phsl / new-api

The sidebar’s admin section now displays “Channel Management” before “Model Management” to better reflect common user workflows and improve navigation clarity.

Details:
• Updated `web/src/components/layout/SiderBar.js`
  – Re-ordered items in `adminItems` array so `channel` precedes `models`.
• No logic or route changes; this is purely a UI ordering adjustment.

This change enhances usability for administrators by presenting frequently accessed channel settings first.