R2: Channel priority cascade reorder

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

• Route: /routing
• Status: reachable

Steps

Step 1: Channel priority cascade reorder

Move sms/voice/etc. up/down → optimistic reorder → undo toast; proposed-vs-applied diff appears