feat(FN-4095): restore green verification gates and add QuickChatFAB regres

Restores green verification gates for executor review verdicts (FN-4095) with a targeted core store change, and adds a regression test ensuring the QuickChatFAB scrolls to the bottom when opened.

Fusion-Task-Id: FN-4095

packages/core/src/store.ts

@@ -3277,6 +3277,8 @@ export class TaskStore extends EventEmitter<TaskStoreEvents> {
         task.status = undefined;
         task.error = undefined;
         task.blockedBy = undefined;
+        task.paused = undefined;
+        task.pausedByAgentId = undefined;
 
         const hasNonPendingStepProgress = task.steps.some((step) => step.status !== "pending");
         const preserveStepProgress =

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

@@ -811,4 +811,29 @@ describe("QuickChatFAB session-first UX", () => {
       expect(scrollTopValue).toBe(scrollHeightValue);
     });
   });
+
+  it("FN-4095: snaps to bottom on uncontrolled initial open (FAB click) with preloaded messages", async () => {
+    mockFetchChatMessages.mockResolvedValueOnce({
+      messages: [{ id: "msg-open", sessionId: "session-model", role: "assistant", content: "Loaded", createdAt: new Date().toISOString() }],
+    });
+
+    render(<QuickChatFAB addToast={vi.fn()} projectId="proj-1" />);
+    fireEvent.click(screen.getByTestId("quick-chat-fab"));
+
+    const messages = await screen.findByTestId("quick-chat-messages");
+    let scrollTopValue = 0;
+    const scrollHeightValue = 1400;
+    Object.defineProperty(messages, "scrollHeight", { configurable: true, get: () => scrollHeightValue });
+    Object.defineProperty(messages, "scrollTop", {
+      configurable: true,
+      get: () => scrollTopValue,
+      set: (value: number) => {
+        scrollTopValue = value;
+      },
+    });
+
+    await waitFor(() => {
+      expect(scrollTopValue).toBe(scrollHeightValue);
+    });
+  });
 });

packages/engine/src/__tests__/executor-review-verdicts.test.ts

@@ -133,7 +133,7 @@ describe("TaskExecutor enginePaused soft pause (no agent termination)", () => {
       "Task marked complete with summary. All steps done. Moving to in-review.",
     );
     expect(watchdogSpy).toHaveBeenCalledWith("FN-001", "fn_task_done");
-    expect(store.updateTask).toHaveBeenCalledWith("FN-001", { status: null });
+    expect(store.updateTask).toHaveBeenCalledWith("FN-001", expect.objectContaining({ status: null }));
     expect(store.moveTask).toHaveBeenCalledWith("FN-001", "in-review");
   });