Add setting to disable Chrome tab group creation

Feature Request

Every time a new Claude Code session starts with Chrome integration enabled, the extension creates a new tab group in Chrome. These tab groups accumulate across sessions and clutter the browser, especially for users who run many sessions throughout the day.

Current Behavior

• Each new Claude Code session creates a "Claude Code" tab group in Chrome
• Old tab groups persist after sessions end
• No way to disable this behavior short of --no-chrome (which disables all browser integration)

Requested Behavior

A setting to disable automatic tab group creation, e.g.:

// ~/.claude/settings.json or .claude/settings.local.json
{
  "chromeTabGroups": false
}

Or a CLI flag like --no-chrome-tab-groups.

The Chrome integration tools (read page, navigate, etc.) should still work — just without auto-creating and organizing tabs into groups.

Workaround

Currently the only workarounds are:

• Manually right-clicking each tab group → "Close group" or "Ungroup"
• Disabling Chrome integration entirely with --no-chrome