- Set conversationScene=EXTERNAL in SendEndToEndTest and align account to WECHAT_PERSONAL
- Replace literal account type code with AccountType.WECHAT_PERSONAL.getCode()
- Use replaceFirst for webhook URL placeholder in WeComBotSender
- Remove unused selectDefaultAccount overload
- Hide scene selector for single-chat conversations in admin-web
- WeComBotSender.resolveWebhookUrl: use custom URL as-is when no %s placeholder
- WeComBotSender: treat unparseable/blank response body as failure
- ConversationService.isAccountCompatibleWithConversation: ignore scene for single chats
- SendService.selectSendAccountCandidates: apply accountTypes filter for non-conversation records
- SendService: replace account type magic numbers with AccountType constants
- WeComChannelAdapter: use AccountType.WECOM_BOT.getCode() instead of literal 6
- admin-web Conversation.vue: fallback to channelType filter when scene is unset
- add tests for single-chat null scene, webhook_url propagation, and custom URL without %s
- Copy account.ext_info into extra.webhook_url for WECOM_BOT sends.
- Allow null conversation_scene for single chats; only enforce scene-based routing for group chats.
- Harden WeComBotSender custom URL handling when placeholder is missing.
- Persist conversationScene in create/update conversation
- Make bindAccount validate by conversation scene (1=WECOM_BOT, 2=WECHAT_PERSONAL)
- Re-derive channelType from conversation_scene in dispatchRecord
- Check WeCom response errcode and HTTP status in WeComBotSender
- Support custom webhook_url from ext_info in WeComBotSender
- Configure RestTemplate with 5s connect / 10s read timeouts
- Expand WeComBotSenderTest with MockRestServiceServer coverage
