🚀 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.

model/pricing.go

@@ -118,15 +118,19 @@ func updatePricing() {
 	for _, m := range prefixList {
 		for _, pricingModel := range enableAbilities {
 			if strings.HasPrefix(pricingModel.Model, m.ModelName) {
-				metaMap[pricingModel.Model] = m
-			}
+                if _, exists := metaMap[pricingModel.Model]; !exists {
+                    metaMap[pricingModel.Model] = m
+                }
+            }
 		}
 	}
 	for _, m := range suffixList {
 		for _, pricingModel := range enableAbilities {
 			if strings.HasSuffix(pricingModel.Model, m.ModelName) {
-				metaMap[pricingModel.Model] = m
-			}
+                if _, exists := metaMap[pricingModel.Model]; !exists {
+                    metaMap[pricingModel.Model] = m
+                }
+            }
 		}
 	}
 	for _, m := range containsList {
@@ -205,8 +209,12 @@ func updatePricing() {
             SupportedEndpointTypes: modelSupportEndpointTypes[model],
         }
 
-        // 补充模型元数据（描述、标签、供应商等）
+        // 补充模型元数据（描述、标签、供应商、状态）
         if meta, ok := metaMap[model]; ok {
+            // 若模型被禁用(status!=1)，则直接跳过，不返回给前端
+            if meta.Status != 1 {
+                continue
+            }
             pricing.Description = meta.Description
             pricing.Tags = meta.Tags
             pricing.VendorID = meta.VendorID