Improve error page UX: reduce alarm, promote recovery action
Key changes:
- Red only on icon, neutral title/button (error ≠ danger, error = interruption)
- Left-align text inside centered card (improves scannability)
- Reduce icon size from 48px to 40px
- Button is neutral white/border, not red (red implies destructive action)
- CTA says "Reload page" (matches actual action, not vague "Try Again")
- Subtle card surface lift in dark mode instead of pure black void
- Error reference moved below button, de-emphasized with smaller font
- Removed developer hints from production
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
