Replace astral-sh/setup-uv action with direct curl install to avoid
Node.js 18 incompatibility (setup-uv v6+ requires Node 20+). Change
e2e test API host port from 8000 to 8100 to avoid conflict with
existing service on the CI runner.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Set up end-to-end test infrastructure with Docker Compose test
environment, Playwright config, and automated global setup/teardown
that seeds a test database and creates fixtures via the API.
Tests cover 11 pages across both dark/light themes for WCAG 2.0 AA
accessibility (axe-core), and across 3 viewports (mobile, tablet,
desktop) for horizontal overflow and touch target validation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
