Give each workflow run a parent task with no agent

mac/Sources/Byre/Store.swift

@@ -391,6 +391,14 @@ final class Store {
         projects.first { $0.id == focus.projectId }
     }
 
+    var shownTab: TaskTab {
+        let run = selectedTaskId.flatMap { findTask($0) }?.workflow != nil
+        if run {
+            return focus.tab == .project ? .project : .workflow
+        }
+        return focus.tab == .workflow ? .transcript : focus.tab
+    }
+
     func setFocus(taskId: String?? = .none, projectId: String?? = .none, tab: TaskTab? = nil) async throws {
         let task = taskId ?? focus.taskId
         let project = task != nil ? findTask(task!)?.projectId : (projectId ?? focus.projectId)
@@ -527,7 +535,7 @@ final class Store {
     }
 
     func unreadSummary(_ task: ByreTask) -> Bool {
-        task.workflow == nil && task.summarySeq > (summaryReads[task.id] ?? 0)
+        task.workflowStage == nil && task.summarySeq > (summaryReads[task.id] ?? 0)
     }
 
     var unreadSummaries: Int {