fix(FN-8764): refresh stale task activity feed

.changeset/refresh-empty-task-activity-feed.md

@@ -0,0 +1,7 @@
+---
+"@runfusion/fusion": patch
+---
+
+summary: Refresh an empty task Activity Feed when operators open it after execution has started.
+category: fix
+dev: Shared task-detail hosts refetch complete task logs when an empty Feed is selected.

packages/dashboard/app/components/TaskDetailModal.tsx

@@ -4355,14 +4355,46 @@ export function TaskDetailContent({
     }
   }, [oversightActive, activitySegment]);
 
+  /*
+  FNXC:TaskActivityFeedFreshness 2026-08-07-08:30:
+  Task list and SSE snapshots intentionally strip task.log. If a shared detail host captured an
+  empty full-detail snapshot before activity was written, selecting Feed must retry that complete
+  read instead of preserving "(no activity)" forever. Populated feeds remain snapshot-stable and
+  incur no extra request; Live and Raw keep their independent streaming paths.
+  */
+  const activityFeedIsEmpty = !workingTask.log?.length;
+  const refreshEmptyActivityFeed = useCallback(() => {
+    if (!activityFeedIsEmpty) return;
+
+    const requestGeneration = ++detailRequestGenerationRef.current;
+    requestTaskDetail(task.id, projectId)
+      .then((detail) => {
+        if (!mountedRef.current
+          || detailRequestGenerationRef.current !== requestGeneration
+          || activeTaskIdRef.current !== detail.id) return;
+
+        const promptResponse = latestPromptResponseRef.current;
+        const promptResponseMatchesDetail = promptResponse?.key === `${projectId ?? ""}:${detail.id}`;
+        const detailWithLatestPrompt = promptResponseMatchesDetail
+          ? { ...detail, prompt: promptResponse.prompt } as TaskDetail
+          : detail;
+        setFullDetail((previous) => previous?.id === detail.id
+          ? mergeTaskSnapshot(previous, detailWithLatestPrompt, { fullSnapshot: true })
+          : detailWithLatestPrompt);
+        setDetailLoading(false);
+      })
+      .catch(() => undefined);
+  }, [activityFeedIsEmpty, task.id, projectId, requestTaskDetail]);
+
   const selectActivityView = useCallback((value: ActivitySegment) => {
     activityViewMenuViewportGuardUntilRef.current = 0;
     setActiveTab("chat");
     setActivitySegment(value);
+    if (value === "feed") refreshEmptyActivityFeed();
     setShowActivityViewMenu(false);
     setActivityViewMenuPosition(null);
     requestAnimationFrame(() => activityViewButtonRef.current?.focus());
-  }, []);
+  }, [refreshEmptyActivityFeed]);
 
   const handleActivityTabKeyDown = useCallback((event: React.KeyboardEvent<HTMLButtonElement>) => {
     const shouldOpenMenu = event.key === "ArrowDown" || (event.altKey && event.key === "ArrowDown");

packages/dashboard/app/components/__tests__/TaskDetailModal.test.tsx

@@ -3,7 +3,7 @@ FNXC:TaskDetailTabs 2026-06-17-08:20:
 FN-7324 keeps the stable internal `chat` tab as Activity for explicit legacy links, but the omitted non-done default is now planner Chat. Tests that assert Definition-only sections must opt into `initialTab="definition"` so they verify the intended surface instead of the Chat landing state.
 */
 import { describe, it, expect, vi } from "vitest";
-import { fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { act, fireEvent, render, screen, waitFor } from "@testing-library/react";
 import React, { type ComponentProps } from "react";
 import userEvent from "@testing-library/user-event";
 import {
@@ -692,11 +692,14 @@ describe("TaskDetailModal GitHub tracking CTA", () => {
 });
 
 describe("TaskDetailModal Activity feed loading", () => {
-  function renderActivityFeedModal(task: ReturnType<typeof makeTask> | Record<string, unknown>) {
+  function renderActivityFeedModal(
+    task: ReturnType<typeof makeTask> | Record<string, unknown>,
+    initialTab: ComponentProps<typeof TaskDetailModal>["initialTab"] = "logs",
+  ) {
     return render(
       <TaskDetailModal
         task={task as any}
-        initialTab="logs"
+        initialTab={initialTab}
         onClose={noop}
         onMoveTask={noopMove}
         onDeleteTask={noopDelete}
@@ -783,6 +786,39 @@ describe("TaskDetailModal Activity feed loading", () => {
     expect(screen.queryByText("(no activity)")).not.toBeInTheDocument();
   });
 
+  /*
+  FNXC:TaskActivityFeedFreshness 2026-08-07-08:30:
+  Modal, main-panel, split-list, dock, popup, desktop, and mobile task details all render the shared
+  TaskDetailContent feed. Entering Feed must refresh its full task snapshot because board/SSE rows
+  deliberately carry log=[]; otherwise a detail opened before activity exists stays empty forever.
+  */
+  it("refreshes an empty Feed when the persisted task log has gained activity", async () => {
+    const user = userEvent.setup();
+    const { fetchTaskDetail } = await import("../../api");
+    const refresh = createDeferred<ReturnType<typeof makeTask>>();
+    vi.mocked(fetchTaskDetail).mockReset();
+    vi.mocked(fetchTaskDetail).mockReturnValueOnce(refresh.promise as any);
+
+    renderActivityFeedModal(
+      makeTask({ id: "FN-FEED-REFRESH", prompt: "# Already loaded", log: [] }),
+      "chat",
+    );
+
+    await selectActivityView(user, "feed");
+    expect(fetchTaskDetail).toHaveBeenCalledWith("FN-FEED-REFRESH", undefined);
+
+    await act(async () => {
+      refresh.resolve(makeTask({
+        id: "FN-FEED-REFRESH",
+        prompt: "# Already loaded",
+        log: [{ timestamp: "2026-08-07T08:20:00.000Z", action: "Executor started" }],
+      }));
+    });
+
+    expect(await screen.findByText("Executor started")).toBeInTheDocument();
+    expect(screen.queryByText("(no activity)")).not.toBeInTheDocument();
+  });
+
   it("preserves truncated activity message after detail load", async () => {
     const { fetchTaskDetail } = await import("../../api");
     vi.mocked(fetchTaskDetail).mockReset();