The Apps launcher (`rofi -show drun -theme launcher`) imported
`custom.rasi` — the name HM gives *generated* themes — but a whole-swap
theme's base is deployed under its source basename (`rofi.rasi`), so the
import resolved against $HOME and rofi errored with "custom.rasi not
found" on every whole-swap theme. Make the default import track the
active base (rofi.rasi for whole-swaps, custom.rasi otherwise) and point
Boreal's own launcher.rasi at rofi.rasi.
Also give Boreal's app grid `flow: horizontal` so Down at a column's foot
pages to the next screen instead of jumping to the next column's top,
mirroring the theme-picker grid.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>