feat: add mobile responsiveness to space management dashboard

Improved mobile experience for space management interface:
- Responsive table layouts with adaptive column visibility
- Mobile-optimized button groups and navigation
- Responsive padding and font sizes throughout
- Better touch targets for mobile interactions
- Stacked layouts on smaller screens

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: kanekoshoyu