feat(web): 审稿改稿闭环——一键采纳/AI改写/正文高亮定位编辑/伏笔确认/草稿自动保存/章节目录

- 冲突「采纳改法」：有补丁瞬时改入终稿并选中；无补丁但可定位则采纳时调 AI（refiner）重写该段套入；定位不到提示手改
- 正文改为行内高亮叠层编辑器（与页面同底色、随内容增高、无滚动条），点冲突卡/锚点整页滚到并选中+闪烁
- 仅对可在正文定位的冲突显示「跳转」/锚点；locate 支持从 where 引号抽原文，杜绝定位失败刷屏
- 伏笔建议卡：新埋一键登记（预填表单）/ 疑似回收一键标记 CLOSED（复用现有端点）
- 审稿页草稿自动保存（防抖 PUT /draft），与「验收本章」解耦，刷新不丢
- 写作路由带章号 ?chapter=N + 验收成功面板/大纲页「写下一章」入口；写作目录从大纲列出全部章节

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/web/lib/workbench/chapter.test.ts

@@ -0,0 +1,55 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  WORKBENCH_CHAPTER_NO,
+  buildChapterEntries,
+  parseChapterParam,
+} from "./chapter";
+
+describe("parseChapterParam", () => {
+  it("parses a valid positive chapter number", () => {
+    expect(parseChapterParam("2")).toBe(2);
+    expect(parseChapterParam("17")).toBe(17);
+  });
+
+  it("takes the first value when given an array", () => {
+    expect(parseChapterParam(["3", "9"])).toBe(3);
+  });
+
+  it("falls back to chapter 1 for missing/invalid/<1 values", () => {
+    expect(parseChapterParam(undefined)).toBe(WORKBENCH_CHAPTER_NO);
+    expect(parseChapterParam("")).toBe(WORKBENCH_CHAPTER_NO);
+    expect(parseChapterParam("abc")).toBe(WORKBENCH_CHAPTER_NO);
+    expect(parseChapterParam("0")).toBe(WORKBENCH_CHAPTER_NO);
+    expect(parseChapterParam("-4")).toBe(WORKBENCH_CHAPTER_NO);
+  });
+});
+
+describe("buildChapterEntries", () => {
+  it("dedupes by no and sorts ascending", () => {
+    const out = buildChapterEntries(
+      [
+        { no: 3, title: "c3" },
+        { no: 1, title: "c1" },
+        { no: 3, title: "dup" },
+      ],
+      1,
+    );
+    expect(out.map((e) => e.no)).toEqual([1, 3]);
+    expect(out[1]?.title).toBe("c3"); // first wins on duplicate
+  });
+
+  it("always includes the current chapter even if beyond the outline", () => {
+    const out = buildChapterEntries([{ no: 1 }, { no: 2 }], 5);
+    expect(out.map((e) => e.no)).toEqual([1, 2, 5]);
+  });
+
+  it("returns just the current chapter when the outline is empty", () => {
+    expect(buildChapterEntries([], 1)).toEqual([{ no: 1 }]);
+  });
+
+  it("drops invalid chapter numbers from the outline", () => {
+    const out = buildChapterEntries([{ no: 0 }, { no: -2 }, { no: 2 }], 1);
+    expect(out.map((e) => e.no)).toEqual([1, 2]);
+  });
+});