- Add vue/no-restricted-class ESLint rule to catch dark: prefix usage
- Fix existing violation in FormImageUpload.vue (dark: -> dark-theme:)
- Ensures consistent usage of project's custom Tailwind variant
- Violations will fail builds and be caught during development
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-authored-by: Claude <noreply@anthropic.com>
