Environment Variables moved from Resources into a dedicated "Variables"
tab, placed first in the tab order since it's the most commonly needed
config when creating new apps.
Tab order:
- Create page: Variables | Monitoring | Resources
- Detail page: Variables | Monitoring | Traces & Taps | Route Recording | Resources
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>