Docs: Remove sessionRetention namespace from settings reference

[afarber]

Summary

Remove incorrectly documented general.sessionRetention from settings reference. This container/namespace setting has showInDialog: false and was never meant to appear in the UI or docs.

Details

The sessionRetention setting is a container object that groups related settings (enabled, maxAge, maxCount, minRetention). Only its child sessionRetention.enabled has showInDialog: true and appears in the /settings UI. The docs had an extra row documenting the parent container as if it were a standalone setting.

Related Issues

Fixes #14623

How to Validate

1. Open docs/cli/settings.md and verify general.sessionRetention row is gone
2. Verify general.sessionRetention.enabled row is still present
3. Run gemini and type /settings - the "Enable Session Cleanup" option should be visible under General (unchanged behaviour)

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• Added/updated tests (if needed)
• Noted breaking changes (if any)
• Validated on required platforms/methods:
  • MacOS
    • npm run
    • npx
    • Docker
    • Podman
    • Seatbelt
  • Windows
    • npm run
    • npx
    • Docker
  • Linux
    • npm run
    • npx
    • Docker

[gemini-code-assist]

Summary of Changes

Hello @afarber, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the documentation for session retention settings by removing an entry that was erroneously included. The change ensures that the settings reference accurately reflects which settings are visible in the user interface and intended for user interaction, thereby improving the clarity and correctness of the documentation.

Highlights

• Documentation Correction: Removed the general.sessionRetention entry from the docs/cli/settings.md file, as it was incorrectly documented.
• Setting Visibility: The general.sessionRetention setting is a container/namespace with showInDialog: false, meaning it should not appear in the UI or documentation. Only its child setting, general.sessionRetention.enabled, is intended for display.

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[gemini-code-assist]

Code Review

This pull request correctly removes the general.sessionRetention setting from the CLI settings documentation. This setting is a container object not intended for direct user interaction, and its removal from the documentation aligns with its showInDialog: false property in the settings schema. The change makes the documentation accurately reflect the settings presented in the UI. The modification is confined to the documentation and is appropriate and correct.