🚀 refactor: refine pricing refresh logic & hide disabled models

Summary
-------
1. Pricing generation
   • `model/pricing.go`: skip any model whose `status != 1` when building
     `pricingMap`, ensuring disabled models are never returned to the
     front-end.

2. Cache refresh placement
   • `controller/model_meta.go`
     – Removed `model.RefreshPricing()` from pure read handlers
       (`GetAllModelsMeta`, `SearchModelsMeta`).
     – Kept refresh only in mutating handlers
       (`Create`, `Update`, `Delete`), guaranteeing data is updated
       immediately after an admin change while avoiding redundant work
       on every read.

Result
------
Front-end no longer receives information about disabled models, and
pricing cache refreshes occur exactly when model data is modified,
improving efficiency and consistency.

controller/model_meta.go

@@ -13,8 +13,6 @@ import (
 // GetAllModelsMeta 获取模型列表（分页）
 func GetAllModelsMeta(c *gin.Context) {
 
-    model.RefreshPricing()
-
     pageInfo := common.GetPageQuery(c)
     modelsMeta, err := model.GetAllModels(pageInfo.GetStartIdx(), pageInfo.GetPageSize())
     if err != nil {
@@ -35,8 +33,6 @@ func GetAllModelsMeta(c *gin.Context) {
 // SearchModelsMeta 搜索模型列表
 func SearchModelsMeta(c *gin.Context) {
 
-    model.RefreshPricing()
-
     keyword := c.Query("keyword")
     vendor := c.Query("vendor")
     pageInfo := common.GetPageQuery(c)
@@ -87,6 +83,7 @@ func CreateModelMeta(c *gin.Context) {
         common.ApiError(c, err)
         return
     }
+    model.RefreshPricing()
     common.ApiSuccess(c, &m)
 }
 
@@ -116,6 +113,7 @@ func UpdateModelMeta(c *gin.Context) {
             return
         }
     }
+    model.RefreshPricing()
     common.ApiSuccess(c, &m)
 }
 
@@ -131,6 +129,7 @@ func DeleteModelMeta(c *gin.Context) {
         common.ApiError(c, err)
         return
     }
+    model.RefreshPricing()
     common.ApiSuccess(c, nil)
 }
 
@@ -149,5 +148,4 @@ func fillModelExtra(m *model.Model) {
     m.EnableGroups = model.GetModelEnableGroups(m.ModelName)
     // 填充计费类型
     m.QuotaType = model.GetModelQuotaType(m.ModelName)
-
 }