[kvlonge]

Why

Apply the approved SQLStack parent-brand treatment while keeping SQLClean primary and preserving its existing styling.

Changes

• Linked by SQLStack beneath the homepage/docs wordmark, aligned with its text.
• Balanced 80px header; centered navigation/search and correct sticky offsets.
• Approved light/dark SQLStack symbols, Part of SQLStack and four family links in both footers; docs pagination retained.
• Symbols copied unchanged from sqlstack-io/sqlstack revision 9b37b9e with provenance.
• Website only. Product README promotion and packaged documentation are unchanged. Cloudflare Pages deploys automatically after merge; no package release.

Verification

• Website build/link check: 21 pages, 0 broken links.
• 24 Chromium cases: homepage/docs, light/dark, widths 320/390/680/800/960/1440; balanced padding, centered controls, no overflow, links/theme assets, anchor/sidebar/TOC offsets, theme switching and touch-emulated menus.
• Inspected all eight desktop/mobile light/dark header/footer captures and a pointer interaction recording.
• Docs skill synchronization, ruff format/lint, public repository hygiene and diff checks passed.