Add team tasks: several agents in one worktree sharing a board

mac/Sources/Byre/Panes.swift

@@ -23,6 +23,7 @@ struct TabBadgeView: View {
 
 let tabLabels: [TaskTab: String] = [
     .transcript: "Transcript",
+    .board: "Board",
     .changes: "Changes",
     .files: "Files",
     .terminal: "Terminal",
@@ -221,7 +222,9 @@ private struct TaskPane: View {
         switch store.focus.tab {
         case .transcript:
             ChatView(kind: .task(store.selectedTaskId))
-                .id(store.selectedTaskId ?? "")
+                .id("\(store.selectedTaskId ?? "")/\(store.selectedTaskId.flatMap { store.pickedMember($0) } ?? "")")
+        case .board:
+            BoardView()
         case .changes:
             ChangesView()
         case .files:
@@ -388,11 +391,13 @@ private struct TabStrip: View {
         let findings = latest.map(findingCount) ?? 0
         let hasReviews = transcript.contains(where: isReviewEvent)
         let workflow = store.selectedTaskId.flatMap { store.findTask($0) }?.workflowRun != nil
+        let team = store.selectedTaskId.map { !store.team($0).isEmpty } ?? false
         let order = (first + taskTabs.filter { !first.contains($0) }).filter { t in
             if t == tab {
                 return true
             }
             switch t {
+            case .board: return team
             case .inbox: return waiting > 0
             case .reviews: return hasReviews
             case .workflow: return workflow