Document v11.8 classification markings and banners

[Combs7th]

Documents Mattermost v11.8 classification markings and banners (engineering PRs mattermost/mattermost#36231 MM-68196 and #36490 MM-68197, milestone v11.8.0).

• Adds a Classification markings section to the end-user display-channel-banners page.
• Adds a Classification Markings section and Site Configuration list entry to site-configuration-settings.

Classification markings are informational only and don't control access. Scoped to web and desktop apps.

Resolves #9031

Generated with Claude Code

[github-actions]

Newest code from mattermost has been published to preview environment for Git SHA fca7c9a

[Combs7th]

@avasconcelos114 - Would you say the above updates suffice for classification banners? Tried my best to keep Claude concise and not overexplain.

I also can't tag David K for 2nd approval on this one since it looks like he's out on PTO till after release day.

[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request adds documentation for the new Classification Markings feature in Mattermost v11.8. The changes introduce admin configuration guidance in the site configuration settings and explain end-user visibility of classification banners in the channel banners documentation.

Changes

Classification Markings Documentation

Layer / File(s)	Summary
Admin configuration documentation source/administration-guide/configure/site-configuration-settings.rst	Navigation entry for Classification Markings is added to the System Console configuration list. A new section provides an overview of classification markings, notes their informational nature, and describes step-by-step configuration instructions including enabling the feature, selecting presets or custom levels, configuring banners, and choosing banner visibility options.
End-user classification markings documentation source/end-user-guide/collaborate/display-channel-banners.rst	New subsection explains that classification markings are configured by system admins to appear as global or channel-level banners in web and desktop apps. Classification markings use predefined or custom classification levels with names and banner colours, are informational in nature, and take priority over custom channel banners when both are configured for the same channel.

Estimated Code Review Effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: documentation of v11.8 classification markings and banners feature.
Description check	✅ Passed	The description is directly related to the changeset, providing context about the documentation additions and linked issues.
Linked Issues check	✅ Passed	The PR meets the linked issue #9031 requirements: documents classification markings/banners for v11.8, updates existing pages instead of creating new ones, focuses on user/admin-visible changes without implementation details, and targets the specified personas.
Out of Scope Changes check	✅ Passed	All changes are in-scope documentation updates directly related to classification markings and banners feature documentation as specified in issue #9031.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/issue-9031-20260613-0035

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@source/end-user-guide/collaborate/display-channel-banners.rst`:
- Line 43: The :ref: target for the "Classification Markings" link is malformed
— replace the space-separated label "classification markings" with the
hyphenated section label used in the docs (e.g., "classification-markings") in
the string inside the existing :ref: markup (the fragment currently reading
:ref:`Classification Markings
<administration-guide/configure/site-configuration-settings:classification
markings>`); update that reference so it becomes :ref:`Classification Markings
<administration-guide/configure/site-configuration-settings:classification-markings>`
to ensure the internal link resolves correctly.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c5a1edc0-6a77-4828-a7a8-30a032cbd5b2

📥 Commits

Reviewing files that changed from the base of the PR and between ea7ca0d and fca7c9a.

📒 Files selected for processing (2)

• source/administration-guide/configure/site-configuration-settings.rst
• source/end-user-guide/collaborate/display-channel-banners.rst

[github-actions]

Newest code from mattermost has been published to preview environment for Git SHA e92bcfa

[Combs7th]

@wiersgallak - This one will need editor review as well after dev review is complete.

[avasconcelos114]

Simple and to the point! The setup instructions are accurate 👍