test(frontend): cover configured model selector

frontend/src/shell/AppShell.new-session.test.tsx

@@ -1,4 +1,4 @@
-import { render, screen, waitFor } from "@testing-library/react";
+import { render, screen, waitFor, within } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import { http, HttpResponse, delay } from "msw";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
@@ -90,6 +90,37 @@ test("a failed create restores the landing view and preserves the question for r
   expect(FakeEventSource.instances).toHaveLength(0);
 });
 
+test("model selector shows the three Pi-enabled models and persists the selected provider", async () => {
+  let saved: unknown;
+  server.use(
+    http.get("http://localhost:8787/settings", () => HttpResponse.json({
+      workspace: "default", provider: "zai", model: "glm-5.2", thinking: "low",
+    })),
+    http.get("http://localhost:8787/models", () => HttpResponse.json({ models: [
+      { provider: "zai", id: "glm-5.2", name: "GLM-5.2", reasoning: true },
+      { provider: "deepseek", id: "deepseek-v4-flash", name: "DeepSeek V4 Flash", reasoning: true },
+      { provider: "local-qwen", id: "qwen3.6-35b-a3b", name: "Qwen3.6 35B A3B Local", reasoning: false },
+    ] })),
+    http.put("http://localhost:8787/settings", async ({ request }) => {
+      const body = await request.json() as Record<string, string>;
+      saved = body;
+      return HttpResponse.json(body);
+    }),
+  );
+  renderShell();
+
+  const select = await screen.findByRole("combobox", { name: "Model" });
+  await waitFor(() => {
+    expect(within(select).getAllByRole("option").map((option) => option.textContent)).toEqual([
+      "GLM-5.2", "DeepSeek V4 Flash", "Qwen3.6 35B A3B Local",
+    ]);
+  });
+  await userEvent.selectOptions(select, "qwen3.6-35b-a3b");
+  await waitFor(() => expect(saved).toMatchObject({
+    provider: "local-qwen", model: "qwen3.6-35b-a3b",
+  }));
+});
+
 
 test("marks the composer as awaiting input for a pending freetext gate", () => {
   useSessionStore.setState({