fix deepseek api url

internal/handler/deepseek.go

@@ -34,7 +34,7 @@ func HandleDeepSeek(w http.ResponseWriter, r *http.Request, body []byte, apiKey
 	var req map[string]interface{}
 	json.Unmarshal(body, &req)
 	newBody, _ := json.Marshal(req)
-	proxyReq, _ := http.NewRequest("POST", "https://chat.deepseek.com/api/v0/chat/completions", bytes.NewReader(newBody))
+	proxyReq, _ := http.NewRequest("POST", "https://chat.deepseek.com/api/v1/chat/completions", bytes.NewReader(newBody))
 	proxyReq.Header.Set("Authorization", "Bearer "+deepseekToken)
 	proxyReq.Header.Set("Content-Type", "application/json")
 	proxyReq.Header.Set("User-Agent", "Mozilla/5.0")