Open task views in a sheet over the left pane

mac/Sources/Byre/BoxDiagram.swift

@@ -855,7 +855,8 @@ struct BoxCanvas: View {
 
 struct BoxDiagramView: View {
     let source: String
-    @Environment(Overlays.self) private var overlays
+    @Environment(Store.self) private var store
+    @Environment(\.inTask) private var inTask
 
     var body: some View {
         switch cachedBoxLayout(source) {
@@ -865,7 +866,7 @@ struct BoxDiagramView: View {
             }
             .contentShape(Rectangle())
             .onTapGesture {
-                overlays.diagram = layout
+                store.openSheet(.diagram(layout), fromTask: inTask)
             }
             .help("Open full size")
             .frame(maxWidth: .infinity, alignment: .leading)
@@ -908,10 +909,6 @@ struct DiagramViewer: View {
                 picked = id == picked ? nil : id
             }
         }
-        .padding(12)
-        .background(Palette.raised, in: RoundedRectangle(cornerRadius: 10))
-        .overlay(RoundedRectangle(cornerRadius: 10).stroke(Palette.border))
-        .shadow(color: Palette.overlayShadow, radius: 14, y: 8)
     }
 }