Refactor(Go): remove hardcode in huggingface provider (#14822)

### What problem does this PR solve?

remove hardcode in `huggingface` provider

### Type of change

- [x] Refactoring

conf/models/huggingface.json

@@ -1,7 +1,7 @@
 {
   "name": "HuggingFace",
   "url": {
-    "default": "https://router.huggingface.co/v1/"
+    "default": "https://router.huggingface.co/v1"
   },
   "url-suffix": {
     "chat": "chat/completions",

internal/entity/models/huggingface.go

@@ -26,12 +26,6 @@ func NewHuggingFaceModel(baseURL map[string]string, urlSuffix URLSuffix) *Huggin
 		URLSuffix: urlSuffix,
 		httpClient: &http.Client{
 			Timeout: 120 * time.Second,
-			Transport: &http.Transport{
-				MaxIdleConns:        10,
-				MaxIdleConnsPerHost: 100,
-				IdleConnTimeout:     90 * time.Second,
-				DisableCompression:  false,
-			},
 		},
 	}
 }
@@ -41,12 +35,6 @@ func (h *HuggingFaceModel) NewInstance(baseURL map[string]string) ModelDriver {
 		URLSuffix: h.URLSuffix,
 		httpClient: &http.Client{
 			Timeout: 120 * time.Second,
-			Transport: &http.Transport{
-				MaxIdleConns:        10,
-				MaxIdleConnsPerHost: 100,
-				IdleConnTimeout:     90 * time.Second,
-				DisableCompression:  false,
-			},
 		},
 	}
 }
@@ -204,7 +192,7 @@ func (h *HuggingFaceModel) ChatStreamlyWithSender(modelName string, messages []M
 		region = *apiConfig.Region
 	}
 
-	url := fmt.Sprintf("%s/chat/completions", h.BaseURL[region])
+	url := fmt.Sprintf("%s/%s", h.BaseURL[region], h.URLSuffix.Chat)
 
 	// Convert messages to API format
 	apiMessages := make([]map[string]interface{}, len(messages))
@@ -356,6 +344,11 @@ func (h *HuggingFaceModel) Embed(modelName *string, texts []string, apiConfig *A
 		return []EmbeddingData{}, nil
 	}
 
+	region := "default"
+	if apiConfig != nil && apiConfig.Region != nil && *apiConfig.Region != "" {
+		region = *apiConfig.Region
+	}
+
 	if modelName == nil || *modelName == "" {
 		return nil, fmt.Errorf("model name is required")
 	}
@@ -373,7 +366,7 @@ func (h *HuggingFaceModel) Embed(modelName *string, texts []string, apiConfig *A
 		return nil, err
 	}
 
-	url := fmt.Sprintf("https://router.huggingface.co/hf-inference/models/%s", *modelName)
+	url := fmt.Sprintf("%s/%s/%s", h.BaseURL[region], h.URLSuffix.Embedding, *modelName)
 
 	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
 	if err != nil {