**RESOLVED AS DUPLICATE** This issue is a duplicate of TRCKR-626. The requested E2E tests for deleting project milestones inline were already implemented and merged to master. **Evidence:** - Test file `tests/e2e/test_update_project_delete_milestone_inline.py` exists on master - Added by commit 6b8ee48 with message "TRCKR-626: Add E2E test for deleting project milestone inline" - Contains 9 comprehensive test cases covering all delete scenarios **Resolution:** Marked as done since the work is complete. No code changes required - the TRCKR-518 branch has no diff against master because the work was completed under TRCKR-626.

[QA] FAILED - No implementation work performed **VERDICT:** QA FAILED - TRCKR-518 contains no code changes and is a duplicate of TRCKR-626. **Evidence:** 1. **No commits on TRCKR-518 branch** - `git diff master` shows zero changes 2. **Tests already exist on master** - File `tests/e2e/test_update_project_delete_milestone_inline.py` was added by commit 6b8ee48 (TRCKR-626) on 2025-12-22 3. **All 9 test cases present:** - test_delete_milestone_removes_row_from_ui - test_delete_milestone_persists_to_database - test_delete_milestone_cancel_preserves_milestone - test_delete_milestone_updates_count - test_delete_one_of_multiple_milestones - test_delete_specific_milestone_by_id - test_delete_milestone_shows_no_milestones_message - test_delete_milestone_with_linked_issues - test_delete_milestone_remove_button_disabled_during_save **Recommendation:** Close TRCKR-518 as duplicate of TRCKR-626 or mark as invalid. The requested work is complete and merged. **Full QA report:** /tmp/qa-TRCKR-518.md

Investigation found that E2E tests for deleting project milestones inline already exist. **Test File:** tests/e2e/test_update_project_delete_milestone_inline.py **9 Tests Covering:** 1. test_delete_milestone_removes_row_from_ui - Verifies UI row removal after deletion 2. test_delete_milestone_persists_to_database - Verifies database persistence 3. test_delete_milestone_cancel_preserves_milestone - Cancel confirmation preserves data 4. test_delete_milestone_updates_count - Count badge updates correctly 5. test_delete_one_of_multiple_milestones - Multiple milestones scenario 6. test_delete_specific_milestone_by_id - Target specific milestone by ID 7. test_delete_milestone_shows_no_milestones_message - Empty state message 8. test_delete_milestone_with_linked_issues - Linked issues handling 9. test_delete_milestone_remove_button_disabled_during_save - Loading state **Test Results:** All 9 tests pass against local server. **Note:** These tests were added by commit 6b8ee48 (TRCKR-626) and are already merged to master. This issue appears to be a duplicate or the work was completed under a different ticket.