Add OAuth 2.1 Bearer token authentication e2e tests for MCP HTTP servers

[Copilot]

Adds comprehensive end-to-end test coverage for OAuth 2.1 Bearer token authentication flow between Atlas UI backend and MCP HTTP servers using FastMCP's auth providers.

Test Implementation

Python test suite (test/oauth_e2e_test.py, 440 lines):

• Backend/MCP server integration validation
• Environment variable token resolution (${MCP_MOCK_TOKEN_1} → actual token)
• Authentication requirement enforcement (401/403 for invalid/missing tokens)
• Full stack OAuth 2.1 flow simulation
• Token values redacted in logs, API responses sanitized

Playwright test suite (test_e2e/tests/oauth-authentication.spec.js, 233 lines):

• Browser-based OAuth workflow validation
• Helper functions (openToolsPanel, navigateToMarketplace) reduce duplication
• Uses waitForLoadState('networkidle') for reliability vs hardcoded timeouts
• Screenshots organized in screenshots/oauth/

Test runner integration (test/e2e_tests.sh):

• OAuth tests added to standard e2e suite
• Pattern matches existing simple_e2e_test.py

Example: Testing Token Resolution

# Backend resolves ${ENV_VAR} in mcp.json auth_token
def test_environment_variable_resolution():
    token1 = os.environ.get("MCP_MOCK_TOKEN_1")
    if token1:
        print_success("MCP_MOCK_TOKEN_1 is set: [REDACTED]")
    # Verify backend loaded config with resolved token
    response = requests.get(f"{BASE_URL}/api/config")
    assert response.status_code == 200

Documentation

• test/OAUTH_E2E_TESTS.md: Architecture, configuration, troubleshooting (192 lines)
• test/OAUTH_TESTING_QUICKSTART.md: Step-by-step guide with curl examples (256 lines)
• Updated CHANGELOG.md and test/README.md

Integration

Tests integrate with existing mocks/mcp-http-mock/ server:

• Uses FastMCP's StaticTokenVerifier (development only)
• Test tokens: MCP_MOCK_TOKEN_1, MCP_MOCK_TOKEN_2
• Gracefully skips server-specific tests if mock not running

Complements existing backend/tests/integration/test_mcp_auth_integration.py with full-stack validation.

Running Tests

bash test/run_tests.sh e2e              # All e2e tests
python3 test/oauth_e2e_test.py         # Python only
cd test_e2e && npm test -- oauth-*.js  # Playwright only

Original prompt

look at the changes on this pr/branch for the oauth2.1. look at the bash test/run_tests.sh e2e and follow the same patter for e2e tests. add some e2e tests to evalute the oauth2.1 workflow functions with integration on the backend and frontend

The user has attached the following file paths as relevant context:

• .github/copilot-instructions.md

Created from VS Code.

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