/harden — Production Resilience

Make the interface survive real-world conditions:

1. Text overflow — Add text-overflow: ellipsis where needed. Handle long words with overflow-wrap: break-word.
2. Error states — Form validation messages, failed API calls, empty results.
3. Loading states — Skeleton screens, spinner on buttons, progressive loading.
4. i18n readiness — No hardcoded widths that break with longer translations. RTL-safe spacing (use logical properties: padding-inline, margin-block).
5. Missing content — Fallback for missing images, empty lists, null data.
6. Browser support — Check for CSS feature support with @supports.