feat(frontend): session mutation + documents API client and types

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/api/sessions.test.ts

@@ -1,6 +1,10 @@
 import { http, HttpResponse } from "msw";
 import { server } from "../test/msw";
 import { createSession, listSessions } from "./sessions";
+import {
+  renameSession, setSessionGroup, archiveSession, unarchiveSession,
+  deleteSession, getSessionDocuments,
+} from "./sessions";
 
 test("createSession POSTs only {question} and returns the id", async () => {
   let body: unknown = null;
@@ -19,3 +23,44 @@ test("listSessions GETs the array", async () => {
   const rows = await listSessions();
   expect(rows[0].id).toBe("s1");
 });
+
+test("renameSession POSTs {name}", async () => {
+  let body: unknown = null;
+  server.use(http.post("http://localhost:8787/sessions/s1/rename", async ({ request }) => {
+    body = await request.json();
+    return new HttpResponse(null, { status: 204 });
+  }));
+  await renameSession("s1", "Nome");
+  expect(body).toEqual({ name: "Nome" });
+});
+
+test("setSessionGroup POSTs {group}", async () => {
+  let body: unknown = null;
+  server.use(http.post("http://localhost:8787/sessions/s1/group", async ({ request }) => {
+    body = await request.json();
+    return new HttpResponse(null, { status: 204 });
+  }));
+  await setSessionGroup("s1", "G");
+  expect(body).toEqual({ group: "G" });
+});
+
+test("archive / unarchive / delete hit the right verbs+paths", async () => {
+  const hits: string[] = [];
+  server.use(
+    http.post("http://localhost:8787/sessions/s1/archive", () => { hits.push("archive"); return new HttpResponse(null, { status: 204 }); }),
+    http.post("http://localhost:8787/sessions/s1/unarchive", () => { hits.push("unarchive"); return new HttpResponse(null, { status: 204 }); }),
+    http.delete("http://localhost:8787/sessions/s1", () => { hits.push("delete"); return new HttpResponse(null, { status: 204 }); }),
+  );
+  await archiveSession("s1");
+  await unarchiveSession("s1");
+  await deleteSession("s1");
+  expect(hits).toEqual(["archive", "unarchive", "delete"]);
+});
+
+test("getSessionDocuments GETs the array", async () => {
+  server.use(http.get("http://localhost:8787/sessions/s1/documents", () =>
+    HttpResponse.json([{ phase: "—", key: "question", title: "t", format: "text", content: "q" }]),
+  ));
+  const docs = await getSessionDocuments("s1");
+  expect(docs[0].key).toBe("question");
+});