Make the project TODO list easier to scan

mac/Sources/Byre/Project.swift

@@ -509,6 +509,7 @@ private struct TodoBlock: View {
     let todo: Result<Todo, ApiError>?
     let active: [ByreTask]
     let filter: String
+    @ViewState private var open: Set<String> = []
 
     var body: some View {
         switch todo {
@@ -534,8 +535,14 @@ private struct TodoBlock: View {
                                 .padding(.top, i == 0 ? 10 : 2)
                                 .padding(.bottom, 4)
                         }
-                        TodoRow(project: project, item: item, task: active.first { $0.todoItem == item.title })
+                        TodoRow(project: project, item: item, task: active.first { $0.todoItem == item.title }, open: open.contains(item.title) || (!filter.isEmpty && matches(item.body, filter))) {
-                            .padding(.bottom, i == items.count - 1 || items[i + 1].section != item.section ? 8 : 0)
+                            if open.contains(item.title) {
+                                open.remove(item.title)
+                            } else {
+                                open.insert(item.title)
+                            }
+                        }
+                        .padding(.bottom, i == items.count - 1 || items[i + 1].section != item.section ? 8 : 0)
                     }
                 }
             }
@@ -554,18 +561,31 @@ private struct TodoRow: View {
     let project: Project
     let item: TodoItem
     let task: ByreTask?
+    let open: Bool
+    let toggle: () -> Void
     @Environment(Store.self) private var store
     @Environment(Overlays.self) private var overlays
     @Environment(\.filterQuery) private var query
 
     var body: some View {
         VStack(alignment: .leading, spacing: 4) {
-            HStack(spacing: 10) {
+            HStack(spacing: 8) {
+                Button(action: toggle) {
+                    Image(systemName: open ? "chevron.down" : "chevron.right")
+                        .font(Fonts.font(9, weight: 600))
+                        .foregroundStyle(Palette.muted)
+                        .frame(width: 12)
+                        .contentShape(Rectangle())
+                }
+                .buttonStyle(.plain)
+                .opacity(item.body.isEmpty ? 0 : 1)
+                .disabled(item.body.isEmpty)
                 title
                 action
             }
-            if !item.body.isEmpty {
+            if open && !item.body.isEmpty {
                 MarkdownView(blocks: parseMarkdown(item.body), ctx: MDContext(color: Palette.muted))
+                    .padding(.leading, 20)
             }
         }
         .padding(.horizontal, 10)
@@ -587,6 +607,11 @@ private struct TodoRow: View {
             }
             .buttonStyle(.plain)
             .help("Open \(task.name)")
+        } else if !item.body.isEmpty {
+            Button(action: toggle) {
+                text.contentShape(Rectangle())
+            }
+            .buttonStyle(.plain)
         } else {
             text
         }