Give each workflow run a parent task with no agent

mac/Sources/Byre/Workflow.swift

@@ -66,6 +66,7 @@ private func stateColor(_ state: String) -> Color {
 struct WorkflowView: View {
     @Environment(Store.self) private var store
     @ViewState private var run: WorkflowRun?
+    @ViewState private var runId: String?
     @ViewState private var error = ""
     @ViewState private var target = 0
     @ViewState private var loading = false
@@ -74,8 +75,8 @@ struct WorkflowView: View {
     var body: some View {
         let task = store.selectedTaskId.flatMap { store.findTask($0) }
         VStack(spacing: 0) {
-            if let task, let runId = task.workflowRun {
-                if let run, run.run == runId {
+            if let task, task.workflow != nil {
+                if let run, runId == task.id {
                     HStack(alignment: .firstTextBaseline, spacing: 10) {
                         Text(run.name).font(Fonts.font(13, weight: 700))
                         Text(run.title).foregroundStyle(Palette.muted)
@@ -114,13 +115,14 @@ struct WorkflowView: View {
                     EmptyText(text: "Loading…")
                 }
             } else {
-                EmptyText(text: task != nil ? "This task isn't part of a workflow run." : "No task selected.")
+                EmptyText(text: task != nil ? "This task isn't a workflow run." : "No task selected.")
             }
         }
         .frame(maxHeight: .infinity, alignment: .top)
         .task(id: store.selectedTaskId) {
             target += 1
             run = nil
+            runId = nil
             error = ""
             await load()
             let off = store.events.add { ev in
@@ -134,7 +136,7 @@ struct WorkflowView: View {
             off()
             target += 1
         }
-        .onChange(of: task?.workflowRun) {
+        .onChange(of: task?.workflow) {
             if run == nil && !loading && error.isEmpty {
                 Task {
                     await load()
@@ -144,13 +146,13 @@ struct WorkflowView: View {
     }
 
     private func relevant(_ ev: ByreEvent) -> Bool {
-        guard ev.seq != 0, let run else {
+        guard ev.seq != 0, let run, let runId else {
             return false
         }
         if ev.kind == "task.created" {
-            return ev.payload.value["workflow_run"] as? String == run.run
+            return ev.payload.value["parent_task_id"] as? String == runId
         }
-        let ids = Set(run.stages.flatMap { $0.attempts.map(\.taskId) })
+        let ids = Set(run.stages.flatMap { $0.attempts.map(\.taskId) } + [runId])
         guard let taskId = ev.taskId else {
             return false
         }
@@ -158,7 +160,7 @@ struct WorkflowView: View {
     }
 
     private func load() async {
-        guard let taskId = store.selectedTaskId, store.findTask(taskId)?.workflowRun != nil else {
+        guard let taskId = store.selectedTaskId, store.findTask(taskId)?.workflow != nil else {
             return
         }
         if loading {
@@ -172,6 +174,7 @@ struct WorkflowView: View {
             let fresh = try await store.api.client.getWorkflowRun(path: .init(taskId: taskId)).ok.body.json
             if started == target {
                 run = fresh
+                runId = taskId
                 error = ""
             }
         } catch {