Sister script of dev-ultra-restore.sh. Runs `npm run tauri dev` with
the full degraded-rendering env applied so the SW path can be
exercised even when the persisted graphics_settings DB has HW accel
enabled. Useful for testing the modal mount cost, splash spinner
smoothness, and Discovery V2 paint cost under WebKitGTK without GPU.
Sets five env vars:
QBZ_HARDWARE_ACCEL=0 (QBZ's own nuclear opt-out)
WEBKIT_DISABLE_COMPOSITING_MODE=1
WEBKIT_DISABLE_DMABUF_RENDERER=1
GSK_RENDERER=cairo (GTK4 SW renderer)
LIBGL_ALWAYS_SOFTWARE=1 (Mesa llvmpipe)
Flags:
--no-kill skip stale-process cleanup
--print print the env vars and exit (for sourcing)
cc
