feat: redesign explorer and models pages with react-ui theme
- Updated logo and branding to match LocalAI's current design
- Applied react-ui color scheme and CSS variables throughout
- Added grid/list view toggle for models page
- Implemented enhanced filter chips with active state highlighting
- Added sort options and improved pagination
- Redesigned explorer page cards and token display
- Modernized navbar styling with sticky positioning
- Improved modal design with inline actions
- Ensured mobile-responsive design maintained
Co-authored-by: localai-bot <localai-bot@noreply.github.com>
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