[QA PASSED] All 7 E2E tests pass successfully. Comprehensive coverage verified for save button visibility behavior: button hidden on initial open, visible after changes, hidden after save, hidden when reverted. Test quality excellent. No regressions. Ready for deployment. See /tmp/qa-TRCKR-584.md

Implemented E2E test for save button visibility in issue detail modal. **Test file:** tests/e2e/test_update_issue_save_btn_visible_only_when_changed.py **Test coverage (7 tests):** - test_save_button_hidden_on_initial_open: Verify save button is NOT visible when opening detail modal (no changes yet) - test_save_button_visible_after_status_change: Verify save button appears after changing status via PropertyDropdown - test_save_button_visible_after_priority_change: Verify save button appears after changing priority via PropertyDropdown - test_save_button_visible_after_title_change: Verify save button appears after editing title inline - test_save_button_hidden_after_saving: Verify save button disappears after clicking Save (successful save) - test_save_button_hidden_when_change_reverted: Verify save button hides when user reverts change to original value - test_save_button_visible_after_description_change: Verify save button appears after editing description All 7 tests pass. The tests use the Docker-based test container for isolation.