feat: add WeChat MP channel support and enhance widget configuration

- Updated output path for generated enums to reflect new structure.
- Enhanced ChannelController to handle WeChat MP OAuth authorization and callback.
- Introduced WechatMPChannelConfig DTO for WeChat MP specific configurations.
- Modified WidgetConfigResponse to include channel type and external source.
- Added enums for WeChat MP channel type and external source.
- Implemented OAuth flow for WeChat MP, including state signing and verification.
- Updated frontend forms to accommodate WeChat MP configurations.
- Enhanced API interactions to support WeChat MP external ID and source.
- Updated generated enums to include WeChat MP external source.

web/lib/generated/enums.ts

@@ -73,10 +73,12 @@ export const ContactTypeLabels: Record<ContactType, string> = {
 
 export enum ExternalSource {
   WebChat = "web_chat",
+  WechatMP = "wechat_mp",
   WxWorkKF = "wxwork_kf",
 }
 export const ExternalSourceLabels: Record<ExternalSource, string> = {
   [ExternalSource.WebChat]: "网页客服",
+  [ExternalSource.WechatMP]: "微信公众号",
   [ExternalSource.WxWorkKF]: "企业微信客服",
 }