The default view came from the mesh's own face normal and sat 24.6 degrees off the
design export's frame; re-applying any preset also adopted its baked distance, so the
part overflowed the viewport (measured 2.16 x 2.12 of it). Presets are now the frame's
own views, every preset is reframed through the pane's existing fit, and that fit
projects the model's bounds instead of a bounding sphere. Verified: the frame axes map
to screen up, left and viewer to 1e-6, the model fills 0.60-0.95 of the viewport at two
sizes, and the recompiled package keeps its geometry, domain and source-geometry ids.
ykcheungab