; MapLibre gets its own
maplibre_style slot so switching providers no longer overwrites a custom
Mapbox style; and the MapLibre render path plus the OpenFreeMap
style-guards are covered by tests.
- Mapbox GL provider alongside Leaflet for trip and journey maps (opt-in in
settings with token, style presets incl. 3D on satellite, quality mode,
experimental badge).
- GPS "blue dot" with heading cone on mobile; three-state FAB (off / show /
follow), geodesic accuracy circle, desktop-hidden since browser IP geo is
too coarse for navigation.
- Marker drift fix: outer wrap no longer carries inline position/transform,
so mapbox's translate keeps the pin pinned at every zoom and pitch.
- Journey map popup (mapbox-gl): Apple-Maps-style tooltip on marker
highlight/click showing entry title + location / date subline.
- Journey feed reorder: up/down controls to the left of each entry reorder
sort_order within a day. Server endpoint, optimistic store update, rollback
on failure.
- Journey entry editor: desktop modal now centers over the feed column only,
backdrop still blurs the whole page (map included).
- Scroll-sync guard on journey: marker click locks the sync so smooth-scroll
can't steer the highlight to a neighbouring entry mid-animation.
- Misc: map top-padding aligned with hero, live/synced badges replaced by a
compact back-button in the hero, skeleton entries no longer pollute the
journey map, journey detail no longer shows map on mobile path when
combined view is active.