fix: paint window-aligned gradients within popup bounds

Sources/Conjure/ApplicationActionsController.swift

@@ -118,6 +118,10 @@ final class ApplicationActionsController: NSViewController, NSSearchFieldDelegat
             content.trailingAnchor.constraint(equalTo: view.trailingAnchor),
             content.topAnchor.constraint(equalTo: view.topAnchor),
             content.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+            background.leadingAnchor.constraint(equalTo: content.leadingAnchor),
+            background.trailingAnchor.constraint(equalTo: content.trailingAnchor),
+            background.topAnchor.constraint(equalTo: content.topAnchor),
+            background.bottomAnchor.constraint(equalTo: content.bottomAnchor),
             applicationLabel.leadingAnchor.constraint(equalTo: content.leadingAnchor, constant: 16),
             applicationLabel.trailingAnchor.constraint(equalTo: content.trailingAnchor, constant: -16),
             applicationLabel.topAnchor.constraint(equalTo: content.topAnchor, constant: 14),
@@ -197,13 +201,8 @@ final class ApplicationActionsController: NSViewController, NSSearchFieldDelegat
             view.alphaValue = 0
             view.translatesAutoresizingMaskIntoConstraints = false
             host.addSubview(view)
-            // Crop the window-sized background; filtering must not rescale its glows.
-            NSLayoutConstraint.activate([
-                background.leadingAnchor.constraint(equalTo: host.leadingAnchor),
-                background.trailingAnchor.constraint(equalTo: host.trailingAnchor),
-                background.topAnchor.constraint(equalTo: host.topAnchor),
-                background.bottomAnchor.constraint(equalTo: host.bottomAnchor)
-            ])
+            // Paint only the popup's bounds, using the window's gradient coordinates.
+            background.canvas = host
             NSLayoutConstraint.activate([
                 view.trailingAnchor.constraint(equalTo: pill.trailingAnchor),
                 belowAnchor
@@ -214,7 +213,6 @@ final class ApplicationActionsController: NSViewController, NSSearchFieldDelegat
             coveredPillAlpha = pill.alphaValue
         }
         coveredPill?.setAccessibilityHidden(true)
-        // Resolve the background crop before fading in a newly positioned popup.
         host.layoutSubtreeIfNeeded()
         background.needsDisplay = true
         NSAnimationContext.runAnimationGroup { context in