Promote dev → uat: GRO-2159 drag-to-reorder + re-optimize (#64)

src/__tests__/Routes.test.tsx

@@ -79,6 +79,9 @@ function mockFetch(meRole: "manager" | "groomer") {
     if (url === "/api/routes/optimize" && opts?.method === "POST") {
       return Promise.resolve({ ok: true, json: () => Promise.resolve(ROUTE_RESPONSE) } as Response);
     }
+    if (/^\/api\/routes\/[^/]+\/reorder$/.test(url) && opts?.method === "PATCH") {
+      return Promise.resolve({ ok: true, json: () => Promise.resolve(ROUTE_RESPONSE) } as Response);
+    }
     return Promise.resolve({ ok: true, json: () => Promise.resolve({}) } as Response);
   });
 }
@@ -124,6 +127,33 @@ describe("RoutesPage", () => {
     expect(screen.queryByText("Groomer")).not.toBeInTheDocument();
   });
 
+  it("renders a drag handle for each stop (drag-to-reorder enabled)", async () => {
+    global.fetch = mockFetch("manager") as unknown as typeof fetch;
+    render(<RoutesPage />);
+
+    await waitFor(() => expect(screen.getByText("Alice")).toBeInTheDocument());
+    expect(screen.getByLabelText("Drag to reorder Alice")).toBeInTheDocument();
+    expect(screen.getByLabelText("Drag to reorder Bob")).toBeInTheDocument();
+  });
+
+  it("flags the tight-schedule conflict on the affected stop", async () => {
+    global.fetch = mockFetch("manager") as unknown as typeof fetch;
+    render(<RoutesPage />);
+
+    await waitFor(() => expect(screen.getByText("Bob")).toBeInTheDocument());
+    expect(
+      screen.getByText(/Tight schedule — travel \+ buffer may exceed the gap/)
+    ).toBeInTheDocument();
+  });
+
+  it("does not show the re-optimize hint before any manual reorder", async () => {
+    global.fetch = mockFetch("manager") as unknown as typeof fetch;
+    render(<RoutesPage />);
+
+    await waitFor(() => expect(screen.getByText("Alice")).toBeInTheDocument());
+    expect(screen.queryByText("Re-optimize")).not.toBeInTheDocument();
+  });
+
   it("calls the optimize endpoint when Optimize is clicked", async () => {
     const fetchMock = mockFetch("manager");
     global.fetch = fetchMock as unknown as typeof fetch;