feat: support Tencent's model (close #519)

web/src/constants/channel.constants.js

@@ -8,6 +8,7 @@ export const CHANNEL_OPTIONS = [
   { key: 18, text: '讯飞星火认知', value: 18, color: 'blue' },
   { key: 16, text: '智谱 ChatGLM', value: 16, color: 'violet' },
   { key: 19, text: '360 智脑', value: 19, color: 'blue' },
+  { key: 23, text: '腾讯混元', value: 23, color: 'teal' },
   { key: 8, text: '自定义渠道', value: 8, color: 'pink' },
   { key: 22, text: '知识库：FastGPT', value: 22, color: 'blue' },
   { key: 21, text: '知识库：AI Proxy', value: 21, color: 'purple' },