fix: Update dependencies and fix security vulnerabilities

- Fix 4 security vulnerabilities (critical: basic-ftp, high: rollup & minimatch, moderate: ajv)
- Update tailwindcss 4.1.18 → 4.2.1, @tailwindcss/vite 4.1.18 → 4.2.1
- Update eslint 10.0.0 → 10.0.2, jsdom 28.0.0 → 28.1.0
- Update @lhci/cli 0.14.0 → 0.15.1
- Fix doc-page test to match pre-rendered HTML implementation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: raifdmueller