v0.4.0

• ci: create GitHub release with changelog on version tag push (35b1398)
• chore: 0.4.0 (d1a9fba)
• fix: page arrows walk root-to-root, sidebar groups collapse to active (eb45694)
• fix: strip markup from meta description while keeping siteDescription raw (32be85d)
• feat: add customCss config option to append user overrides to bundle.css (5c902d1)
• fix: patch remaining high-severity vulns via npm overrides (3406197)
• fix: patch dependency vulnerabilities, migrate off unmaintained transformers.js fork (3595cdc)
• fix: scroll chat to top of latest message, not container bottom (1268202)
• feat: sentence-level snippet extraction and extractive quick answers (8f28f74)
• fix: slate theme code blocks broken by split-screen positioning hack (ff5d899)
• fix: nav group titles use folder name, not folder-index doc title (c4f686a)
• feat: group nav by top-level folder, style nested nav in all themes (286877a)
• feat: smarter title extraction fallback for markdown docs (ddfa87a)
• fix: slate theme footer broken by flex layout on main-content (0c1be07)
• fix: CLI theme default was silently overriding config file theme (7a575b0)
• add botdocs-config skill (3e50f3b)
• model download consent + AI use disclosure (f814cdf)
• man page added (2c4edaa)