feat(climate): configure climate.worldmonitor.app hostname variant

[koala73]

Summary

Configure climate.worldmonitor.app as a distinct hostname variant in the frontend, similar to existing tech, finance, happy, and commodity variants.

Changes

src/config/variant.ts

Add climate variant:

climate: {
  defaultPanels: ['climate-anomalies', 'co2-monitoring', 'climate-disasters', 'ocean-ice', 'air-quality', 'climate-news'],
  mapLayers: ['climate-anomalies-heatmap', 'disasters', 'air-quality', 'wildfire'],
  theme: { primaryColor: '#00AA55', accentColor: '#FF6600' },
  refreshIntervals: { anomalies: 3 * 60, co2: 24 * 60, disasters: 6 * 60, news: 30 },
  i18n: { title: 'Climate Intelligence', subtitle: 'Atmospheric, Ocean & Disaster Monitoring' },
}

Hostname Detection

Check existing subdomain detection logic (used for tech.worldmonitor.app, finance.worldmonitor.app, etc.) and add climate to the recognized variants.

Vercel

Add climate.worldmonitor.app to the project's domain list in Vercel dashboard.

Depends on

#2474