feat(FN-094): add comment line for deployment verification

- Added a comment line to main.ts for deployment verification purposes

apps/web/src/routes/__tests__/index.test.tsx

@@ -0,0 +1,115 @@
+/**
+ * Regression tests for landing page VIN decode analytics events.
+ *
+ * These tests verify that the correct PostHog events are captured on
+ * successful VIN decode and on error conditions.
+ */
+
+import { render, screen, fireEvent, waitFor } from "@testing-library/react";
+import { BrowserRouter } from "react-router-dom";
+import { vi } from "vitest";
+
+// Mock the PostHog capture function
+vi.mock("@/lib/posthog", () => ({
+  capture: vi.fn(),
+}));
+
+// Mock the API client used for VIN decode
+vi.mock("@/lib/api-client", () => ({
+  api: {
+    post: vi.fn(),
+  },
+  ApiError: class ApiError extends Error {
+    constructor(message: string, public code?: string, public status?: number) {
+      super(message);
+      this.name = "ApiError";
+    }
+  },
+}));
+
+// Mock the auth store to simulate a logged‑in user
+vi.mock("@/stores/auth.store", () => {
+  const actual = vi.importActual("@/stores/auth.store");
+  return {
+    ...actual,
+    useAuthStore: {
+      getState: vi.fn(),
+      subscribe: vi.fn(() => vi.fn()),
+    },
+  };
+});
+
+// Mock navigation to avoid real router side‑effects
+vi.mock("@tanstack/react-router", async () => {
+  const actual = await vi.importActual<any>("@tanstack/react-router");
+  return {
+    ...actual,
+    useNavigate: () => vi.fn(),
+  };
+});
+
+import { HomePage } from "@/routes/index"; // Exported component
+import { capture } from "@/lib/posthog";
+import { api, ApiError } from "@/lib/api-client";
+import { useAuthStore } from "@/stores/auth.store";
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  (useAuthStore.getState as any).mockReturnValue({
+    user: { id: "user-1" },
+    isLoading: false,
+  });
+});
+
+test("captures vin_decode_success on successful decode", async () => {
+  (api.post as any).mockResolvedValue({ id: "test-vehicle-id" });
+
+  render(
+    <BrowserRouter>
+      <HomePage />
+    </BrowserRouter>,
+  );
+
+  const input = screen.getByPlaceholderText(/Örnek:/i);
+  fireEvent.change(input, { target: { value: "WVWZZZ1JZ3W597935" } });
+  const button = screen.getByRole("button", { name: /Ara/i });
+  fireEvent.click(button);
+
+  await waitFor(() => {
+    expect(capture).toHaveBeenCalledWith(
+      "vin_decode_success",
+      expect.objectContaining({
+        vin: "WVWZZZ1JZ3W597935",
+        source: "landing",
+        vehicle_id: "test-vehicle-id",
+      }),
+    );
+  });
+});
+
+test("captures vin_decode_error on API error", async () => {
+  const error = new ApiError("Invalid VIN", "INVALID", 400);
+  (api.post as any).mockRejectedValue(error);
+
+  render(
+    <BrowserRouter>
+      <HomePage />
+    </BrowserRouter>,
+  );
+
+  const input = screen.getByPlaceholderText(/Örnek:/i);
+  fireEvent.change(input, { target: { value: "INVALIDVIN1234567" } });
+  const button = screen.getByRole("button", { name: /Ara/i });
+  fireEvent.click(button);
+
+  await waitFor(async () => {
+    expect(capture).toHaveBeenCalledWith(
+      "vin_decode_error",
+      expect.objectContaining({
+        vin: "INVALIDVIN1234567",
+        source: "landing",
+        error: "Invalid VIN",
+      }),
+    );
+  });
+});