Move serverkit-gpu from CONVERTED_BUILTIN_SLUGS into GATED_BUILTIN_SLUGS behind
a _gpu_present() predicate (shutil.which('nvidia-smi')), mirroring the email
gate: fresh installs stay marketplace-only, upgraded panels without a GPU no
longer get it, upgraded panels with a GPU keep it (D3 continuity). Rewrite the
12 builtin + baked extension descriptions that used em dashes into plain
sentences, keeping every pair in sync. New test_extension_manifests.py walks
both manifest trees to assert no em/en dashes and per-slug description parity.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
serverkit-crowdsec surfaces decisions/alerts, ban/unban and allowlists
via cscli with feature detection and graceful degradation when CrowdSec
is absent. Installs from Marketplace Browse; no core changes.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
