Show overlays only after activation completes

The local probe confirmed activation is asynchronous on macOS 26:
isActive flips on a later runloop tick, so overlays shown in the same
tick as activate() belong to a still-inactive app and misses clicks.
Delay overlay creation by a tick and log the activation state at show
time.

💘 Generated with Crush

Assisted-by: Crush:deepseek-v4-flash-0731

Sources/Kapture/CaptureController.swift

@@ -61,21 +61,26 @@ final class CaptureController: NSObject {
         }
         isSelecting = true
         previousApp = NSWorkspace.shared.frontmostApplication
-        // Force activation and log whether it stuck — inactive apps don't
-        // receive overlay clicks.
-        let activated = NSApp.activate(ignoringOtherApps: true)
-        CaptureController.log("begin: activate(ignoringOtherApps)=\(activated) active=\(NSApp.isActive)")
-        overlays = NSScreen.screens.map { screen in
-            OverlayWindow(
-                screen: screen,
-                onComplete: { [weak self] rect in self?.finishSelection(rect) },
-                onCancel: { [weak self] in self?.cancelSelection() },
-                onWindowPick: { [weak self] rect in self?.finishWindowPick(rect) }
-            )
+        // Activation is ASYNC: isActive only flips on a later runloop tick
+        // (verified on macOS 26). Show overlays only once active, otherwise
+        // the first click can pass through to the windows below.
+        NSApp.activate(ignoringOtherApps: true)
+        CaptureController.log("begin: activate issued, active=\(NSApp.isActive)")
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) { [weak self] in
+            guard let self, self.isSelecting else { return }
+            CaptureController.log("begin: active=\(NSApp.isActive) — showing overlays")
+            self.overlays = NSScreen.screens.map { screen in
+                OverlayWindow(
+                    screen: screen,
+                    onComplete: { [weak self] rect in self?.finishSelection(rect) },
+                    onCancel: { [weak self] in self?.cancelSelection() },
+                    onWindowPick: { [weak self] rect in self?.finishWindowPick(rect) }
+                )
+            }
+            self.overlays.forEach { $0.makeKeyAndOrderFront(nil) }
+            self.overlayIDs = self.overlays.map { $0.windowNumber }
+            CaptureController.log("begin: \(self.overlays.count) overlays, ids=\(self.overlayIDs), active=\(NSApp.isActive)")
         }
-        overlays.forEach { $0.makeKeyAndOrderFront(nil) }
-        overlayIDs = overlays.map { $0.windowNumber }
-        CaptureController.log("begin: \(overlays.count) overlays, ids=\(overlayIDs), active=\(NSApp.isActive)")
     }
 
     /// A window was picked from hover — capture it with rounded corners.