[whoalin1]

Summary

Closes #1513

Add an explicit prerequisite on the web based updater page: review and disable all 3rd party apps before opening the updater, then re-enable after a successful upgrade — matching the guidance already in upgrade.rst.

Test plan

• Docs build for update.rst
• Cross-link to :doc:upgrade`` resolves

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AI disclosure

This PR was drafted with the help of AI coding assistants (Cursor agents / LLM-based tools), including the description. I am responsible for it and happy to rework anything that doesn't fit.

All commits carry an Assisted-by: Cursor:grok-4.7 trailer.

[skjnldsv]

Closing, because this goes the opposite way from #1513. Morris answered there that it isn't needed, as incompatible apps are disabled automatically during the upgrade (#1513 (comment)), and that the existing sentence should be removed rather than repeated.

A PR that drops that sentence from admin_manual/maintenance/upgrade.rst would be welcome and would actually fix #1513.

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