## 1. Restructure backend tests

- [x] 1.1 Create `apps/api/tests/unit/` directory and move pure logic tests
- [x] 1.2 Create `apps/api/tests/integration/` directory and move API tests
- [x] 1.3 Create `apps/api/tests/system/` directory for full stack tests
- [x] 1.4 Update `pytest.ini` or `pyproject.toml` with test markers

## 2. Create shared fixtures

- [x] 2.1 Create `apps/api/tests/conftest.py` with shared fixtures
- [x] 2.2 Implement SQLite in-memory engine fixture for unit tests
- [x] 2.3 Implement PostgreSQL session fixture with transaction rollback
- [x] 2.4 Implement authenticated TestClient fixture
- [x] 2.5 Remove duplicate fixture code from existing test files

## 3. Add SQLite support for unit tests

- [x] 3.1 Add `aiosqlite` dependency to `pyproject.toml`
- [x] 3.2 Update SQLAlchemy configuration to support SQLite
- [x] 3.3 Verify unit tests run without PostgreSQL

## 4. Update dependencies and configuration

- [x] 4.1 Add missing test dependencies (`python-jose[cryptography]`)
- [x] 4.2 Configure `pytest-asyncio` with `asyncio_mode=auto`
- [x] 4.3 Add `addopts = -m "not system"` to default test run

## 5. Create E2E test setup

- [x] 5.1 Initialize Playwright in `e2e/` directory
- [x] 5.2 Add Playwright configuration (`playwright.config.ts`)
- [x] 5.3 Create first E2E test (login flow)
- [x] 5.4 Add `make test-e2e` target to Makefile

## 6. Update Makefile

- [x] 6.1 Add `test-unit` target
- [x] 6.2 Add `test-integration` target
- [x] 6.3 Add `test-system` target
- [x] 6.4 Update `test` target to run all categories

## 7. Migrate existing tests as examples

- [x] 7.1 Migrate `test_config.py` to `tests/unit/`
- [x] 7.2 Migrate `test_auth_api.py` to `tests/integration/`
- [x] 7.3 Verify migrated tests still pass

## 8. Documentation

- [x] 8.1 Update README with testing strategy
- [x] 8.2 Document how to run specific test categories
- [x] 8.3 Document fixture usage patterns
