feat(addendum): 补遗追加（FR-M2-10）

- 招标文件解析后可以追加补遗 / 澄清：单独解析、扣 1 次；新条目标「补遗 N」进正式清单，清单回到草稿（AD1）
- 同一种日期、时间不同的旧条目标「已被补遗 N 更新」，逐条确认更新或保留两条（AD2、AD3）
- 项目字段的新值在概览「采用 / 不采用」：采用时以补遗为准、清掉人工值；采用截止时间时日期条目一起确认；
  没确认前查标用旧值，检查预览提示（AD4）
- 补遗不改项目名称、编号、采购人、代理机构、法律体系（更正公告标题会被抽成项目名称）；时间比较按北京时间补时区
- 接口：fields/{key}/pending、checklist-items/{id}/supersession；清单项 origin_document、superseded_by；
  关键日期 replaces；解析结果 dates_superseded、fields_pending；检查预览 pending_updates
- 前端：补遗模式的上传页、解析页结果、概览确认、读标页来源筛选和日期确认、检查预览提示
- 决策 AD1–AD6；方案和落地记录 docs/architecture/addendum-plan.md

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/tests/fixtures/make_bid_fixtures.py

@@ -6,7 +6,8 @@
 - bid-mini-v2.pdf：补上了交换机硬件 BFD → 复查时这个问题「本次已解决」；
 - bid-mini-forms.pdf：v2 的内容 + 格式文件里的规则问题（大写和小写金额不一致、授权书没填投标人名称、
   报价附加条件、另外给了一个优惠报价），措辞故意和评测集的开发词库不同；
-- bid-mini-quals.pdf：v2 的内容 + 企业资质情况表（证书、编号、有效期，全部虚构），资质匹配的端到端测试用。
+- bid-mini-quals.pdf：v2 的内容 + 企业资质情况表（证书、编号、有效期，全部虚构），资质匹配的端到端测试用；
+- addendum-mini.pdf：tender-full.pdf 的更正公告（补遗，FR-M2-10）：递交截止时间推后一周、新增一条 ★ 参数。
 """
 
 from __future__ import annotations
@@ -62,8 +63,18 @@ QUALS = [
     "</table>",
 ]
 
+ADDENDUM = [
+    "<h1>关于某市智慧政务系统集成项目的更正公告（测试样例，内容虚构）</h1>",
+    "<p>各潜在供应商：本项目采购文件更正如下，其他内容不变。</p>",
+    "<p>一、响应文件递交截止时间更正为：2026年12月8日9时30分（北京时间）。</p>",
+    "<p>二、★新增技术要求：存储系统可用容量不低于100TB，并提供产品彩页作为证明材料。</p>",
+    "<p>本更正公告是采购文件的组成部分，与采购文件具有同等效力。</p>",
+    "</body></html>",
+]
+
 if __name__ == "__main__":
     render("bid-mini-v1.pdf", [*COMMON, *TAIL])
     render("bid-mini-v2.pdf", [*COMMON, BFD, *TAIL])
     render("bid-mini-forms.pdf", [*COMMON, BFD, *FORMS, *TAIL])
     render("bid-mini-quals.pdf", [*COMMON, BFD, *QUALS, *TAIL])
+    render("addendum-mini.pdf", ADDENDUM)

server/tests/test_addendum_flow.py

@@ -0,0 +1,109 @@
+"""补遗追加（FR-M2-10，addendum-plan）：追加 → 解析扣 1 次 → 新条目标「补遗 1」、清单回到草稿、
+截止时间进待确认、日期条目标「已被补遗 1 更新」；采用 / 不采用；采用截止时间时日期条目一起确认；检查预览提示。"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from tests.conftest import FIXTURES, User, balance, project_with_tender, run_parse, upload
+
+
+async def add_addendum(u: User, project_id: str) -> tuple[str, dict[str, Any]]:
+    done = await upload(u, "关于某市智慧政务系统集成项目的更正公告.pdf", (FIXTURES / "addendum-mini.pdf").read_bytes())
+    assert done.status_code == 200, done.text
+    r = await u.post(f"/projects/{project_id}/documents", json={"upload_id": done.json()["id"], "role": "addendum"})
+    assert r.status_code == 201, r.text
+    doc = r.json()
+    assert doc["label"] == "补遗 1"
+    job = await run_parse(u, doc["id"])
+    assert job["status"] == "succeeded", job
+    return doc["id"], job
+
+
+def deadline_items(items: list[dict[str, Any]]) -> list[dict[str, Any]]:
+    return [i for i in items if ((i.get("spec") or {}).get("schedule") or {}).get("date_kind") == "bid_deadline"]
+
+
+async def parsed_project(u: User) -> str:
+    project_id, tender_id = await project_with_tender(u, "tender-full.pdf")
+    assert (await run_parse(u, tender_id))["status"] == "succeeded"
+    return project_id
+
+
+async def test_addendum_merge_and_accept(user: User) -> None:
+    project_id = await parsed_project(user)
+    before = (await user.get(f"/projects/{project_id}")).json()
+    assert before["deadline_at"].startswith("2026-12-01T01:30")
+    await user.put(f"/projects/{project_id}/fields/deadline_at", json={"value": "2026-12-02T09:30:00+08:00"})
+    assert (await user.post(f"/projects/{project_id}/checklist/confirm")).status_code == 200
+    quota = await balance(user)
+
+    _, job = await add_addendum(user, project_id)
+    result = job["result"]
+    assert result["dates_superseded"] == 1 and result["fields_pending"] >= 1 and result["items_added"] >= 2
+    assert await balance(user) == quota - 1  # 补遗单独扣 1 次解析
+
+    overview = (await user.get(f"/projects/{project_id}/checklist")).json()
+    assert overview["status"] == "draft" and overview["counts"]["superseded_pending"] == 1  # 并入后回到草稿（AD1）
+    items = (await user.get(f"/projects/{project_id}/checklist/items")).json()["items"]
+    new_items = [i for i in items if i["origin_label"] == "补遗 1"]
+    assert any("存储系统" in i["title"] for i in new_items)  # 新条目直接进正式清单
+    assert all(i["origin_document"]["label"] == "补遗 1" for i in new_items)
+    old, new = sorted(deadline_items(items), key=lambda i: i["origin_label"] != "补遗 1")[::-1]
+    assert old["superseded_by"] == {"item_id": new["id"], "document_label": "补遗 1", "confirmed": False}
+    assert new["superseded_by"] is None
+
+    # 没确认之前项目用旧值（AD4），概览和检查预览都能看到待确认
+    detail = (await user.get(f"/projects/{project_id}")).json()
+    assert detail["deadline_at"].startswith("2026-12-02T01:30")
+    (f,) = [x for x in detail["fields"] if x["key"] == "deadline_at"]
+    assert f["source"] == "human" and f["pending"]["value"].startswith("2026-12-08T09:30")
+    assert f["pending"]["document_label"] == "补遗 1"
+    assert any(d["superseded_pending"] for d in detail["key_dates"])
+    preview = (await user.get(f"/projects/{project_id}/check-preview")).json()
+    assert preview["pending_updates"] >= 2
+
+    # 采用截止时间：清掉人工值、以补遗为准；清单里「投标截止」条目的更新一起确认（AD3）
+    r = await user.post(f"/projects/{project_id}/fields/deadline_at/pending", json={"accept": True})
+    assert r.status_code == 200, r.text
+    assert r.json()["source"] == "ai" and r.json()["pending"] is None and r.json()["value"].startswith("2026-12-08")
+    detail = (await user.get(f"/projects/{project_id}")).json()
+    assert detail["deadline_at"].startswith("2026-12-08T01:30")
+    (bid,) = [d for d in detail["key_dates"] if d["label"] == "投标截止"]
+    assert bid["replaces"]["document_label"] == "补遗 1" and bid["replaces"]["at"].startswith("2026-12-01")
+    old_now = (await user.get(f"/checklist-items/{old['id']}")).json()
+    assert old_now["deleted_at"] and old_now["superseded_by"]["confirmed"]
+    assert (await user.get(f"/projects/{project_id}/checklist")).json()["counts"]["superseded_pending"] == 0
+    r = await user.post(f"/projects/{project_id}/fields/deadline_at/pending", json={"accept": True})
+    assert r.status_code == 409 and r.json()["code"] == "no_pending_value"
+
+
+async def test_addendum_reject_keeps_both(user: User) -> None:
+    project_id = await parsed_project(user)
+    await add_addendum(user, project_id)
+    items = (await user.get(f"/projects/{project_id}/checklist/items")).json()["items"]
+    (old,) = [i for i in deadline_items(items) if i["superseded_by"]]
+
+    r = await user.post(f"/checklist-items/{old['id']}/supersession", json={"accept": False})
+    assert r.status_code == 200 and r.json()["superseded_by"] is None and r.json()["deleted_at"] is None
+    assert len(deadline_items((await user.get(f"/projects/{project_id}/checklist/items")).json()["items"])) == 2
+    r = await user.post(f"/checklist-items/{old['id']}/supersession", json={"accept": True})
+    assert r.status_code == 409 and r.json()["code"] == "not_superseded"
+
+    r = await user.post(f"/projects/{project_id}/fields/deadline_at/pending", json={"accept": False})
+    assert r.json()["pending"] is None and r.json()["value"].startswith("2026-12-01")
+    assert (await user.get(f"/projects/{project_id}")).json()["deadline_at"].startswith("2026-12-01T01:30")
+    assert (await user.get(f"/projects/{project_id}/check-preview")).json()["pending_updates"] == 0
+
+    # 已递交的项目只读
+    assert (await user.post(f"/projects/{project_id}/transitions", json={"action": "submit"})).status_code == 200
+    r = await user.post(f"/checklist-items/{old['id']}/supersession", json={"accept": True})
+    assert r.status_code == 409 and r.json()["code"] == "project_read_only"
+
+
+def test_same_time_ignores_missing_timezone() -> None:
+    """补遗只是复述原时间时不关联；模型给的时间有时带时区、有时不带，按北京时间比。"""
+    from bid_doctor.checklist.addendum import _same_time  # pyright: ignore[reportPrivateUsage]
+
+    assert _same_time("2026-12-01T09:30", "2026-12-01T09:30:00+08:00")
+    assert not _same_time("2026-12-01T09:30", "2026-12-08T09:30:00+08:00")