fix(datagrid): show dimmed chevron on deleted rows per HIG disabled-appearance

CHANGELOG.md

@@ -35,6 +35,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Result-grid cells on rows marked for deletion keep their dropdown / date / JSON / blob chevron visible at reduced opacity instead of hiding it, so the cell type is still legible while clearly inactive. Click on the dimmed chevron is a no-op; FK arrow navigation is unchanged. Matches the macOS HIG "disabled appearance" guideline.
 - Foreign key navigation from a table with unsaved edits opens the referenced table in a new window tab to preserve the edit buffer. Closing that new tab no longer wipes the original tab's data grid. Previously the new tab's teardown broadcast a connection-scoped event that other coordinators on the same connection received, causing them to release their cell data.
 - Tables sidebar refreshes automatically after a successful SQL import; the refresh notification now fires after the success sheet's dismissal animation, so the main window is key when the observer runs (#1114)
 - PostgreSQL connections honor the import dialog's "Disable foreign key checks" option via `SET session_replication_role = replica` (requires REPLICATION role or superuser; managed Postgres typically rejects it) (#1114)

TablePro/Views/Results/Cells/DataGridCellView.swift

@@ -36,6 +36,7 @@ final class DataGridCellView: NSView {
 
     private static let chevronNormal = makeAccessoryImage("chevron.up.chevron.down", pointSize: 10, color: .secondaryLabelColor)
     private static let chevronEmphasized = makeAccessoryImage("chevron.up.chevron.down", pointSize: 10, color: .alternateSelectedControlTextColor)
+    private static let chevronDisabled = makeAccessoryImage("chevron.up.chevron.down", pointSize: 10, color: .tertiaryLabelColor)
     private static let fkArrowNormal = makeAccessoryImage("arrow.right.circle.fill", pointSize: 14, color: .secondaryLabelColor)
     private static let fkArrowEmphasized = makeAccessoryImage("arrow.right.circle.fill", pointSize: 14, color: .alternateSelectedControlTextColor)
 
@@ -263,7 +264,7 @@ final class DataGridCellView: NSView {
             let y = (bounds.height - size.height) / 2
             return NSRect(x: x, y: y, width: size.width, height: size.height)
         case .dropdown, .boolean, .date, .json, .blob:
-            guard isEditableCell, !visualState.isDeleted else { return .zero }
+            guard isEditableCell else { return .zero }
             let size = NSSize(width: 12, height: 14)
             let x = bounds.maxX - DataGridMetrics.cellHorizontalInset - size.width
             let y = (bounds.height - size.height) / 2
@@ -280,7 +281,13 @@ final class DataGridCellView: NSView {
         case .foreignKey:
             image = onEmphasizedSelection ? Self.fkArrowEmphasized : Self.fkArrowNormal
         case .dropdown, .boolean, .date, .json, .blob:
-            image = onEmphasizedSelection ? Self.chevronEmphasized : Self.chevronNormal
+            if visualState.isDeleted {
+                image = Self.chevronDisabled
+            } else if onEmphasizedSelection {
+                image = Self.chevronEmphasized
+            } else {
+                image = Self.chevronNormal
+            }
         }
         image.draw(in: rect, from: .zero, operation: .sourceOver, fraction: 1.0, respectFlipped: true, hints: nil)
     }
@@ -300,6 +307,10 @@ final class DataGridCellView: NSView {
                 accessoryDelegate?.dataGridCellDidClickFKArrow(row: cellRow, columnIndex: cellColumnIndex)
                 return
             case .dropdown, .boolean, .date, .json, .blob:
+                guard !visualState.isDeleted else {
+                    super.mouseDown(with: event)
+                    return
+                }
                 accessoryDelegate?.dataGridCellDidClickChevron(row: cellRow, columnIndex: cellColumnIndex)
                 return
             case .text:

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

@@ -88,7 +88,7 @@ extension TableViewCoordinator {
         let cellState = DataGridCellState(
             visualState: state,
             isFocused: isFocused,
-            isEditable: isEditable && !state.isDeleted,
+            isEditable: isEditable,
             isLargeDataset: isLargeDataset,
             row: row,
             columnIndex: columnIndex