chore: bump version to v2026.4.314 and add color-scheme support}
- Bump version from v2026.4.313 to v2026.4.314 across docs and package.json - Update CSS cache-busting hash in package.json and themes.js - Add color-scheme: dark to .p3x-gitlist-dark for proper OS-level dark mode - Add color-scheme: light to new .p3x-gitlist-light class - Change dropdown scroll max-height from fixed 300px to calc(100vh - 80px) - Add changelog entry for v2026.4.314