chore(master): release 2.84.0

[github-actions]

🤖 I have created a release beep boop

2.84.0 (2026-10-15)

Features

• admin: replace bull-board with an in-house queue browser (4215616)
• per-account IDLE restart interval (imap.maxIdleTime) (25e5cb7)

Bug Fixes

• admin: format the queue help panel and keep a leading kebab menu on the page (ed51305)
• admin: move a queue entry's actions to the page header and explain what the queues keep (9ace194)
• admin: post queue entry actions as plain forms (e335331)
• admin: say which bound decides the failed-entry count on the queue page (7224cd7)
• deps: update bullmq to 6.3.15 (b58b632)
• deps: update imapflow to 2.4.3 and dotenv to 18.0.8 (c28955b)
• deps: update nodemailer to 10.1.1, imapflow to 2.4.2 and libmime to 5.4.8 (ff766dd)
• skip DSN parsing when the message was expunged before it was downloaded (44113d5)

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[github-actions]

🤖 Created releases:

• v2.84.0

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