Cover timeline quote compatibility

Add a regression test for home timelines returning quote posts in the
Mastodon Quote entity shape expected by current Mastodon clients.

#421

Assisted-by: OpenCode:gpt-5.5

Author: dahlia

src/api/v1/timelines.test.ts

@@ -142,7 +142,6 @@ describe.sequential("/api/v1/timelines/list/:list_id", () => {
     expect(json[0].media_attachments[0].type).toBe("unknown");
   });
 });
-
 describe.sequential("/api/v1/timelines/home", () => {
   let owner: Awaited<ReturnType<typeof createAccount>>;
   let approvedAuthor: Awaited<ReturnType<typeof createAccount>>;
@@ -222,3 +221,95 @@ describe.sequential("/api/v1/timelines/home", () => {
     expect(ids).toEqual([approvedPostId]);
   });
 });
+
+describe.sequential("/api/v1/timelines/home", () => {
+  let owner: Awaited<ReturnType<typeof createAccount>>;
+  let client: Awaited<ReturnType<typeof createOAuthApplication>>;
+  let accessToken: Awaited<ReturnType<typeof getAccessToken>>;
+
+  beforeEach(async () => {
+    await cleanDatabase();
+
+    owner = await createAccount();
+    client = await createOAuthApplication({
+      scopes: ["read:statuses"],
+    });
+    accessToken = await getAccessToken(client, owner, ["read:statuses"]);
+  });
+
+  it("serializes quotes using the Mastodon Quote entity format", async () => {
+    expect.assertions(7);
+
+    const authorId = crypto.randomUUID() as Uuid;
+    const quotedPostId = uuidv7();
+    const quotePostId = uuidv7();
+
+    await db
+      .insert(instances)
+      .values({ host: "remote.test" })
+      .onConflictDoNothing();
+
+    await db.insert(accounts).values({
+      id: authorId,
+      iri: "https://remote.test/users/author",
+      instanceHost: "remote.test",
+      type: "Person",
+      name: "Remote author",
+      emojis: {},
+      handle: "@author@remote.test",
+      bioHtml: "",
+      url: "https://remote.test/@author",
+      protected: false,
+      inboxUrl: "https://remote.test/users/author/inbox",
+    });
+
+    await db.insert(follows).values({
+      iri: "https://hollo.test/follows/author",
+      followingId: authorId,
+      followerId: owner.id,
+      approved: new Date(),
+    });
+
+    await db.insert(posts).values([
+      {
+        id: quotedPostId,
+        iri: `https://remote.test/notes/${quotedPostId}`,
+        type: "Note",
+        accountId: authorId,
+        visibility: "public",
+        content: "Quoted post",
+        contentHtml: "<p>Quoted post</p>",
+        published: new Date(),
+      },
+      {
+        id: quotePostId,
+        iri: `https://remote.test/notes/${quotePostId}`,
+        type: "Note",
+        accountId: authorId,
+        quoteTargetId: quotedPostId,
+        visibility: "public",
+        content: "Quote post",
+        contentHtml: "<p>Quote post</p>",
+        published: new Date(),
+      },
+    ]);
+
+    const response = await app.request("/api/v1/timelines/home", {
+      method: "GET",
+      headers: {
+        authorization: bearerAuthorization(accessToken),
+      },
+    });
+
+    expect(response.status).toBe(200);
+    expect(response.headers.get("content-type")).toBe("application/json");
+
+    const json = await response.json();
+
+    expect(Array.isArray(json)).toBe(true);
+    expect(json[0].id).toBe(quotePostId);
+    expect(json[0].quote_id).toBe(quotedPostId);
+    expect(json[0].quote.state).toBe("accepted");
+    expect(json[0].quote.quoted_status.id).toBe(quotedPostId);
+  });
+});