Update dependency tailwindcss to v3.0.19

Editor assessment

A maintenance commit that gets the mechanics exactly right. chore(deps) is the community-standard prefix for routine upgrades, 'update dependency tailwindcss to v3.0.19' is imperative, lowercase, period-free, and names the precise target version. The subject sits well within the 72-character ceiling. What separates a good message from a great one — a sentence on why, or on any config fallout from the 3.0.x series — is absent, leaving reviewers to consult the diff. Still, for changelog automation and dependency dashboards this is precisely the shape of message tooling loves: unambiguous, parseable, and zero-noise.