Blur enrolled and teaching class cards for non-premium users

Match schedule/to-do behavior: visual effect overlay, gated hover, tap opens paywall.

Made-with: Cursor

classroom_app/ViewController.swift

@@ -6718,6 +6718,34 @@ private extension ViewController {
         openURLWithRouting(url, policy: inAppBrowserDefaultPolicy)
     }
 
+    private func addPremiumLockOverlayToClassCard(_ card: NSView, message: String) {
+        let lockOverlay = NSVisualEffectView()
+        lockOverlay.translatesAutoresizingMaskIntoConstraints = false
+        lockOverlay.material = darkModeEnabled ? .hudWindow : .popover
+        lockOverlay.blendingMode = .withinWindow
+        lockOverlay.state = .active
+        lockOverlay.wantsLayer = true
+        lockOverlay.layer?.cornerRadius = 14
+        lockOverlay.layer?.masksToBounds = true
+        lockOverlay.layer?.backgroundColor = NSColor.black.withAlphaComponent(darkModeEnabled ? 0.28 : 0.12).cgColor
+
+        let lockLabel = textLabel(message, font: NSFont.systemFont(ofSize: 12, weight: .semibold), color: darkModeEnabled ? .white : .black)
+        lockLabel.alignment = .center
+
+        card.addSubview(lockOverlay)
+        lockOverlay.addSubview(lockLabel)
+        NSLayoutConstraint.activate([
+            lockOverlay.leadingAnchor.constraint(equalTo: card.leadingAnchor),
+            lockOverlay.trailingAnchor.constraint(equalTo: card.trailingAnchor),
+            lockOverlay.topAnchor.constraint(equalTo: card.topAnchor),
+            lockOverlay.bottomAnchor.constraint(equalTo: card.bottomAnchor),
+            lockLabel.centerXAnchor.constraint(equalTo: lockOverlay.centerXAnchor),
+            lockLabel.centerYAnchor.constraint(equalTo: lockOverlay.centerYAnchor),
+            lockLabel.leadingAnchor.constraint(greaterThanOrEqualTo: lockOverlay.leadingAnchor, constant: 10),
+            lockLabel.trailingAnchor.constraint(lessThanOrEqualTo: lockOverlay.trailingAnchor, constant: -10)
+        ])
+    }
+
     private func renderEnrolledClassCards(_ courses: [ClassroomCourse]) {
         guard let stack = enrolledPageCardsStack else { return }
         enrolledCourseByCardID.removeAll()
@@ -6823,19 +6851,37 @@ private extension ViewController {
             let base = self.palette.sectionCard
             let hoverBlend = self.darkModeEnabled ? NSColor.white : NSColor.black
             let hover = base.blended(withFraction: 0.10, of: hoverBlend) ?? base
-            card.layer?.backgroundColor = (hovering ? hover : base).cgColor
+            if self.storeKitCoordinator.hasPremiumAccess {
+                card.layer?.backgroundColor = (hovering ? hover : base).cgColor
+            } else {
+                card.layer?.backgroundColor = base.cgColor
+            }
         }
         hit.onHoverChanged?(false)
+
+        if !storeKitCoordinator.hasPremiumAccess {
+            addPremiumLockOverlayToClassCard(card, message: "Get Premium to see classes")
+            hit.toolTip = "Premium required. Click to open paywall."
+        }
+
         return hit
     }
 
     @objc private func enrolledCardButtonPressed(_ sender: NSButton) {
+        guard storeKitCoordinator.hasPremiumAccess else {
+            showPaywall()
+            return
+        }
         guard let courseID = sender.identifier?.rawValue,
               let course = enrolledCourseByCardID[courseID] else { return }
         enrolledClassCardClicked(view: sender, course: course)
     }
 
     @objc private func teachingCardButtonPressed(_ sender: NSButton) {
+        guard storeKitCoordinator.hasPremiumAccess else {
+            showPaywall()
+            return
+        }
         guard let courseID = sender.identifier?.rawValue,
               let course = teachingCourseByCardID[courseID] else { return }
         enrolledClassCardClicked(view: sender, course: course)
@@ -6913,9 +6959,19 @@ private extension ViewController {
             let base = self.palette.sectionCard
             let hoverBlend = self.darkModeEnabled ? NSColor.white : NSColor.black
             let hover = base.blended(withFraction: 0.10, of: hoverBlend) ?? base
-            card.layer?.backgroundColor = (hovering ? hover : base).cgColor
+            if self.storeKitCoordinator.hasPremiumAccess {
+                card.layer?.backgroundColor = (hovering ? hover : base).cgColor
+            } else {
+                card.layer?.backgroundColor = base.cgColor
+            }
         }
         hit.onHoverChanged?(false)
+
+        if !storeKitCoordinator.hasPremiumAccess {
+            addPremiumLockOverlayToClassCard(card, message: "Get Premium to see classes")
+            hit.toolTip = "Premium required. Click to open paywall."
+        }
+
         return hit
     }