[QA] Verification complete - test already implemented under TRCKR-637. Found comprehensive test file with 5 test cases covering due date creation, past dates, future dates, optional dates, and table display. No code changes needed. See /tmp/qa-TRCKR-549.md for full report.

## Investigation Complete This E2E test was already implemented under TRCKR-637. ### Existing Test File - tests/e2e/test_create_milestone_with_due_date.py ### Test Coverage (5 tests, all passing) 1. test_create_milestone_with_due_date - Creates milestone with future due date, verifies via API 2. test_create_milestone_with_past_due_date - Verifies past dates are accepted 3. test_create_milestone_with_far_future_due_date - Verifies far future dates work 4. test_create_milestone_without_due_date_then_verify_none - Verifies due date is optional 5. test_due_date_displayed_in_table - Verifies due date appears in table display ### Verification All 5 tests passed in 8.13s using local server. ### Conclusion No additional work needed - this issue is a duplicate of TRCKR-637.