Wrap StockDetail test in MemoryRouter to provide Link context; mock useLoaderData remains

app/routes/__tests__/analyze.ticker.ui.test.tsx

@@ -1,6 +1,7 @@
 import { describe, it, expect, vi, beforeEach } from "vitest";
 import { render, screen, fireEvent, waitFor } from "@testing-library/react";
 import StockDetail from "../analyze.ticker";
+import { MemoryRouter } from "react-router";
 
 vi.mock("react-router", async () => {
   const actual = await vi.importActual("react-router");
@@ -35,7 +36,7 @@ describe("StockDetail UI - executionPlan", () => {
   });
 
   it("displays executionPlan when sell decision returned", async () => {
-    render(<StockDetail />);
+    render(<MemoryRouter><StockDetail /></MemoryRouter>);
 
     const runButton = screen.getByRole("button", { name: /Run Trading Graph Analysis/i });
     fireEvent.click(runButton);