Fix cap deletion

Caps/ContentView.swift

@@ -295,7 +295,7 @@ struct ContentView: View {
         .alert(Text("Delete cap"),
                isPresented: $showDeleteCapAlert,
                actions: {
-            Button("Delete", role: .destructive, action: saveNewCapName)
+            Button("Delete", role: .destructive, action: startDeleteCap)
             Button("Cancel", role: .cancel, action: {})
         }, message: {
             Text("Confirm the deletion of cap \(selectedCapId ?? 0)")
@@ -420,12 +420,16 @@ struct ContentView: View {
 
     private func startDeleteCap() {
         guard let cap = selectedCapId else {
+            print("No cap to delete")
             return
         }
         Task {
+            print("Deleting cap \(cap)")
             guard await database.delete(cap: cap) else {
+                print("Failed to delete cap \(cap)")
                 return
             }
+            print("Deleted cap \(cap)")
         }
     }
 }

Caps/Data/Database.swift

@@ -800,7 +800,9 @@ final class Database: ObservableObject {
             // Delete cached images
             images.removeCachedImages(for: cap)
             // Delete cap
-            caps[cap] = nil
+            DispatchQueue.main.async {
+                self.caps[cap] = nil
+            }
             log("Deleted cap \(cap)")
             return true
         } catch {