Replace static window variables (ACKIFY_OAUTH_ENABLED, ACKIFY_MAGICLINK_ENABLED)
with dynamic API call to /api/v1/auth/config. This allows auth methods to be
changed without rebuilding the frontend and supports dynamic tenant configuration.
Reorganize GitHub Actions workflows into reusable components and implement
complete code coverage tracking across backend, frontend, and E2E tests.
**CI/CD Improvements:**
- Split monolithic ci.yml into 6 specialized reusable workflows
- New workflows: test-backend, test-frontend, test-e2e, build-docker, security, coverage-report
- Orchestrated execution with proper dependencies and parallel jobs
- Codecov integration with multi-flag coverage (backend/frontend/e2e)
**Frontend Testing:**
- Add Vitest for unit testing with coverage-v8 provider
- Create test setup with window mocks for Ackify globals
- Add 34 unit tests for titleExtractor, referenceDetector, and http utils
- Configure Istanbul instrumentation for E2E coverage collection
- Integrate @cypress/code-coverage for E2E test coverage
**Test Infrastructure:**
- Create run-tests-suite.sh for local comprehensive test execution
- Proper Docker Compose orchestration for integration and E2E tests
- Automatic cleanup handlers with trap for test environments
- Coverage summary aggregation across all test types
**Bug Fixes:**
- Fix backend config tests after OAuth/MagicLink validation changes
- Update tests from panic expectations to error checking
- Ensure OAUTH_COOKIE_SECRET is properly configured in tests
**Configuration:**
- Add .codecov.yml for coverage reporting with flags
- Add .nycrc.json for E2E LCOV generation
- Update .gitignore for test artifacts and coverage reports
- Configure Vite for test environment and code instrumentation
