docs: remove design system footer

[Patrick-Erichsen]

Summary

• What changed: removed the Carapace version and design-system link block from the documentation sidebar, along with its unused CSS.
• Why: the docs navigation should end with ClawScan content rather than an implementation-detail footer.

Scope

• CLI behavior
• Scanner adapter
• Judge/profile/benchmark behavior
• ClawHub profile proposal at proposals/<GHSA-ID>/clawscan.yml
• Docs only
• Release/CI/repo automation

Security / Trust Impact

• No security/trust impact
• Security/trust impact explained

No scanner execution, judge commands, prompt/schema handling, secret redaction, benchmark submissions, or generated release artifacts change.

Verification

• go test -count=1 ./...
• go vet ./...
• go run ./cmd/clawscan --help
• Focused scanner/benchmark/manual proof: generated DOM checked in the Codex app browser at mobile, tablet, laptop, and desktop viewports; footer content and empty spacing are absent.
• For ClawHub profile proposals: I opened the sensitive report through GitHub private vulnerability reporting, and this PR contains only proposals/<GHSA-ID>/clawscan.yml
• For ClawHub profile proposals: I did not edit official bundled profile files under internal/profiles/
• Docs site proof (make docs-site) or N/A: make docs-site; node --check scripts/build-docs-site.mjs; node --check docs/assets/site.js; git diff --check

Notes

• Autoreview: clean, no accepted/actionable findings.
• Go tests and vet were not run because this two-file docs-shell change does not touch Go behavior.

[clawsweeper]

ClawSweeper status: review started.

I am starting a fresh review of this pull request: docs: remove design system footer This is item 1/1 in the current shard. Shard 0/1.

This placeholder means the worker is alive and reading the current context. I will edit this same comment with the actual review when the claws are done clicking.

Crustacean status: shell secured, claws on keyboard, evidence pebbles being sorted.