fix: hold names up on the sphere, and hold the map in the middle

Z now means the same thing on both panes: the globe raises name cards
over the pins nearest what the camera faces, within a budget --
a planet of two thousand names at once is noise -- rebuilt as the view
settles and dropped on release. The cards were being built all along
and drawn nowhere: a sprite's anchor lives in the unit square, and an
anchor pushed past it took the card with it.

The chart loses its top-anchor bias: the camera is constrained to the
map's own window rather than the world square it is cut from, so a
sheet shorter than the square centers in the pane instead of hugging
the square's empty top. A variant swap rebuilds the constraint around
the new layer's window while keeping the reader's place, which is what
split sheets needed anyway. And the backquote now flips panes from
inside the geohash field the way space works the subgrid from it -- no
hash will ever spell either character.

commit

abd701294c01e0cfdecfa9aed4123593cbfed018

parent

700f3d11f42490c0e0960facf3a60a990620ba2e

author

Dami <dami.etoile@gmail.com>