Auto-updater notice is a bright, attention-grabbing banner even though the rest of the UI is uncolored

Feature request

When Claude Code silently downloads and installs a background update, it shows an "Update installed · Restart to update" notice in the terminal footer. This notice renders in bright color, while the rest of Claude Code's terminal UI is deliberately uncolored/muted for anything that isn't actually important. The visual weight makes it read as urgent/important when it isn't — it's just informational and non-blocking — and it pulls focus every time it appears.

What I want: keep the auto-updater itself running exactly as it does today (I like automatic updates) — just don't render this specific notice with the same visual prominence as genuinely important/actionable UI state. Either:

• mute/de-emphasize the notice's styling to match the rest of the non-critical UI, or
• add a config option (e.g. in settings.json) to suppress just this notice while leaving the background updater itself untouched (distinct from DISABLE_AUTOUPDATER, which stops the updater entirely — not what's wanted here)

Today the only related settings are autoUpdatesChannel, minimumVersion, DISABLE_AUTOUPDATER, and DISABLE_UPDATES — none of which separate "update silently" from "don't show me a loud notice about it."