- Sidebar user-side order: /available-channels now sits directly above
/monitor (渠道状态) for regular users, mirroring the admin section where
it sits above /admin/channels.
- GroupBadge gains an alwaysShowRate prop. Subscription groups default to
a "订阅"/days-remaining label; the new flag swaps that for the rate
multiplier while keeping the subscription theme color, so the Available
Channels page can surface rates on every group type.