Playwright Configuration Guardrails

Load environment configs via a central map (envConfigMap) and fail fast when TEST_ENV is missing or unsupported.
Standardize timeouts: action 15s, navigation 30s, expect 10s, test 60s; expose overrides through fixtures rather than inline literals.
Emit HTML + JUnit reporters, disable auto-open, and store artifacts under test-results/ for CI upload.
Keep .env.example, .nvmrc, and browser dependencies versioned so local and CI runs stay aligned.
Use global setup for shared auth tokens or seeding, but prefer per-test fixtures for anything mutable to avoid cross-test leakage.

Source: Playwright book repo, SEON configuration example.