fix(tabs): keep the editor tabs reachable to accessibility over the pointer's owner

TablePro/Views/Main/EditorTabInteractionView.swift

@@ -31,6 +31,7 @@ internal final class EditorTabInteractionView: NSView {
     /// the content.
     internal var onRowCountChanged: ((Int) -> Void)?
 
+    private var isResolvingAccessibilityHit = false
     private var hoverTrackingArea: NSTrackingArea?
     private var lastActivatedTabId: UUID?
 
@@ -110,12 +111,27 @@ internal final class EditorTabInteractionView: NSView {
 
     /// Claims the track and nothing else, so a press on a tab is this view's and a press on the
     /// new-tab button, on the band's insets or on the chrome below the track is not.
+    ///
+    /// The claim is for the pointer alone. Accessibility resolves a screen point through this same
+    /// method, so claiming it unconditionally answered "the strip" for every tab and took all of
+    /// them out of reach of VoiceOver, Switch Control, Voice Control and XCUITest at once: this
+    /// view publishes nothing, so there was no element under a tab to speak, press or click. That
+    /// shipped in #2571 and turned the whole UI suite red from the commit that merged it.
     override internal func hitTest(_ point: NSPoint) -> NSView? {
+        guard !isResolvingAccessibilityHit else { return super.hitTest(point) }
         let local = convert(point, from: superview)
         guard trackRect.contains(local) else { return super.hitTest(point) }
         return self
     }
 
+    /// Answers from the SwiftUI tree, which is where the tabs publish themselves. The pointer's
+    /// claim is lifted for the length of the question.
+    override internal func accessibilityHitTest(_ point: NSPoint) -> Any? {
+        isResolvingAccessibilityHit = true
+        defer { isResolvingAccessibilityHit = false }
+        return super.accessibilityHitTest(point)
+    }
+
     private func tabIndex(atViewPoint point: CGPoint) -> Int? {
         EditorTabRunLayoutBuilder.index(at: contentPoint(fromViewPoint: point), in: interaction.run)
     }

TableProUITests/EditorTabDetachUITests.swift

@@ -80,7 +80,7 @@
         let target = try XCTUnwrap(tabLabels(in: window).last)
         tab(named: target, in: window).rightClick()
 
-        let item = app.menuItems["Move Tab to New Window"]
+        let item = app.menuItems.matching(identifier: "Move Tab to New Window").firstMatch
         XCTAssertTrue(item.waitToExist(timeout: 5), "The command must be listed")
         XCTAssertTrue(item.isEnabled, "It must be offered on an idle tab among others")
         app.typeKey(XCUIKeyboardKey.escape, modifierFlags: [])
@@ -90,9 +90,9 @@
 
     private func detach(tabNamed name: String, in window: XCUIElement, of app: XCUIApplication) {
         let target = tab(named: name, in: window)
         XCTAssertTrue(waitUntilHittable(target, timeout: 20), "The tab must be hittable")
         target.rightClick()
-        let item = app.menuItems["Move Tab to New Window"]
+        let item = app.menuItems.matching(identifier: "Move Tab to New Window").firstMatch
         XCTAssertTrue(item.waitToExist(timeout: 5), "The command must be listed")
         item.click()
     }