fix(ui): Galaxy/Compare polish and startup defaults

feat(galaxy): soft stars, Group hue paint, and 2.4.2 feel polish

feat(viz): group contrast paint, high-range zero coverage, HUD dim

feat(ui): field-info tips and retire landscape gate

fix(ui): slim mobile navbar and glue Visualization to HUD

fix(ui): put Visualization handle on top and fluid HUD width

fix(ui): restore Visualization under Spatial with top-right dock tab

fix(ui): glue Visualization to inset bottom HUD

fix(ui): use vertical Visualization handle to stop dock-tab conflict

fix(ui): compact mobile chrome and Visualization bottom sheet

fix(ui): keep Visualization collapse tab outside card chrome

feat(sae): Top-K Clean/Denoise with sparse encode I/O

feat(viz): add edge collapse tab for Visualization panel

feat(viz): sign filter and color anchors panel (v1.7.0)