feat(msg): announcements 公告模块 + sendBatch 批量优化 + 权限扩展 + nextstep 文档

This commit is contained in:
SpecialX
2026-07-14 15:57:41 +08:00
parent 7dd5c44406
commit fb23c5234e
28 changed files with 3644 additions and 7 deletions

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{"userId":"student-001"}