test: add comprehensive e2e test suite (34 spec files)
New tests/e2e/ suite covering:
- Auth, navigation, player, tracks, playlists
- Search, discover, social, marketplace, chat
- Accessibility, API, workflows, edge cases
- Routes coverage, forms validation, modals
- Empty states, responsive, network errors
- Error boundary, performance, visual regression
- Cross-browser, profile, smoke, upload
- Storybook, deep pages, visual bugs
- Includes fixtures, helpers, global setup/teardown
- Playwright config and coverage map
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
20a16f7cbe