fix(datagrid): restore three-state sort cycle (asc, desc, none)

Author: datlechin

TablePro/Views/Results/Extensions/DataGridView+Sort.swift

@@ -19,6 +19,14 @@ extension TableViewCoordinator {
             return
         }
 
+        if let oldDescriptor = oldDescriptors.first,
+           oldDescriptor.key == newDescriptor.key,
+           oldDescriptor.ascending == false,
+           newDescriptor.ascending == true {
+            delegate?.dataGridClearSort()
+            return
+        }
+
         delegate?.dataGridSort(column: columnIndex, ascending: newDescriptor.ascending, isMultiSort: false)
     }
 

TableProTests/Models/SortStateTests.swift

@@ -211,14 +211,4 @@ struct SortStateTests {
         #expect(state.isSorting == false)
         #expect(state.columnIndex == nil)
     }
-
-    @Test("Descending toggled to ascending stays sorting and does not clear")
-    func descendingToAscendingStaysSorted() {
-        var state = SortState()
-        state.columns = [SortColumn(columnIndex: 0, direction: .descending)]
-        state.columns[0].direction = .ascending
-        #expect(state.isSorting == true)
-        #expect(state.columns.count == 1)
-        #expect(state.columns[0].direction == .ascending)
-    }
 }