v2.1.0-alpha.461

Changes

feat: wire up i18n for HealthDashboard (97de0ead)
feat: wire up i18n for BridgeDetailsPage (5292abf8)
feat: wire up i18n for StatusIndicator, ErrorBoundary, and DashboardPage (09e2982e)
feat: add frontend unit test infrastructure and initial tests (0fe6ac18)
feat: graceful shutdown on SIGTERM/SIGINT (b39b9b6f)

⚠️ This is an alpha release - use at your own risk!