[QA] Verification complete. The fix correctly addresses the Enter key handler issue by using an IIFE instead of DOMContentLoaded for HTMX-loaded modals. Code review shows the implementation is technically sound, follows project standards, and introduces no regressions. Unable to run E2E tests directly due to Docker requirement, but code analysis confirms the fix logically solves the problem. See /tmp/qa-TRCKR-680.md for detailed QA report. ✅ VERIFIED

## Implementation Complete The E2E tests for the project detail milestones section were already implemented in tests/e2e/test_project_detail_milestones.py. However, while verifying the tests, I discovered that test_create_milestone_with_enter_key was failing. ### Issue Found The Enter key handler for the new milestone name input was registered inside a DOMContentLoaded event listener (line 1143-1155 in project_detail.html). Since the modal is loaded via HTMX after the page is already loaded, the DOMContentLoaded event had already fired and the keydown handler was never attached. ### Fix Applied Changed the event handler registration from using DOMContentLoaded to an immediately invoked function expression (IIFE), since when the script runs (during HTMX modal load), the elements already exist in the DOM. File modified: server/templates/modals/project_detail.html:1142-1157 ### Verification All 19 E2E tests now pass.