fix: preview tab double-click detection and promotion

TablePro/Core/Services/Infrastructure/MainSplitViewController.swift

@@ -332,11 +332,11 @@ internal final class MainSplitViewController: NSSplitViewController, InspectorVi
                             previewCoordinator.promotePreviewTab()
                         } else {
                             previewCoordinator.promotePreviewTab()
-                            coordinator.openTableTab(table.name, isView: isView)
+                            coordinator.openTableTab(table.name, isView: isView, asPreview: false)
                         }
                     } else {
                         coordinator.promotePreviewTab()
-                        coordinator.openTableTab(table.name, isView: isView)
+                        coordinator.openTableTab(table.name, isView: isView, asPreview: false)
                     }
                 },
                 pendingTruncates: sessionPendingTruncatesBinding,

TablePro/Views/Main/Extensions/MainContentCoordinator+Navigation.swift

@@ -15,7 +15,7 @@ private let navigationLogger = Logger(subsystem: "com.TablePro", category: "Main
 extension MainContentCoordinator {
     // MARK: - Table Tab Opening
 
-    func openTableTab(_ tableName: String, showStructure: Bool = false, isView: Bool = false) {
+    func openTableTab(_ tableName: String, showStructure: Bool = false, isView: Bool = false, asPreview: Bool? = nil) {
         let navigationModel = PluginMetadataRegistry.shared.snapshot(
             forTypeId: connection.type.pluginTypeId
         )?.navigationModel ?? .standard
@@ -73,8 +73,9 @@ extension MainContentCoordinator {
 
         // If no tabs exist (empty state), add a table tab directly.
         // In preview mode, mark it as preview so subsequent clicks replace it.
+        let usePreview = asPreview ?? AppSettingsManager.shared.tabs.enablePreviewTabs
         if tabManager.tabs.isEmpty {
-            if AppSettingsManager.shared.tabs.enablePreviewTabs {
+            if usePreview {
                 tabManager.addPreviewTableTab(
                     tableName: tableName,
                     databaseType: connection.type,
@@ -155,7 +156,7 @@ extension MainContentCoordinator {
         }
 
         // Preview tab mode: reuse or create a preview tab instead of a new native window
-        if AppSettingsManager.shared.tabs.enablePreviewTabs {
+        if usePreview {
             openPreviewTab(tableName, isView: isView, databaseName: currentDatabase, schemaName: currentSchema, showStructure: showStructure)
             return
         }

TablePro/Views/Sidebar/DoubleClickDetector.swift

@@ -84,13 +84,22 @@ private final class SharedDoubleClickMonitor {
     private func handleMouseDown(_ event: NSEvent) {
         guard event.clickCount == 2 else { return }
 
-        for view in registeredViews.allObjects {
+        let views = registeredViews.allObjects
+        guard !views.isEmpty else { return }
+
+        for view in views {
             guard let viewWindow = view.window,
                   event.window === viewWindow else { continue }
-            let locationInView = view.convert(event.locationInWindow, from: nil)
-            if view.bounds.contains(locationInView) {
+
+            var ancestor: NSView? = view.superview
+            while let current = ancestor, !(current is NSTableRowView) {
+                ancestor = current.superview
+            }
+            let hitView = ancestor ?? view
+            let locationInHitView = hitView.convert(event.locationInWindow, from: nil)
+            if hitView.bounds.contains(locationInHitView) {
                 view.onDoubleClick?()
-                break
+                return
             }
         }
     }