feat(FN-2092): merge fusion/fn-2092

packages/dashboard/app/hooks/__tests__/useBackgroundSessions.test.ts

@@ -81,6 +81,24 @@ describe("useBackgroundSessions", () => {
     });
   });
 
+  it("logs a warning when fetching background sessions fails", async () => {
+    const warnSpy = vi.spyOn(console, "warn").mockImplementation(() => {});
+    const networkError = new Error("Network error");
+    mockFetchAiSessions.mockRejectedValueOnce(networkError);
+
+    const { result } = renderHook(() => useBackgroundSessions());
+
+    await waitFor(() => {
+      expect(warnSpy).toHaveBeenCalledWith(
+        "[useBackgroundSessions] Failed to fetch AI sessions:",
+        networkError,
+      );
+    });
+
+    expect(result.current.sessions).toEqual([]);
+    warnSpy.mockRestore();
+  });
+
   it("applies SSE-driven session updates reactively", async () => {
     const { result } = renderHook(() => useBackgroundSessions());
 

packages/dashboard/app/hooks/useBackgroundSessions.ts

@@ -57,7 +57,9 @@ export function useBackgroundSessions(projectId?: string): UseBackgroundSessions
         sessionTimestampsRef.current = nextTimestampMap;
         setSessions(fetched);
       })
-      .catch(() => {});
+      .catch((err) => {
+        console.warn("[useBackgroundSessions] Failed to fetch AI sessions:", err);
+      });
   }, [projectId]);
 
   // Initial load: request state from sibling tabs first, then fetch authoritative API state.