Apply same fix as #1091 to isMCPServerInstalled(): check all three
settings locations (user-level, project-level, and project-local).
- Extract checkMCPInSettings() helper function
- Check ~/.claude/settings.json, .claude/settings.json, and
.claude/settings.local.json
- Add TestIsMCPServerInstalledProjectLevel with positive and negative cases
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>