Three related improvements to the pre-rendered hero map system:
* New medium viewport variant (561–899 CSS px) for the per-hike detail
hero and the /hikes overview. Tablet/split-pane viewports were
getting the wide pose (chosen for ~1920 CSS px), which landed too
zoomed in. Each variant is rendered at a pose matching its
container, so the static→Leaflet handover aligns at every band.
Manifest fields are optional — pages fall back to the wide variant
on tablets until build-hikes regenerates the images.
* Overview frames on Switzerland (fixed center [46.82, 8.23]) with
explicit per-variant zooms (wide=8, medium=8, narrow=7) rather than
auto-fitting the union of hike bboxes. The previous behavior zoomed
in on whichever corner the catalogue clustered in; this reads as
"hikes across CH". Bumps OVERVIEW_RENDER_VERSION so cached overview
images get invalidated on the next build.
* Removed the post-tile-load flyToBounds in both HikeMap.svelte and
HikesOverviewMap.svelte. The map already opens at the static pose
via setView; the second auto-fit was adding a visible wobble on
routes whose bbox sits at an integer-zoom boundary (e.g. the
Einsiedeln–Unteriberg detail), where the build-time fit and
Leaflet's runtime fit disagree by one zoom step at the user's
actual container size.
Alexander
8a67f5fba8
