🚀 feat(pricing): clarify “auto” group routing chain and exclude it from price table

Detailed changes
Backend
• `controller/pricing.go` now includes `auto_groups` in `/api/pricing` response, sourced from `setting.AutoGroups`.

Frontend
• `useModelPricingData.js`
  – Parses `auto_groups` and exposes `autoGroups` state.
• `PricingPage.jsx` → `ModelDetailSideSheet.jsx` → `ModelPricingTable.jsx`
  – Thread `autoGroups` through component tree.
• `ModelPricingTable.jsx`
  – Removes deprecated `getGroupDescription` / `Tooltip`.
  – Filters out `auto` when building price table rows.
  – Renders a descriptive banner: “auto 分组调用链路 → auto → group1 → …”, clarifying fallback order without showing prices.
• Minor i18n tweak: adds `auto分组调用链路` key for the banner text.

Why
Users were confused by the “auto” tag appearing alongside regular groups with no price.
This change:
1. Makes the routing chain explicit.
2. Keeps the pricing table focused on billable groups.

No breaking API changes; existing clients can ignore the new `auto_groups` field.

web/src/components/table/model-pricing/modal/ModelDetailSideSheet.jsx

@@ -39,7 +39,6 @@ const ModelDetailSideSheet = ({
   visible,
   onClose,
   modelData,
-  selectedGroup,
   groupRatio,
   currency,
   tokenUnit,
@@ -48,6 +47,7 @@ const ModelDetailSideSheet = ({
   usableGroup,
   vendorsMap,
   endpointMap,
+  autoGroups,
   t,
 }) => {
   const isMobile = useIsMobile();
@@ -86,13 +86,13 @@ const ModelDetailSideSheet = ({
             <ModelEndpoints modelData={modelData} endpointMap={endpointMap} t={t} />
             <ModelPricingTable
               modelData={modelData}
-              selectedGroup={selectedGroup}
               groupRatio={groupRatio}
               currency={currency}
               tokenUnit={tokenUnit}
               displayPrice={displayPrice}
               showRatio={showRatio}
               usableGroup={usableGroup}
+              autoGroups={autoGroups}
               t={t}
             />
           </>