## Implementation Summary Created E2E test for updating issue priority to none via detail modal PropertyDropdown. ### Files Changed 1. **tests/e2e/test_update_issue_priority_to_none.py** (new) - 4 test cases covering priority clearing via detail modal 2. **client/schema.py:61-62** - Changed priority column from NOT NULL to nullable - Updated CHECK constraint to allow NULL 3. **client/store.py:532,579** - Changed priority param to use _UNSET sentinel 4. **server/routes/web.py:1014-1015** - Added conversion from 'none' string to Python None ### Bug Fix Fixed existing test_inline_editing.py::test_set_priority_to_none - was failing due to NOT NULL constraint. All tests pass.