- Add official HiHala logo SVG (text portion from v1.5)
- Replace text-based nav brand with logo image + 'Museums Data'
- Update data source to default to NocoDB with Sheets fallback
- Move all credentials to environment variables (.env.local)
- Global data labels toggle in header (works on Dashboard & Comparison pages)
- Labels show formatted values (K/M suffix, max 2 decimals) with white pill background
- Capture Rate chart now shows pilgrims as curved line on right Y-axis
- Revenue Trends toggle moved to top-right corner of chart container
- Mobile: bottom navigation bar with Dashboard, Compare, Labels toggle
- Mobile: top nav simplified to brand only, bottom nav is thumb-friendly
