Prompt reload when chat.disableAIFeatures setting changes

[Copilot]

The chat.disableAIFeatures setting requires a window reload to take effect, but no prompt was shown to users after changing it.

Changes

Added chat.disableAIFeatures to SettingsChangeRelauncher in /src/vs/workbench/contrib/relauncher/browser/relauncher.contribution.ts:

• Added setting to monitored SETTINGS array
• Added disableAIFeatures ChangeObserver to track value changes
• Added change detection logic in update() method
• Updated IConfiguration interface with disableAIFeatures property

When the setting changes, users now see a confirmation dialog with a "Reload" button. This follows the existing pattern used for other reload-requiring settings like chat.extensionUnification.enabled and telemetry.feedback.enabled.

Testing

Toggle chat.disableAIFeatures in Settings UI or JSON. Verify reload prompt appears with option to reload window immediately.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>show 'Reload to take effect' modal/notification when enabling chat.disableAIFeatures</issue_title>
<issue_description>

Does this issue occur when all extensions are disabled?: Yes/No

I noticed that some AI features need a reload after flipping chat.disableAIFeatures. Lets prompt the user to reload so the editor works as expected? We have precedent for this with other settings.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes show 'Reload to take effect' modal/notification when enabling chat.disableAIFeatures #281975

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.