fix(test): add router and query client mocks to WorkspaceFileTree test

The test was missing mocks for useParams (tanstack router) and
useQueryClient after WorkspaceFileTree gained useFileViewNavigation
and a delete-entry callback.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: BunsDev

apps/web/src/components/WorkspaceFileTree.test.tsx

@@ -7,9 +7,15 @@ vi.mock("@tanstack/react-query", async (importOriginal) => {
   return {
     ...actual,
     useQuery: vi.fn(),
+    useQueryClient: () => ({ invalidateQueries: vi.fn() }),
   };
 });
 
+vi.mock("@tanstack/react-router", () => ({
+  useNavigate: () => vi.fn(),
+  useParams: () => null,
+}));
+
 const useQueryMock = vi.mocked(useQuery);
 
 describe("WorkspaceFileTree", () => {