test: 接入 jsdom 测试栈, 把 15 个 React hooks 纳入 80% 覆盖率门禁

新增 jsdom + @testing-library/react, 为 lib/** 全部 use*.ts hooks 写 renderHook 单测:
生成/CRUD(world/character/generator/outline/accept/foreshadow/rules)、
SSE流(draftStream/reviewStream)、定时轮询(autosave/jobPoll/kimiOauth)、
文风与注入(refine/styleLearn/injection)。覆盖率 mock api 客户端+Toast, 不打真实 LLM。
vitest.config.ts 去掉 use*.ts 排除; 前端覆盖率 63%→95%。CLAUDE.md 同步说明。

apps/web/lib/outline/useOutline.test.ts

@@ -0,0 +1,89 @@
+// @vitest-environment jsdom
+import { act, renderHook } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+import { useOutline } from "./useOutline";
+import type { OutlineChapterView } from "@/lib/api/types";
+
+// 后端客户端与 Toast 是 hook 的外部副作用边界，单测一律 mock。
+const post = vi.fn();
+const toast = vi.fn();
+vi.mock("@/lib/api/client", () => ({ api: { POST: (...a: unknown[]) => post(...a) } }));
+vi.mock("@/components/Toast", () => ({ useToast: () => toast }));
+
+function makeChapter(no: number): OutlineChapterView {
+  return { no, volume: 1 };
+}
+
+describe("useOutline", () => {
+  beforeEach(() => {
+    post.mockReset();
+    toast.mockReset();
+  });
+  afterEach(() => vi.clearAllMocks());
+
+  it("空初始：status=idle", () => {
+    const { result } = renderHook(() => useOutline([]));
+    expect(result.current.status).toBe("idle");
+    expect(result.current.chapters).toEqual([]);
+    expect(result.current.error).toBeNull();
+  });
+
+  it("非空初始：status=ready 并保留章节", () => {
+    const initial = [makeChapter(1)];
+    const { result } = renderHook(() => useOutline(initial));
+    expect(result.current.status).toBe("ready");
+    expect(result.current.chapters).toEqual(initial);
+  });
+
+  it("生成成功：status 走到 ready 并填充章节并弹成功 toast", async () => {
+    const chapters = [makeChapter(1), makeChapter(2)];
+    post.mockResolvedValue({ data: { chapters }, error: null });
+
+    const { result } = renderHook(() => useOutline([]));
+    await act(async () => {
+      await result.current.generate("p1", 1);
+    });
+
+    expect(result.current.status).toBe("ready");
+    expect(result.current.chapters).toEqual(chapters);
+    expect(result.current.error).toBeNull();
+    expect(toast).toHaveBeenCalledWith("大纲已生成", "success");
+  });
+
+  it("data.chapters 为空时章节回退为空数组", async () => {
+    post.mockResolvedValue({ data: { chapters: null }, error: null });
+    const { result } = renderHook(() => useOutline([]));
+    await act(async () => {
+      await result.current.generate("p1", 1);
+    });
+    expect(result.current.status).toBe("ready");
+    expect(result.current.chapters).toEqual([]);
+  });
+
+  it("后端返回业务错误：status=error 并 surface 友好文案", async () => {
+    post.mockResolvedValue({
+      data: null,
+      error: { error: { code: "LLM_UNAVAILABLE" } },
+    });
+    const { result } = renderHook(() => useOutline([]));
+    await act(async () => {
+      await result.current.generate("p1", 1);
+    });
+
+    expect(result.current.status).toBe("error");
+    expect(result.current.error?.code).toBe("OUTLINE_FAILED");
+    expect(result.current.error?.message).toContain("provider");
+    expect(toast).toHaveBeenCalledWith(expect.any(String), "error");
+  });
+
+  it("data 为空且无 error 也走错误分支", async () => {
+    post.mockResolvedValue({ data: null, error: null });
+    const { result } = renderHook(() => useOutline([]));
+    await act(async () => {
+      await result.current.generate("p1", 1);
+    });
+    expect(result.current.status).toBe("error");
+    expect(result.current.error?.code).toBe("OUTLINE_FAILED");
+  });
+});