✨ feat(ratio-sync): support /api/pricing parsing, confidence verification & UI enhancements

Backend
- controller/ratio_sync.go
  • Parse /api/pricing response and convert to ratio / price maps.
  • Introduce confidence heuristic (model_ratio = 37.5 && completion_ratio = 1) to flag unreliable data.
  • Include confidence map when building differences and filter “same”/empty entries.
- dto/ratio_sync.go
  • Add `ID` to UpstreamDTO, `upstreams` to UpstreamRequest, and `Confidence` to DifferenceItem.

Frontend
- ChannelSelectorModal.js
  • Re-implement with table layout, pagination, search, endpoint-type selector and mobile support.
- UpstreamRatioSync.js
  • Send full upstream objects, add ratio-type filter, confidence badges/tooltips, retain endpoints.
  • Leverage ChannelSelectorModal’s pagination reset.
- ChannelsTable.js – fix tag color for disabled status.
- en.json – add translations for new UI labels.

Motivation
These changes let users sync model ratios / prices from different upstream endpoints and visually identify potentially unreliable data, improving operational safety and flexibility.

web/src/components/table/ChannelsTable.js

@@ -114,7 +114,7 @@ const ChannelsTable = () => {
         );
       case 2:
         return (
-          <Tag size='large' color='yellow' shape='circle' prefixIcon={<XCircle size={14} />}>
+          <Tag size='large' color='red' shape='circle' prefixIcon={<XCircle size={14} />}>
             {t('已禁用')}
           </Tag>
         );