[FEATURE] Setting to suppress update notification without disabling auto-update

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Claude Code shows a persistent "update installed • restart to update" message after auto-updating. The only existing controls (DISABLE_AUTOUPDATER, autoUpdatesChannel, minimumVersion) suppress this by disabling the update itself, rather than just the notification. I want updates to keep installing automatically in the background, but without the recurring message.

Proposed Solution

Add a settings.json flag such as "suppressUpdateNotification": true that hides the "update installed • restart to update" message while leaving the auto-updater fully functional. Auto-update continues as normal; only the notification is silenced.

Alternative Solutions

The only current workaround is setting DISABLE_AUTOUPDATER: 1, but that also stops updates from installing, which isn't what I want.

Priority

Low - Nice to have

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_