David Krauser c0c2ff2ad9 [MM-67314] Fix system bot DM restriction bypass (#35477)
When TeamSettings.RestrictDirectMessage is set to "team", the system bot could not create DM channels with users on different teams (or no shared team). This broke SendTestMessage, CheckPostReminders, and other background jobs that use an empty session context.

The existing bypass in GetOrCreateDirectChannel only covered bots owned by the current session user or a plugin. The system bot is owned by a system admin, so it failed the ownership check and hit the common-team guard.

Changes:
- Rename IsBotOwnedByCurrentUserOrPlugin to IsBotExemptFromDMRestrictions to better reflect its purpose
- Add an explicit system bot exemption (bot.Username == BotSystemBotUsername) as the first check in the function
- Add tests covering the system bot exemption with both empty and user sessions
2026-03-09 14:08:30 -04:00
2018-05-30 10:23:25 -04:00

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