- Add /ambient route serving dedicated ambient.html page
- Simplified top-down floor plan using Canvas 2D (no Three.js)
- Time-of-day aware palettes: morning (bright/cool), day (neutral), evening (warm amber), night (dim)
- People rendered as glowing colored dots (BLE-identified) or neutral dots (unknown)
- Room labels with occupancy counts
- Auto-dim after 30 minutes of inactivity
- Alert mode with pulsing red border and action buttons
- Morning briefing integration with auto-dismiss
- WebSocket for real-time blob and zone updates
- Lightweight implementation targeting <30 MB RAM for older tablets
- OLED-safe night mode with true black background
