feat: pin sessions to workspace revisions

frontend/src/shell/f1-loop.test.tsx

@@ -9,6 +9,7 @@ import { App } from "../App";
 import { useSessionStore } from "../store/sessionStore";
 
 beforeEach(() => {
+  localStorage.clear();
   FakeEventSource.instances = [];
   (globalThis as any).EventSource = FakeEventSource;
   useSessionStore.getState().resetSession();
@@ -19,6 +20,9 @@ test("F1: create session -> widget via SSE -> respond -> POST /response", async
   server.use(
     http.post("http://localhost:8787/sessions", () => HttpResponse.json({ id: "s1" })),
     http.get("http://localhost:8787/sessions", () => HttpResponse.json([])),
+    http.get("http://localhost:8787/settings", () => HttpResponse.json({
+      workspace: "default", provider: "zai", model: "glm-5.2", thinking: "low",
+    })),
     http.get("http://localhost:8787/workspaces", () =>
       HttpResponse.json([{ name: "default", file: "default.db" }]),
     ),