R4: Inline carrier credential + failover rank edit

Regenerated from nervly-app@563ea6b052461ddc1555a31ed583646750c6b7ac on 2026-10-08T15:40:43.789Z.

• Route: /routing
• Status: reachable

Steps

Step 1: Inline carrier credential + failover rank edit

Edit priority (1-999) → commit; edit credential (≥8 chars) → commit → re-encrypted toast