🚀 feat: expose “Enabled Groups” for models with real-time refresh

Backend
• model/model_meta.go
  – Added `EnableGroups []string` to Model struct
  – fillModelExtra now populates EnableGroups

• model/model_groups.go
  – New helper `GetModelEnableGroups` (reuses Pricing cache)

• model/pricing_refresh.go
  – Added `RefreshPricing()` to force immediate cache rebuild

• controller/model_meta.go
  – `GetAllModelsMeta` & `SearchModelsMeta` call `model.RefreshPricing()` before querying, ensuring groups / endpoints are up-to-date

Frontend
• ModelsColumnDefs.js
  – Added `renderGroups` util and “可用分组” table column displaying color-coded tags

Result
Admins can now see which user groups can access each model, and any ability/group changes are reflected instantly without the previous 1-minute delay.

web/src/components/table/models/ModelsColumnDefs.js

@@ -91,6 +91,19 @@ const renderDescription = (text) => {
   );
 };
 
+// Render groups (enable_groups)
+const renderGroups = (groups) => {
+  if (!groups || groups.length === 0) return '-';
+  return renderLimitedItems({
+    items: groups,
+    renderItem: (g, idx) => (
+      <Tag key={idx} size="small" shape='circle' color={stringToColor(g)}>
+        {g}
+      </Tag>
+    ),
+  });
+};
+
 // Render tags
 const renderTags = (text) => {
   if (!text) return '-';
@@ -232,6 +245,11 @@ export const getModelsColumns = ({
       dataIndex: 'bound_channels',
       render: renderBoundChannels,
     },
+    {
+      title: t('可用分组'),
+      dataIndex: 'enable_groups',
+      render: renderGroups,
+    },
     {
       title: t('创建时间'),
       dataIndex: 'created_time',