fix: fix webhook ui

perf: use yarn instead of npm

feat: set auto refresh is on by default

fix: fix cookie path

fix: use previous secret if not given

docs: update README

fix: add X-Accel-Buffering header on SSE response

fix: fix message segmentation in Telegram's markdown parse mode (close …

…#88)

feat: now message editor will save the selected channel as default ch…

…annel

feat: support tencent custom alarm now (close #87)