* feat(platform): implement ImageSender for Discord, Slack, DingTalk, WeChat Work, QQ, QQBot
Add SendImage support to 6 platforms that previously only supported
receiving images. Each implementation follows the platform's native
API for uploading and sending images:
- Discord: ChannelMessageSendComplex with discordgo.File attachment
- Slack: UploadFileV2Context with thread support
- DingTalk: media upload + oToMessages API (refactored uploadMedia
to support both voice and image media types)
- WeChat Work: media upload + message send API
- QQ (OneBot v11): base64-encoded image segments via WebSocket
- QQBot (Official API v2): rich media upload + msg_type 7
LINE is excluded as its API requires externally hosted image URLs.
* fix(platform): address code review findings in SendImage
Discord:
- Fix io.Reader exhaustion: use newFile() factory for fresh reader on fallback
- Handle firstDone state machine for interactions (mirror sendInteraction pattern)
DingTalk:
- Read response body on success for debugging (mirror SendAudio pattern)
- Use json.Marshal for msgParam instead of fmt.Sprintf
QQBot:
- Handle http.NewRequest error on 401 retry path (prevent nil panic)
Sean
1d15effd2e