Convert hardcoded rgba colors across all dashboard CSS files to use
--ok-bg, --warn-bg, --alert-bg tokens from tokens.css per §8e design
system. Home page status banner and card tags now use proper semantic
tokens. Add layout.css import to live.html for shared nav structure.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
- Floor plan upload panel with image selection and preview
- Two-point calibration UI with pixel distance measurement
- Real-world distance input for scale computation
- Pixel-to-meter scale factor calculation and storage
- Fixed floor plan image serving at /floorplan/image.png
- Integration with Viz3D ground plane texture
- CSS styling for floor plan setup panel
- Image persists across server restart via SQLite
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>