Add a per-user lead agent and make the right pane task-focused

internal/server/sse.go

@@ -19,6 +19,8 @@ func (s *Server) StreamEvents(w http.ResponseWriter, r *http.Request, params api
 	if params.LastEventID != nil {
 		last = *params.LastEventID
 	}
+	viewer := actor(r)
+	lead := params.Lead != nil && *params.Lead
 	taskID := ""
 	if params.TaskId != nil {
 		taskID = *params.TaskId
@@ -29,10 +31,23 @@ func (s *Server) StreamEvents(w http.ResponseWriter, r *http.Request, params api
 		}
 	}
 	backfill := func(after int64) ([]api.Event, error) {
-		if taskID == "" {
-			return s.store.EventsAfter(r.Context(), after, backfillPage)
+		switch {
+		case lead:
+			return s.store.LeadEvents(r.Context(), viewer, after, backfillPage)
+		case taskID != "":
+			return s.store.TaskEvents(r.Context(), taskID, after, backfillPage)
 		}
-		return s.store.TaskEvents(r.Context(), taskID, after, backfillPage)
+		return s.store.EventsAfter(r.Context(), viewer, after, backfillPage)
+	}
+	wanted := func(ev api.Event) bool {
+		owned := ev.Owner != nil && *ev.Owner == viewer
+		switch {
+		case lead:
+			return owned && ev.AgentSessionId != nil
+		case taskID != "":
+			return ev.TaskId != nil && *ev.TaskId == taskID
+		}
+		return ev.Owner == nil || owned
 	}
 
 	rc := http.NewResponseController(w)
@@ -75,7 +90,7 @@ func (s *Server) StreamEvents(w http.ResponseWriter, r *http.Request, params api
 			if ev.Seq != 0 && ev.Seq <= last {
 				continue
 			}
-			if taskID != "" && (ev.TaskId == nil || *ev.TaskId != taskID) {
+			if !wanted(ev) {
 				continue
 			}
 			if !writeEvent(w, ev) {