SonarCloud flags every bare [ conditional in bash scripts under packaging/ as a reliability smell (rule S7688). Convert the flagged [ ... ] tests to [[ ... ]]: safer word-splitting and no glob surprises, same semantics for these string and file tests.
The web build always starts eframe's wgpu runner; only `?webgl` changes
the backend. `?cpu` selected the same renderer as no flag, so drop it
from the renderer table (and the HOSTING.md shipped in the web archive).
Fixes#126.
Co-authored-by: lloyd <lloyd@stackworx.io>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>