feat: M3 — 伏笔账本 + 节奏引擎 + 大纲（含并发记账 bugfix）

- 伏笔账本：纯函数状态机(OPEN/PARTIAL/CLOSED/OVERDUE) + ForeshadowLedger repo；验收后到期扫描(BackgroundTask 自建 session 置 OVERDUE)；登记/状态变更端点 - 节奏 + 三审齐：foreshadow-analyst + pace-checker 并入 LangGraph 并行审(REVIEW_SPECS)，collect 分列落 chapter_reviews(conflicts/foreshadow_sug/pace)，review SSE 加 foreshadow/pace 事件 - 大纲：outliner Agent 产 OutlineResult(含 foreshadow_windows)，POST /outline 逐章 upsert outline 表；GET /foreshadow?status= 看板 - 前端：伏笔四泳道看板(OVERDUE 琥珀) + 大纲编辑器(窗口徽标) + 节奏节拍图(▁▃▅) + 审稿页消费 foreshadow/pace SSE - bugfix(T3.8)：并行三审共用请求 session 记账触发 'Session is already flushing' → foreshadow/pace 静默丢失；SqlAlchemyLedgerSink.record 改 add-only(靠端点/事务 commit)，加并发回归测试 - M3 E2E：真实 DB + mock 网关零 token 走通埋设→进展→验收后扫描 OVERDUE→看板 + 大纲含窗口 + 三审齐 SSE/留痕；E2E 暴露并钉住上述 bug - 门禁绿：mypy 111 / pytest 228(0 xfailed) / alembic 无漂移；前端 gen:api/lint/tsc/vitest 69/build
2026-06-18 14:21:17 +02:00
parent 68f194a043
commit 5fb7bfb1de
74 changed files with 6529 additions and 126 deletions
--- a/apps/api/tests/fakes_projects.py
+++ b/apps/api/tests/fakes_projects.py
@@ -8,10 +8,19 @@ from __future__ import annotations

 import uuid
 from collections.abc import AsyncIterator
+from contextlib import asynccontextmanager
 from typing import Any

 from pydantic import BaseModel
+from ww_core.domain import ForeshadowLedgerView, OutlineWriteView
 from ww_core.domain.chapter_repo import ChapterDraftView, ChapterView
+from ww_core.domain.foreshadow_state import (
+    ForeshadowStatus,
+    apply_overdue_scan,
+)
+from ww_core.domain.foreshadow_state import (
+    transition as apply_transition,
+)
 from ww_core.domain.project_repo import ProjectCreate, ProjectView
 from ww_core.domain.repositories import DigestView
 from ww_core.domain.review_repo import ReviewView
@@ -172,14 +181,156 @@ class FakeDigestAppendRepo:


 class FakeSession:
-    """最小 fake：记录 commit 次数（验收事务边界断言）。"""
+    """最小 fake：记录 commit/rollback 次数（验收事务 + 端点提交边界断言）。"""

    def __init__(self) -> None:
        self.commits = 0
+        self.rollbacks = 0

    async def commit(self) -> None:
        self.commits += 1

+    async def rollback(self) -> None:
+        self.rollbacks += 1
+
+
+class FakeForeshadowRepo:
+    """实现 `ForeshadowLedgerRepo` Protocol（内存；状态机/进展/扫描复用纯函数）。
+
+    `raise_integrity_on` 模拟重复 code 的 DB 唯一约束冲突（register 抛 IntegrityError）。
+    """
+
+    def __init__(self, *, raise_integrity_on: set[str] | None = None) -> None:
+        self.rows: dict[tuple[uuid.UUID, str], ForeshadowLedgerView] = {}
+        self._raise_integrity_on = raise_integrity_on or set()
+
+    async def register(
+        self,
+        project_id: uuid.UUID,
+        *,
+        code: str,
+        title: str,
+        planted_at: int | None = None,
+        content: str | None = None,
+        expected_close_from: int | None = None,
+        expected_close_to: int | None = None,
+        importance: str | None = None,
+    ) -> ForeshadowLedgerView:
+        if code in self._raise_integrity_on or (project_id, code) in self.rows:
+            from sqlalchemy.exc import IntegrityError
+
+            raise IntegrityError("duplicate code", None, Exception("unique"))
+        view = ForeshadowLedgerView(
+            code=code,
+            title=title,
+            status=ForeshadowStatus.OPEN.value,
+            planted_at=planted_at,
+            content=content,
+            expected_close_from=expected_close_from,
+            expected_close_to=expected_close_to,
+            importance=importance,
+        )
+        self.rows[(project_id, code)] = view
+        return view
+
+    async def get(self, project_id: uuid.UUID, code: str) -> ForeshadowLedgerView | None:
+        return self.rows.get((project_id, code))
+
+    async def list_by_status(
+        self, project_id: uuid.UUID, status: str | None = None
+    ) -> list[ForeshadowLedgerView]:
+        rows = [v for (p, _), v in self.rows.items() if p == project_id]
+        if status is not None:
+            rows = [v for v in rows if v.status == status]
+        return sorted(rows, key=lambda v: v.code)
+
+    async def transition(
+        self, project_id: uuid.UUID, code: str, *, to_status: str
+    ) -> ForeshadowLedgerView:
+        row = self.rows.get((project_id, code))
+        if row is None:
+            raise LookupError(f"foreshadow not found: {code}")
+        new_status = apply_transition(
+            ForeshadowStatus(row.status), ForeshadowStatus(to_status)
+        ).value
+        updated = row.model_copy(update={"status": new_status})
+        self.rows[(project_id, code)] = updated
+        return updated
+
+    async def record_progress(
+        self, project_id: uuid.UUID, code: str, *, entry: dict[str, Any]
+    ) -> ForeshadowLedgerView:
+        row = self.rows.get((project_id, code))
+        if row is None:
+            raise LookupError(f"foreshadow not found: {code}")
+        updated = row.model_copy(update={"progress": [*row.progress, dict(entry)]})
+        self.rows[(project_id, code)] = updated
+        return updated
+
+    async def scan_overdue(
+        self, project_id: uuid.UUID, *, current_chapter: int
+    ) -> list[ForeshadowLedgerView]:
+        changed: list[ForeshadowLedgerView] = []
+        for key, row in list(self.rows.items()):
+            new_status = apply_overdue_scan(
+                ForeshadowStatus(row.status),
+                current_chapter=current_chapter,
+                expected_close_to=row.expected_close_to,
+            ).value
+            if new_status != row.status:
+                updated = row.model_copy(update={"status": new_status})
+                self.rows[key] = updated
+                changed.append(updated)
+        return changed
+
+
+class FakeOutlineWriteRepo:
+    """实现 `OutlineWriteRepo` Protocol（内存；幂等覆盖同 (project_id, chapter_no)）。"""
+
+    def __init__(self) -> None:
+        # (project_id, chapter_no) -> (volume, beats, foreshadow_windows)
+        self.rows: dict[tuple[uuid.UUID, int], tuple[int, list[str], list[dict[str, Any]]]] = {}
+        self.upsert_calls = 0
+
+    async def upsert_chapter(
+        self,
+        project_id: uuid.UUID,
+        *,
+        volume: int,
+        chapter_no: int,
+        beats: list[str],
+        foreshadow_windows: list[dict[str, Any]],
+    ) -> OutlineWriteView:
+        self.upsert_calls += 1
+        windows = [dict(w) for w in foreshadow_windows]
+        self.rows[(project_id, chapter_no)] = (volume, list(beats), windows)
+        return OutlineWriteView(
+            chapter_no=chapter_no,
+            volume=volume,
+            beats=list(beats),
+            foreshadow_windows=windows,
+        )
+
+
+class FakeSessionFactory:
+    """到期扫描的独立 session 工厂替身：`()` → async-CM 产 `FakeSession`。
+
+    记录开了几次 session + 各次 commit，供「扫描自建 session 并提交」断言。
+    """
+
+    def __init__(self) -> None:
+        self.sessions: list[FakeSession] = []
+
+    def __call__(self) -> Any:
+        session = FakeSession()
+        self.sessions.append(session)
+
+        @asynccontextmanager
+        async def _cm() -> AsyncIterator[FakeSession]:
+            yield session
+
+        return _cm()
+

 class FakeReviewGateway:
    """实现审稿/digest 节点最小依赖（`run`）：吐固定结构化 `parsed`，绝不联网。"""
--- a/apps/api/tests/test_foreshadow.py
+++ b/apps/api/tests/test_foreshadow.py
@@ -0,0 +1,203 @@
+"""T3.2 伏笔登记/状态变更端点 + 验收后到期扫描（内存替身，无 DB/无网络）。
+
+覆盖：
+- 登记 201 + 重复 code → 422 VALIDATION 信封；
+- 状态机转移 200 / 非法转移 → 422 VALIDATION / 不存在 → 404；
+- 进展 append；空更新 → 422；
+- 到期扫描纯函数 `run_overdue_scan` 直接 await：埋 expected_close_to < 验收章号的伏笔
+  → 置 OVERDUE、自建 session 提交（**绝不真起后台线程**）。
+"""
+
+from __future__ import annotations
+
+import uuid
+
+import httpx
+import pytest
+from fakes_projects import (
+    FakeForeshadowRepo,
+    FakeSession,
+    FakeSessionFactory,
+)
+from ww_api.services.foreshadow_scan import run_overdue_scan
+from ww_core.domain.foreshadow_state import ForeshadowStatus
+from ww_shared import ErrorCode
+
+
+def _make_client(
+    *, repo: FakeForeshadowRepo | None = None, session: FakeSession | None = None
+) -> tuple[httpx.AsyncClient, FakeForeshadowRepo, FakeSession]:
+    import os
+
+    os.environ.setdefault("CREDENTIAL_ENC_KEY", "x" * 44)
+    from ww_api.main import create_app
+    from ww_api.services.project_deps import get_foreshadow_repo
+    from ww_db import get_session
+
+    repo = repo or FakeForeshadowRepo()
+    session = session or FakeSession()
+
+    app = create_app()
+    app.dependency_overrides[get_foreshadow_repo] = lambda: repo
+    app.dependency_overrides[get_session] = lambda: session
+    transport = httpx.ASGITransport(app=app)
+    client = httpx.AsyncClient(transport=transport, base_url="http://test")
+    return client, repo, session
+
+
+# ---- 登记 ----
+
+
+@pytest.mark.asyncio
+async def test_register_foreshadow_returns_201_open() -> None:
+    client, repo, session = _make_client()
+    pid = uuid.uuid4()
+    async with client:
+        resp = await client.post(
+            f"/projects/{pid}/foreshadow",
+            json={"code": "F1", "title": "神秘信物", "planted_at": 3, "expected_close_to": 10},
+        )
+    assert resp.status_code == 201
+    body = resp.json()
+    assert body["code"] == "F1"
+    assert body["status"] == ForeshadowStatus.OPEN.value
+    assert body["expected_close_to"] == 10
+    assert session.commits == 1
+    assert (pid, "F1") in repo.rows
+
+
+@pytest.mark.asyncio
+async def test_register_duplicate_code_maps_to_422_validation() -> None:
+    repo = FakeForeshadowRepo(raise_integrity_on={"F1"})
+    client, _, session = _make_client(repo=repo)
+    pid = uuid.uuid4()
+    async with client:
+        resp = await client.post(
+            f"/projects/{pid}/foreshadow", json={"code": "F1", "title": "重复"}
+        )
+    assert resp.status_code == 422
+    err = resp.json()["error"]
+    assert err["code"] == ErrorCode.VALIDATION
+    assert err["details"]["reason"] == "duplicate"
+    # 冲突后回滚、不提交。
+    assert session.commits == 0
+    assert session.rollbacks == 1
+
+
+# ---- 状态变更 ----
+
+
+@pytest.mark.asyncio
+async def test_transition_open_to_partial_200() -> None:
+    repo = FakeForeshadowRepo()
+    pid = uuid.uuid4()
+    await repo.register(pid, code="F1", title="t")
+    client, _, session = _make_client(repo=repo)
+    async with client:
+        resp = await client.patch(f"/projects/{pid}/foreshadow/F1", json={"to_status": "PARTIAL"})
+    assert resp.status_code == 200
+    assert resp.json()["status"] == "PARTIAL"
+    assert session.commits == 1
+
+
+@pytest.mark.asyncio
+async def test_invalid_transition_maps_to_422_validation() -> None:
+    repo = FakeForeshadowRepo()
+    pid = uuid.uuid4()
+    await repo.register(pid, code="F1", title="t")
+    await repo.transition(pid, "F1", to_status="CLOSED")  # 先到终态
+    client, _, session = _make_client(repo=repo)
+    async with client:
+        resp = await client.patch(
+            f"/projects/{pid}/foreshadow/F1",
+            json={"to_status": "PARTIAL"},  # CLOSED→PARTIAL 非法
+        )
+    assert resp.status_code == 422
+    err = resp.json()["error"]
+    assert err["code"] == ErrorCode.VALIDATION
+    assert err["details"]["reason"] == "invalid_transition"
+    assert session.rollbacks == 1
+
+
+@pytest.mark.asyncio
+async def test_transition_unknown_code_404() -> None:
+    client, _, _ = _make_client()
+    pid = uuid.uuid4()
+    async with client:
+        resp = await client.patch(f"/projects/{pid}/foreshadow/NOPE", json={"to_status": "PARTIAL"})
+    assert resp.status_code == 404
+    assert resp.json()["error"]["code"] == ErrorCode.NOT_FOUND
+
+
+@pytest.mark.asyncio
+async def test_record_progress_appends() -> None:
+    repo = FakeForeshadowRepo()
+    pid = uuid.uuid4()
+    await repo.register(pid, code="F1", title="t")
+    client, _, session = _make_client(repo=repo)
+    async with client:
+        resp = await client.patch(
+            f"/projects/{pid}/foreshadow/F1",
+            json={"progress_entry": {"chapter_no": 5, "note": "首次照应"}},
+        )
+    assert resp.status_code == 200
+    assert resp.json()["progress"][0]["note"] == "首次照应"
+    assert session.commits == 1
+
+
+@pytest.mark.asyncio
+async def test_empty_update_maps_to_422() -> None:
+    repo = FakeForeshadowRepo()
+    pid = uuid.uuid4()
+    await repo.register(pid, code="F1", title="t")
+    client, _, _ = _make_client(repo=repo)
+    async with client:
+        resp = await client.patch(f"/projects/{pid}/foreshadow/F1", json={})
+    assert resp.status_code == 422
+    assert resp.json()["error"]["details"]["reason"] == "empty_update"
+
+
+# ---- 验收后到期扫描（纯函数直接 await，不起后台线程）----
+
+
+@pytest.mark.asyncio
+async def test_run_overdue_scan_marks_overdue_and_commits() -> None:
+    # Arrange：一条 expected_close_to=5 的伏笔，验收章号 7 > 5 → 应置 OVERDUE。
+    repo = FakeForeshadowRepo()
+    pid = uuid.uuid4()
+    await repo.register(pid, code="F1", title="逾期", expected_close_to=5)
+    await repo.register(pid, code="F2", title="窗口内", expected_close_to=9)
+    factory = FakeSessionFactory()
+
+    # Act：经 repo_factory 缝注入 fake 账本 repo（不联网/不真起后台线程）。
+    count = await run_overdue_scan(
+        factory,
+        project_id=pid,
+        chapter_no=7,
+        request_id="req-1",
+        repo_factory=lambda _session: repo,
+    )
+
+    # Assert
+    assert count == 1
+    assert repo.rows[(pid, "F1")].status == ForeshadowStatus.OVERDUE.value
+    assert repo.rows[(pid, "F2")].status == ForeshadowStatus.OPEN.value
+    # 自建 session 且有变更 → 提交一次。
+    assert len(factory.sessions) == 1
+    assert factory.sessions[0].commits == 1
+
+
+@pytest.mark.asyncio
+async def test_run_overdue_scan_no_change_skips_commit() -> None:
+    repo = FakeForeshadowRepo()
+    pid = uuid.uuid4()
+    await repo.register(pid, code="F1", title="窗口内", expected_close_to=9)
+    factory = FakeSessionFactory()
+
+    count = await run_overdue_scan(
+        factory, project_id=pid, chapter_no=3, repo_factory=lambda _session: repo
+    )
+
+    assert count == 0
+    # 空扫描不提交。
+    assert factory.sessions[0].commits == 0
--- a/apps/api/tests/test_outline.py
+++ b/apps/api/tests/test_outline.py
@@ -0,0 +1,216 @@
+"""T3.5 端点测试：大纲生成 + 持久化 + 伏笔看板（内存替身，无 DB/无网络）。
+
+覆盖：
+- POST /outline：mock 网关产 `OutlineResult` → 逐章 upsert（含 foreshadow_windows）→ 端点 commit；
+- 幂等：同 (project_id, chapter_no) 再生成覆盖；
+- 项目不存在 → 404；无凭据 → LLM_UNAVAILABLE（503）；
+- GET /foreshadow?status=：按状态过滤；非法 status → 422 VALIDATION。
+"""
+
+from __future__ import annotations
+
+import os
+import uuid
+
+import httpx
+import pytest
+from fakes_projects import (
+    FakeForeshadowRepo,
+    FakeOutlineWriteRepo,
+    FakeProjectRepo,
+    FakeReviewGateway,
+    FakeSession,
+)
+from test_projects import _empty_memory_repos
+from ww_agents import ForeshadowWindow, OutlineChapter, OutlineResult
+from ww_core.domain.project_repo import ProjectCreate
+from ww_shared import AppError, ErrorCode
+
+
+def _outline_result() -> OutlineResult:
+    return OutlineResult(
+        chapters=[
+            OutlineChapter(
+                no=1,
+                beats=["开篇引入主角", "埋下信物伏笔"],
+                foreshadow_windows=[
+                    ForeshadowWindow(code="F1", plant_chapter=1, expected_close_to=10)
+                ],
+            ),
+            OutlineChapter(no=2, beats=["冲突升级"], foreshadow_windows=[]),
+        ]
+    )
+
+
+def _make_client(
+    *,
+    project_repo: FakeProjectRepo | None = None,
+    foreshadow_repo: FakeForeshadowRepo | None = None,
+    outline_repo: FakeOutlineWriteRepo | None = None,
+    gateway: FakeReviewGateway | None = None,
+    session: FakeSession | None = None,
+) -> tuple[httpx.AsyncClient, FakeOutlineWriteRepo, FakeSession]:
+    os.environ.setdefault("CREDENTIAL_ENC_KEY", "x" * 44)
+    from ww_api.main import create_app
+    from ww_api.services.project_deps import (
+        get_foreshadow_repo,
+        get_memory_repos,
+        get_outline_gateway,
+        get_outline_write_repo,
+        get_project_repo,
+    )
+    from ww_db import get_session
+
+    project_repo = project_repo or FakeProjectRepo()
+    foreshadow_repo = foreshadow_repo or FakeForeshadowRepo()
+    outline_repo = outline_repo or FakeOutlineWriteRepo()
+    gateway = gateway or FakeReviewGateway(parsed=_outline_result())
+    session = session or FakeSession()
+
+    app = create_app()
+    app.dependency_overrides[get_project_repo] = lambda: project_repo
+    app.dependency_overrides[get_foreshadow_repo] = lambda: foreshadow_repo
+    app.dependency_overrides[get_memory_repos] = _empty_memory_repos
+    app.dependency_overrides[get_outline_write_repo] = lambda: outline_repo
+    app.dependency_overrides[get_session] = lambda: session
+    app.dependency_overrides[get_outline_gateway] = lambda: gateway
+
+    transport = httpx.ASGITransport(app=app, raise_app_exceptions=False)
+    client = httpx.AsyncClient(transport=transport, base_url="http://test")
+    return client, outline_repo, session
+
+
+async def _seed_project(repo: FakeProjectRepo) -> uuid.UUID:
+    view = await repo.create(uuid.UUID(int=1), ProjectCreate(title="测试作品", genre="玄幻"))
+    return uuid.UUID(str(view.id))
+
+
+# ---- 大纲生成 ----
+
+
+@pytest.mark.asyncio
+async def test_generate_outline_upserts_chapters_and_commits() -> None:
+    project_repo = FakeProjectRepo()
+    pid = await _seed_project(project_repo)
+    client, outline_repo, session = _make_client(project_repo=project_repo)
+
+    async with client:
+        resp = await client.post(f"/projects/{pid}/outline", json={"volume": 1})
+
+    assert resp.status_code == 200
+    body = resp.json()
+    assert [c["no"] for c in body["chapters"]] == [1, 2]
+    ch1 = body["chapters"][0]
+    assert ch1["beats"] == ["开篇引入主角", "埋下信物伏笔"]
+    assert ch1["foreshadow_windows"][0]["code"] == "F1"
+    assert ch1["foreshadow_windows"][0]["expected_close_to"] == 10
+    # 逐章 upsert（2 章）+ 端点末尾一次 commit。
+    assert outline_repo.upsert_calls == 2
+    assert (pid, 1) in outline_repo.rows
+    assert outline_repo.rows[(pid, 1)][1] == ["开篇引入主角", "埋下信物伏笔"]
+    assert session.commits == 1
+
+
+@pytest.mark.asyncio
+async def test_generate_outline_is_idempotent_overwrites_same_chapter() -> None:
+    project_repo = FakeProjectRepo()
+    pid = await _seed_project(project_repo)
+    outline_repo = FakeOutlineWriteRepo()
+    client, _, _ = _make_client(project_repo=project_repo, outline_repo=outline_repo)
+
+    async with client:
+        await client.post(f"/projects/{pid}/outline", json={"volume": 1})
+        await client.post(f"/projects/{pid}/outline", json={"volume": 1})
+
+    # 同 (project_id, chapter_no) 覆盖，不堆叠 → 仍只 2 行。
+    assert len(outline_repo.rows) == 2
+
+
+@pytest.mark.asyncio
+async def test_generate_outline_unknown_project_404() -> None:
+    client, _, _ = _make_client()
+    async with client:
+        resp = await client.post(f"/projects/{uuid.uuid4()}/outline", json={})
+    assert resp.status_code == 404
+    assert resp.json()["error"]["code"] == ErrorCode.NOT_FOUND
+
+
+@pytest.mark.asyncio
+async def test_generate_outline_without_credentials_maps_to_llm_unavailable() -> None:
+    # 无凭据时 `build_gateway_for_tier` 抛 LLM_UNAVAILABLE（503），在网关 dep 解析阶段发生。
+    project_repo = FakeProjectRepo()
+    pid = await _seed_project(project_repo)
+    session = FakeSession()
+    os.environ.setdefault("CREDENTIAL_ENC_KEY", "x" * 44)
+    from ww_api.main import create_app
+    from ww_api.services.project_deps import (
+        get_foreshadow_repo,
+        get_memory_repos,
+        get_outline_gateway,
+        get_outline_write_repo,
+        get_project_repo,
+    )
+    from ww_db import get_session
+
+    async def _no_creds() -> object:
+        raise AppError(ErrorCode.LLM_UNAVAILABLE, "未配置凭据", {"provider": "deepseek"})
+
+    app = create_app()
+    app.dependency_overrides[get_project_repo] = lambda: project_repo
+    app.dependency_overrides[get_foreshadow_repo] = lambda: FakeForeshadowRepo()
+    app.dependency_overrides[get_memory_repos] = _empty_memory_repos
+    app.dependency_overrides[get_outline_write_repo] = lambda: FakeOutlineWriteRepo()
+    app.dependency_overrides[get_session] = lambda: session
+    app.dependency_overrides[get_outline_gateway] = _no_creds
+    transport = httpx.ASGITransport(app=app, raise_app_exceptions=False)
+    async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
+        resp = await client.post(f"/projects/{pid}/outline", json={})
+
+    assert resp.status_code == 503
+    assert resp.json()["error"]["code"] == ErrorCode.LLM_UNAVAILABLE
+    # 网关阶段失败 → 未生成、未提交。
+    assert session.commits == 0
+
+
+@pytest.mark.asyncio
+async def test_generate_outline_upper_error_propagates() -> None:
+    project_repo = FakeProjectRepo()
+    pid = await _seed_project(project_repo)
+    gateway = FakeReviewGateway(error=AppError(ErrorCode.LLM_UNAVAILABLE, "boom"))
+    client, _, session = _make_client(project_repo=project_repo, gateway=gateway)
+
+    async with client:
+        resp = await client.post(f"/projects/{pid}/outline", json={})
+
+    assert resp.status_code == 503
+    assert session.commits == 0
+
+
+# ---- 伏笔看板 ----
+
+
+@pytest.mark.asyncio
+async def test_foreshadow_board_filters_by_status() -> None:
+    repo = FakeForeshadowRepo()
+    pid = uuid.uuid4()
+    await repo.register(pid, code="F1", title="开放伏笔")
+    await repo.register(pid, code="F2", title="部分回收")
+    await repo.transition(pid, "F2", to_status="PARTIAL")
+    from ww_api.main import create_app
+    from ww_api.services.project_deps import get_foreshadow_repo
+
+    os.environ.setdefault("CREDENTIAL_ENC_KEY", "x" * 44)
+    app = create_app()
+    app.dependency_overrides[get_foreshadow_repo] = lambda: repo
+    transport = httpx.ASGITransport(app=app, raise_app_exceptions=False)
+    async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
+        all_resp = await client.get(f"/projects/{pid}/foreshadow")
+        open_resp = await client.get(f"/projects/{pid}/foreshadow", params={"status": "OPEN"})
+        bad_resp = await client.get(f"/projects/{pid}/foreshadow", params={"status": "NOPE"})
+
+    assert {f["code"] for f in all_resp.json()["foreshadow"]} == {"F1", "F2"}
+    open_codes = [f["code"] for f in open_resp.json()["foreshadow"]]
+    assert open_codes == ["F1"]
+    assert bad_resp.status_code == 422
+    assert bad_resp.json()["error"]["code"] == ErrorCode.VALIDATION
+    assert bad_resp.json()["error"]["details"]["reason"] == "invalid_status"
--- a/apps/api/tests/test_outline_context.py
+++ b/apps/api/tests/test_outline_context.py
@@ -0,0 +1,63 @@
+"""T3.5 大纲注入上下文组装单测（确定性纯函数；ARCH §5.4）。
+
+断言：四源（设定/伏笔/人物/世界观）都进文本、排序确定（同输入同输出）、空源不炸。
+"""
+
+from __future__ import annotations
+
+from ww_api.services.outline_context import build_outline_context
+from ww_core.domain import ForeshadowLedgerView
+from ww_core.domain.project_repo import ProjectView
+from ww_core.domain.repositories import CharacterView, WorldEntityView
+
+
+def _project() -> ProjectView:
+    import uuid
+
+    return ProjectView(
+        id=uuid.UUID(int=1),
+        title="逆天剑帝",
+        genre="玄幻",
+        logline="少年逆袭",
+        selling_points=["爽点密集", "升级流"],
+    )
+
+
+def test_build_context_includes_all_four_sources() -> None:
+    text = build_outline_context(
+        project=_project(),
+        foreshadow=[
+            ForeshadowLedgerView(
+                code="F1", title="神秘信物", status="OPEN", planted_at=3, expected_close_to=10
+            )
+        ],
+        characters=[CharacterView(name="主角", role="protagonist", motive="复仇")],
+        world_entities=[WorldEntityView(type="location", name="剑冢")],
+    )
+    assert "逆天剑帝" in text
+    assert "F1" in text and "神秘信物" in text
+    assert "回收窗口 ?-10" in text
+    assert "主角" in text
+    assert "剑冢" in text
+
+
+def test_build_context_is_deterministic_and_sorted() -> None:
+    project = _project()
+    fs = [
+        ForeshadowLedgerView(code="F2", title="b", status="OPEN"),
+        ForeshadowLedgerView(code="F1", title="a", status="OPEN"),
+    ]
+    a = build_outline_context(project=project, foreshadow=fs, characters=[], world_entities=[])
+    b = build_outline_context(
+        project=project, foreshadow=list(reversed(fs)), characters=[], world_entities=[]
+    )
+    assert a == b
+    # F1 排在 F2 前（按 code 升序）。
+    assert a.index("[F1]") < a.index("[F2]")
+
+
+def test_build_context_handles_empty_sources() -> None:
+    text = build_outline_context(
+        project=_project(), foreshadow=[], characters=[], world_entities=[]
+    )
+    assert "（无）" in text
--- a/apps/api/tests/test_review_accept.py
+++ b/apps/api/tests/test_review_accept.py
@@ -17,6 +17,7 @@ from fakes_projects import (
    FakeReviewGateway,
    FakeReviewRepo,
    FakeSession,
+    FakeSessionFactory,
 )
 from test_projects import _empty_memory_repos
 from ww_agents import ContinuityReview
@@ -50,6 +51,7 @@ def _make_client(
        get_memory_repos,
        get_review_gateway,
        get_review_repo,
+        get_session_factory,
    )
    from ww_db import get_session

@@ -68,6 +70,7 @@ def _make_client(
    app.dependency_overrides[get_review_gateway] = lambda: review_gateway
    app.dependency_overrides[get_digest_gateway] = lambda: digest_gateway
    app.dependency_overrides[get_session] = lambda: session
+    app.dependency_overrides[get_session_factory] = lambda: FakeSessionFactory()
    transport = httpx.ASGITransport(app=app)
    client = httpx.AsyncClient(transport=transport, base_url="http://test")
    return client, chapter_repo, review_repo, digest_repo, session
--- a/apps/api/ww_api/main.py
+++ b/apps/api/ww_api/main.py
@@ -12,7 +12,14 @@ from ww_shared import AppError, ErrorBody, ErrorEnvelope

 from ww_api.logging_config import configure_logging, get_logger
 from ww_api.middleware import request_id_middleware
-from ww_api.routers import health, jobs, projects, settings_providers
+from ww_api.routers import (
+    foreshadow,
+    health,
+    jobs,
+    outline,
+    projects,
+    settings_providers,
+)
 from ww_api.services.project_deps import seed_stub_user

 configure_logging()
@@ -48,6 +55,8 @@ def create_app() -> FastAPI:
    app.include_router(health.router)
    app.include_router(jobs.router)
    app.include_router(projects.router)
+    app.include_router(foreshadow.router)
+    app.include_router(outline.router)
    app.include_router(settings_providers.router)
    return app

--- a/apps/api/ww_api/routers/foreshadow.py
+++ b/apps/api/ww_api/routers/foreshadow.py
@@ -0,0 +1,159 @@
+"""伏笔登记 / 状态变更端点（C3 扩 / ARCH §6.2, §7.2；不变量 #3）。
+
+- POST  /projects/:id/foreshadow          作者显式登记一条伏笔（status=OPEN）。
+- PATCH /projects/:id/foreshadow/:code     状态机转移 和/或 追加进展。
+
+登记/改状态是**作者显式动作**（不变量 #3：伏笔入库不经 AI 静默写库；验收后到期扫描
+是确定性纯函数置位，见 `services/foreshadow_scan.py`）。
+
+提交边界：`ForeshadowLedgerRepo` 写方法只 `flush()`，端点写后 `await session.commit()`。
+
+**T3.5 续接点**：本 router 是 foreshadow 端点的归属处。T3.5 的看板查询
+`GET /projects/:id/foreshadow?status=` 直接加到本 router（调 `repo.list_by_status`）；
+大纲 `POST /projects/:id/outline` 与伏笔无关，建议落独立 `routers/outline.py`
+（或 projects router），不混进本文件。
+"""
+
+from __future__ import annotations
+
+import uuid
+from typing import Annotated
+
+from fastapi import APIRouter, Depends, Request
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.ext.asyncio import AsyncSession
+from ww_core.domain import ForeshadowLedgerRepo, ForeshadowLedgerView
+from ww_core.domain.foreshadow_state import ForeshadowStatus, InvalidTransition
+from ww_db import get_session
+from ww_shared import AppError, ErrorCode
+
+from ww_api.logging_config import get_logger
+from ww_api.schemas.foreshadow import (
+    ForeshadowBoardResponse,
+    ForeshadowRegisterRequest,
+    ForeshadowTransitionRequest,
+    ForeshadowView,
+)
+from ww_api.services.project_deps import get_foreshadow_repo
+
+log = get_logger("ww.api.foreshadow")
+
+router = APIRouter(prefix="/projects", tags=["foreshadow"])
+
+ForeshadowRepoDep = Annotated[ForeshadowLedgerRepo, Depends(get_foreshadow_repo)]
+SessionDep = Annotated[AsyncSession, Depends(get_session)]
+
+
+def _to_view(v: ForeshadowLedgerView) -> ForeshadowView:
+    # ForeshadowLedgerView 与 ForeshadowView 字段同名，逐字段映射（snake_case 契约）。
+    return ForeshadowView.model_validate(v, from_attributes=True)
+
+
+@router.post("/{project_id}/foreshadow", status_code=201)
+async def register_foreshadow(
+    project_id: uuid.UUID,
+    body: ForeshadowRegisterRequest,
+    request: Request,
+    repo: ForeshadowRepoDep,
+    session: SessionDep,
+) -> ForeshadowView:
+    """登记一条伏笔（status=OPEN）。重复 `code` → DB 唯一约束冲突 → VALIDATION 信封。"""
+    request_id = getattr(request.state, "request_id", None)
+    try:
+        view = await repo.register(
+            project_id,
+            code=body.code,
+            title=body.title,
+            planted_at=body.planted_at,
+            content=body.content,
+            expected_close_from=body.expected_close_from,
+            expected_close_to=body.expected_close_to,
+            importance=body.importance,
+        )
+        await session.commit()
+    except IntegrityError as exc:
+        # `(project_id, code)` 唯一约束冲突（register 仅 INSERT、不 upsert，见 foreshadow_repo）。
+        await session.rollback()
+        raise AppError(
+            ErrorCode.VALIDATION,
+            f"伏笔代号已存在：{body.code}",
+            {"field": "code", "code": body.code, "reason": "duplicate"},
+        ) from exc
+    log.info(
+        "foreshadow_registered",
+        project_id=str(project_id),
+        request_id=request_id,
+        code=body.code,
+    )
+    return _to_view(view)
+
+
+@router.get("/{project_id}/foreshadow")
+async def list_foreshadow(
+    project_id: uuid.UUID,
+    repo: ForeshadowRepoDep,
+    status: str | None = None,
+) -> ForeshadowBoardResponse:
+    """伏笔看板：按 `status` 过滤（缺省=全部），按 code 升序。
+
+    `status` 非法（不在 OPEN/PARTIAL/CLOSED/OVERDUE）→ VALIDATION 信封。四泳道前端
+    据 `status` 分组；OVERDUE 泳道 + 逾期标记用 `expected_close_to`（看板字段已齐）。
+    """
+    if status is not None and status not in {s.value for s in ForeshadowStatus}:
+        raise AppError(
+            ErrorCode.VALIDATION,
+            f"非法状态过滤：{status}",
+            {"field": "status", "reason": "invalid_status"},
+        )
+    views = await repo.list_by_status(project_id, status)
+    return ForeshadowBoardResponse(foreshadow=[_to_view(v) for v in views])
+
+
+@router.patch("/{project_id}/foreshadow/{code}")
+async def update_foreshadow(
+    project_id: uuid.UUID,
+    code: str,
+    body: ForeshadowTransitionRequest,
+    request: Request,
+    repo: ForeshadowRepoDep,
+    session: SessionDep,
+) -> ForeshadowView:
+    """状态机转移 和/或 追加进展。非法转移 → VALIDATION 信封；不存在 → NOT_FOUND。
+
+    `to_status` 与 `progress_entry` 皆可选；两者都缺 → VALIDATION（无操作）。先转移、后追加。
+    """
+    request_id = getattr(request.state, "request_id", None)
+    if body.to_status is None and body.progress_entry is None:
+        raise AppError(
+            ErrorCode.VALIDATION,
+            "至少提供 `to_status` 或 `progress_entry` 之一",
+            {"reason": "empty_update"},
+        )
+
+    view: ForeshadowLedgerView
+    try:
+        if body.to_status is not None:
+            view = await repo.transition(project_id, code, to_status=body.to_status)
+        if body.progress_entry is not None:
+            view = await repo.record_progress(project_id, code, entry=body.progress_entry)
+        await session.commit()
+    except InvalidTransition as exc:
+        await session.rollback()
+        raise AppError(
+            ErrorCode.VALIDATION,
+            str(exc),
+            {"field": "to_status", "code": code, "reason": "invalid_transition"},
+        ) from exc
+    except LookupError as exc:
+        await session.rollback()
+        raise AppError(ErrorCode.NOT_FOUND, f"foreshadow not found: {code}") from exc
+
+    log.info(
+        "foreshadow_updated",
+        project_id=str(project_id),
+        request_id=request_id,
+        code=code,
+        to_status=body.to_status,
+        has_progress=body.progress_entry is not None,
+    )
+    return _to_view(view)
--- a/apps/api/ww_api/routers/outline.py
+++ b/apps/api/ww_api/routers/outline.py
@@ -0,0 +1,135 @@
+"""大纲生成端点（C3 扩 / ARCH §5.4 outliner / §7.2 POST /outline；不变量 #2/#3）。
+
+POST /projects/:id/outline：作者显式发起大纲生成 + 持久化。
+
+流程：组确定性上下文（设定 + 已登记伏笔 + 人物 + 世界观）→ `run_outline`（analyst 网关，
+结构化 `OutlineResult`）→ 逐章 upsert `outline` 表 → 端点末尾一次 `commit()`。
+
+提交边界：网关 ledger 只 flush（run_outline 产 1 条 usage）、`OutlineWriteRepo.upsert_chapter`
+只 flush → 端点末尾 `await session.commit()`（否则 usage_ledger + outline 行静默丢失，见 gotcha）。
+
+不变量 #2：经 `build_gateway_for_tier(..., "analyst")` 注入；outliner_spec 只声明档位不传 model。
+不变量 #3：outliner `writes=["outline"]` 经此**作者发起**端点落地，非 AI 静默写其它表；
+run_outline 节点本身只读不写库。无凭据 → `LLM_UNAVAILABLE`（友好提示，仿 draft/review）。
+"""
+
+from __future__ import annotations
+
+import uuid
+from typing import Annotated
+
+from fastapi import APIRouter, Depends, Request
+from sqlalchemy.ext.asyncio import AsyncSession
+from ww_agents import outliner_spec
+from ww_core.domain import ForeshadowLedgerRepo, OutlineWriteRepo, ProjectRepo
+from ww_core.domain.repositories import MemoryRepos
+from ww_core.orchestrator import run_outline
+from ww_db import get_session
+from ww_llm_gateway import Gateway
+from ww_shared import AppError, ErrorCode
+
+from ww_api.logging_config import get_logger
+from ww_api.schemas.outline import (
+    ForeshadowWindowView,
+    OutlineChapterView,
+    OutlineGenerateRequest,
+    OutlineResponse,
+)
+from ww_api.services.credentials import STUB_OWNER_ID
+from ww_api.services.outline_context import build_outline_context
+from ww_api.services.project_deps import (
+    get_foreshadow_repo,
+    get_memory_repos,
+    get_outline_gateway,
+    get_outline_write_repo,
+    get_project_repo,
+)
+
+log = get_logger("ww.api.outline")
+
+router = APIRouter(prefix="/projects", tags=["outline"])
+
+ProjectRepoDep = Annotated[ProjectRepo, Depends(get_project_repo)]
+ForeshadowRepoDep = Annotated[ForeshadowLedgerRepo, Depends(get_foreshadow_repo)]
+MemoryReposDep = Annotated[MemoryRepos, Depends(get_memory_repos)]
+OutlineWriteRepoDep = Annotated[OutlineWriteRepo, Depends(get_outline_write_repo)]
+OutlineGatewayDep = Annotated[Gateway, Depends(get_outline_gateway)]
+SessionDep = Annotated[AsyncSession, Depends(get_session)]
+
+
+@router.post("/{project_id}/outline")
+async def generate_outline(
+    project_id: uuid.UUID,
+    body: OutlineGenerateRequest,
+    request: Request,
+    project_repo: ProjectRepoDep,
+    foreshadow_repo: ForeshadowRepoDep,
+    memory_repos: MemoryReposDep,
+    outline_repo: OutlineWriteRepoDep,
+    gateway: OutlineGatewayDep,
+    session: SessionDep,
+) -> OutlineResponse:
+    """生成大纲并逐章持久化。无凭据 → LLM_UNAVAILABLE；项目不存在 → NOT_FOUND。"""
+    request_id = getattr(request.state, "request_id", None)
+
+    project = await project_repo.get(STUB_OWNER_ID, project_id)
+    if project is None:
+        raise AppError(ErrorCode.NOT_FOUND, f"project not found: {project_id}")
+
+    foreshadow = await foreshadow_repo.list_by_status(project_id, None)
+    characters = await memory_repos.character.list_for_project(project_id)
+    world_entities = await memory_repos.world_entity.list_for_project(project_id)
+    context = build_outline_context(
+        project=project,
+        foreshadow=foreshadow,
+        characters=characters,
+        world_entities=world_entities,
+    )
+
+    log.info(
+        "outline_generate_start",
+        project_id=str(project_id),
+        request_id=request_id,
+        volume=body.volume,
+        context_len=len(context),
+        foreshadow_count=len(foreshadow),
+    )
+
+    # run_outline 产结构化大纲（analyst 网关；网关失败上抛，无凭据 → LLM_UNAVAILABLE）。
+    result = await run_outline(
+        outliner_spec,
+        context=context,
+        gateway=gateway,
+        user_id=STUB_OWNER_ID,
+        project_id=project_id,
+    )
+
+    chapters: list[OutlineChapterView] = []
+    for chapter in result.chapters:
+        windows = [w.model_dump() for w in chapter.foreshadow_windows]
+        await outline_repo.upsert_chapter(
+            project_id,
+            volume=body.volume,
+            chapter_no=chapter.no,
+            beats=chapter.beats,
+            foreshadow_windows=windows,
+        )
+        chapters.append(
+            OutlineChapterView(
+                no=chapter.no,
+                volume=body.volume,
+                beats=list(chapter.beats),
+                foreshadow_windows=[ForeshadowWindowView(**w) for w in windows],
+            )
+        )
+
+    # 提交边界：网关 ledger + outline upsert 均只 flush → 端点末尾一次 commit。
+    await session.commit()
+
+    log.info(
+        "outline_generate_done",
+        project_id=str(project_id),
+        request_id=request_id,
+        chapter_count=len(chapters),
+    )
+    return OutlineResponse(chapters=chapters)
--- a/apps/api/ww_api/routers/projects.py
+++ b/apps/api/ww_api/routers/projects.py
@@ -17,7 +17,7 @@ import uuid
 from collections.abc import AsyncIterator
 from typing import Annotated

-from fastapi import APIRouter, Depends, Request
+from fastapi import APIRouter, BackgroundTasks, Depends, Request
 from fastapi.responses import StreamingResponse
 from sqlalchemy.ext.asyncio import AsyncSession
 from ww_core.domain.chapter_repo import ChapterRepo
@@ -59,6 +59,7 @@ from ww_api.services.accept_service import (
 )
 from ww_api.services.credentials import STUB_OWNER_ID
 from ww_api.services.digest_extraction import extract_digest_facts
+from ww_api.services.foreshadow_scan import SessionFactory, run_overdue_scan
 from ww_api.services.project_deps import (
    get_chapter_repo,
    get_digest_append_repo,
@@ -67,6 +68,7 @@ from ww_api.services.project_deps import (
    get_project_repo,
    get_review_gateway,
    get_review_repo,
+    get_session_factory,
    get_writer_gateway,
 )

@@ -302,14 +304,23 @@ async def accept_chapter(
    chapter_no: int,
    body: AcceptRequest,
    request: Request,
+    background_tasks: BackgroundTasks,
    chapter_repo: ChapterRepoDep,
    digest_repo: DigestRepoDep,
    review_repo: ReviewRepoDep,
    gateway: DigestGatewayDep,
    session: Annotated[AsyncSession, Depends(get_session)],
+    session_factory: Annotated[SessionFactory, Depends(get_session_factory)],
 ) -> AcceptResponse:
    """验收事务 + 冲突 gate（§5.5）：gate（事务前）→ 终稿提炼 digest（事务外，R2）→
-    单原子事务（晋升 + digest + 裁决留痕）→ 一次 commit。
+    单原子事务（晋升 + digest + 裁决留痕）→ 一次 commit → 登记**验收后伏笔到期扫描**
+    BackgroundTask（M3-b/d，§6.2）。
+
+    到期扫描接 §5.5 步骤 3 的 `TODO(M3)` 占位：验收提交成功**后**，把
+    `current_ch > expected_close_to AND status≠CLOSED` 的伏笔确定性置 OVERDUE。
+    伏笔登记/回收（PARTIAL/CLOSED）的「采纳建议」经作者经 foreshadow 端点显式确认，
+    不在验收事务里 AI 静默改库（不变量 #3）。**§7.4 持久性局限**：BackgroundTask 进程内
+    跑、重启丢失——原型可接受（见 `services/foreshadow_scan.py`，不引入 jobs 表）。
    """
    request_id = getattr(request.state, "request_id", None)
    # R3：审稿真相从领域表重读（最近一条 chapter_reviews），不依赖 checkpoint。
@@ -350,6 +361,17 @@ async def accept_chapter(
        latest_review=latest_review,
        decisions=body.decisions,
    )
+
+    # 验收**提交成功后**登记伏笔到期扫描 BackgroundTask（M3-b/d）。current_chapter=刚验收章号；
+    # 任务在请求 session 关闭后跑，故 run_overdue_scan 自建新 session 并 commit（§7.4 局限可接受）。
+    background_tasks.add_task(
+        run_overdue_scan,
+        session_factory,
+        project_id=project_id,
+        chapter_no=chapter_no,
+        request_id=request_id,
+    )
+
    return AcceptResponse(
        project_id=project_id,
        chapter_no=chapter_no,
--- a/apps/api/ww_api/schemas/foreshadow.py
+++ b/apps/api/ww_api/schemas/foreshadow.py
@@ -0,0 +1,66 @@
+"""伏笔登记 / 状态变更端点的请求/响应 schema（C3 扩 / ARCH §6.2, §7.2）。
+
+snake_case；前端经 OpenAPI 生成 TS 类型消费。改字段 → 前端必须 `pnpm gen:api`。
+登记是**作者显式动作**（不变量 #3：伏笔入库不经 AI 静默写库），到期扫描是验收后的
+确定性纯函数置位（M3-d），二者都不在审稿/写章流水线里。
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from pydantic import BaseModel, Field
+
+
+class ForeshadowRegisterRequest(BaseModel):
+    """POST /projects/:id/foreshadow：作者显式登记一条伏笔（status 落 OPEN）。"""
+
+    code: str = Field(min_length=1, description="伏笔代号，`(project_id, code)` 唯一")
+    title: str = Field(min_length=1, description="伏笔标题/一句话描述")
+    planted_at: int | None = Field(default=None, description="埋设章号")
+    content: str | None = Field(default=None, description="伏笔正文/线索")
+    expected_close_from: int | None = Field(default=None, description="预期回收窗口起始章")
+    expected_close_to: int | None = Field(
+        default=None, description="预期回收窗口结束章（到期判据用）"
+    )
+    importance: str | None = Field(default=None, description="重要度（自由文本，看板用）")
+
+
+class ForeshadowTransitionRequest(BaseModel):
+    """PATCH /projects/:id/foreshadow/:code：状态机转移 和/或 追加一条进展。
+
+    两字段皆可选：`to_status` 走状态机（非法 → VALIDATION 信封）；`progress_entry`
+    append-only 追加到 progress JSONB。二者可同时给（先转移、后追加进展）。
+    """
+
+    to_status: str | None = Field(
+        default=None, description="目标状态（OPEN/PARTIAL/CLOSED/OVERDUE）"
+    )
+    progress_entry: dict[str, Any] | None = Field(
+        default=None, description="追加一条进展记录（append-only，不覆盖历史）"
+    )
+
+
+class ForeshadowView(BaseModel):
+    """伏笔账本视图（登记/状态变更/看板共用；snake_case）。形对齐 `ForeshadowLedgerView`。"""
+
+    code: str
+    title: str
+    status: str
+    planted_at: int | None = None
+    content: str | None = None
+    expected_close_from: int | None = None
+    expected_close_to: int | None = None
+    importance: str | None = None
+    links: list[dict[str, Any]] = Field(default_factory=list)
+    progress: list[dict[str, Any]] = Field(default_factory=list)
+
+
+class ForeshadowBoardResponse(BaseModel):
+    """GET /projects/:id/foreshadow?status=：伏笔看板（四泳道 + OVERDUE 字段齐）。
+
+    `status` 缺省返回全部；按 `code` 升序（repo `list_by_status` 已排序）。前端按
+    `status` 分四泳道（OPEN/PARTIAL/CLOSED/OVERDUE），用 `expected_close_to` 标逾期。
+    """
+
+    foreshadow: list[ForeshadowView] = Field(default_factory=list)
--- a/apps/api/ww_api/schemas/outline.py
+++ b/apps/api/ww_api/schemas/outline.py
@@ -0,0 +1,43 @@
+"""大纲生成端点的请求/响应 schema（C3 扩 / ARCH §5.4, §7.2）。
+
+snake_case；前端经 OpenAPI 生成 TS 类型消费（改字段 → 前端 `pnpm gen:api`）。
+大纲生成是**作者显式动作**（不变量 #3：outliner `writes=["outline"]` 声明经此端点落地，
+非 AI 静默写其它表）。窗口字段供前端 T3.6 渲染伏笔窗口徽标。
+"""
+
+from __future__ import annotations
+
+from pydantic import BaseModel, Field
+
+
+class OutlineGenerateRequest(BaseModel):
+    """POST /projects/:id/outline：触发大纲生成 + 持久化。
+
+    M3 简单分卷：`volume` 缺省=1（schema 无逐章卷号；本端点把整批章节落到同一卷）。
+    """
+
+    volume: int = Field(default=1, ge=1, description="本批大纲所属卷号（M3 默认全卷 1）")
+
+
+class ForeshadowWindowView(BaseModel):
+    """单章关联的伏笔回收窗口（snake_case；形对齐 `ww_agents.ForeshadowWindow`）。"""
+
+    code: str
+    plant_chapter: int | None = None
+    expected_close_from: int | None = None
+    expected_close_to: int | None = None
+
+
+class OutlineChapterView(BaseModel):
+    """单章大纲视图：章号 + 卷 + 节拍 + 伏笔窗口。"""
+
+    no: int
+    volume: int
+    beats: list[str] = Field(default_factory=list)
+    foreshadow_windows: list[ForeshadowWindowView] = Field(default_factory=list)
+
+
+class OutlineResponse(BaseModel):
+    """大纲生成响应：逐章已持久化的大纲（含窗口，供前端 T3.6）。"""
+
+    chapters: list[OutlineChapterView] = Field(default_factory=list)
--- a/apps/api/ww_api/services/accept_service.py
+++ b/apps/api/ww_api/services/accept_service.py
@@ -114,9 +114,11 @@ async def run_accept_transaction(
        )
        review_id = updated.id

-    # 步骤 3（占位）：人物 latest_state / 伏笔状态更新——M3 才正式接伏笔表，
-    # 这里按 §5.5 步骤 3 留占位，不引入 M3 表逻辑（避免越界写未就绪的状态机）。
-    # TODO(M3): 按裁决应用 latest_state 变更 + 伏笔登记/到期扫描（§6.2）。
+    # 步骤 3：伏笔到期扫描——验收提交**后**经端点登记的 BackgroundTask 跑（M3-b/d，
+    # `services/foreshadow_scan.run_overdue_scan`：current_ch > expected_close_to 且未 CLOSED
+    # → 置 OVERDUE，确定性纯函数非 AI，不变量 #3）。放在事务外/提交后是因为它是验收**结果**
+    # 的副作用、且自建独立 session（请求 session 此时已关闭）。
+    # 人物 latest_state 更新仍留后续（M4+）：本事务只落晋升 + digest + 裁决留痕。

    await session.commit()  # type: ignore[attr-defined]  # AsyncSession.commit()（fake 同形）

--- a/apps/api/ww_api/services/foreshadow_scan.py
+++ b/apps/api/ww_api/services/foreshadow_scan.py
@@ -0,0 +1,90 @@
+"""验收后伏笔到期扫描（M3-b/d；ARCH §6.2, §7.4，不变量 #3）。
+
+接 §5.5 验收事务后的 `TODO(M3)` 占位：验收**提交成功后**触发一次伏笔到期扫描，把
+`current_ch > expected_close_to AND status≠CLOSED` 的伏笔确定性置 `OVERDUE`（M3-d 纯
+函数，非 Agent；不变量 #3：状态变更是确定性扫描而非 AI 静默写库）。
+
+挂载方式（端点）：FastAPI `BackgroundTasks` 在 accept 端点登记 `run_overdue_scan`。
+BackgroundTask 在请求-response 发回、请求 session 关闭**之后**才跑——故本函数**自建新
+session**（不复用请求 session）并自己 `commit()`。
+
+**持久性局限（§7.4）**：BackgroundTasks 在 API 进程内跑，进程重启/崩溃会丢失未跑完的
+任务——原型可接受，这里把触发/完成/失败都记结构化日志便于查错；**不引入 `jobs` 表**
+（那是 M4/T4.1 的工作，本任务不越界）。
+
+可测性：扫描逻辑抽成纯 async 函数 `run_overdue_scan(session_factory, ...)`，端点用
+BackgroundTasks 调它；单测直接 `await` 它（注入 fake session 工厂）断言行被置 OVERDUE，
+**绝不真起不可控后台线程**。
+"""
+
+from __future__ import annotations
+
+import uuid
+from collections.abc import Callable
+from contextlib import AbstractAsyncContextManager
+from typing import Protocol
+
+import structlog
+from sqlalchemy.ext.asyncio import AsyncSession
+from ww_core.domain import ForeshadowLedgerView, SqlForeshadowLedgerRepo
+
+log = structlog.get_logger(__name__)
+
+# 新建独立 session 的工厂：调用得到一个 async 上下文管理器（`async with` → AsyncSession）。
+SessionFactory = Callable[[], AbstractAsyncContextManager[AsyncSession]]
+
+
+class OverdueScanRepo(Protocol):
+    """到期扫描对账本 repo 的最小依赖（仅 `scan_overdue`）。"""
+
+    async def scan_overdue(
+        self, project_id: uuid.UUID, *, current_chapter: int
+    ) -> list[ForeshadowLedgerView]: ...
+
+
+# repo 工厂：从新 session 造账本 repo。默认建 SQL 实现；测试注入 fake（避免真连 DB）。
+RepoFactory = Callable[[AsyncSession], OverdueScanRepo]
+
+
+def _default_repo_factory(session: AsyncSession) -> OverdueScanRepo:
+    return SqlForeshadowLedgerRepo(session)
+
+
+async def run_overdue_scan(
+    session_factory: SessionFactory,
+    *,
+    project_id: uuid.UUID,
+    chapter_no: int,
+    request_id: str | None = None,
+    repo_factory: RepoFactory = _default_repo_factory,
+) -> int:
+    """验收后伏笔到期扫描：新建 session → `scan_overdue` 置 OVERDUE → `commit()`。
+
+    返回被置 OVERDUE 的伏笔条数（供日志/测试断言）。任何异常被捕获并记错误日志后
+    吞掉——后台任务失败不应冒泡崩进程，也不影响已成功的验收事务（§7.4 局限可接受）。
+    `repo_factory` 是可注入缝：默认建 SQL 账本 repo，测试注 fake（直接 await、不联网）。
+    """
+    try:
+        async with session_factory() as session:
+            repo = repo_factory(session)
+            changed = await repo.scan_overdue(project_id, current_chapter=chapter_no)
+            if changed:
+                await session.commit()
+            log.info(
+                "foreshadow_overdue_scan",
+                project_id=str(project_id),
+                chapter_no=chapter_no,
+                request_id=request_id,
+                overdue_count=len(changed),
+                overdue_codes=[v.code for v in changed],
+            )
+            return len(changed)
+    except Exception as exc:  # noqa: BLE001 — 后台任务边界：记错误、不冒泡崩进程（§7.4）。
+        log.error(
+            "foreshadow_overdue_scan_failed",
+            project_id=str(project_id),
+            chapter_no=chapter_no,
+            request_id=request_id,
+            error=str(exc),
+        )
+        return 0
--- a/apps/api/ww_api/services/outline_context.py
+++ b/apps/api/ww_api/services/outline_context.py
@@ -0,0 +1,87 @@
+"""大纲生成的注入上下文组装（确定性序列化文本；ARCH §5.4 outliner reads / §6.2）。
+
+把 projects 设定 + 已登记伏笔 + 人物 + 世界观确定性序列化成纯文本喂给 outliner——
+**无时间戳/无 UUID**（缓存前缀稳定，不变量 #9），逐项排序保证同输入同输出（可单测）。
+outliner 据此排出分章节拍 + 伏笔回收窗口（关联本章与伏笔，§6.2）。
+
+注：reads=["projects","foreshadow","characters","world_entities"]（C6 outliner_spec），
+本组装恰好覆盖这四源，不读 digest/outline（排大纲是从设定生成、非续写既有章）。
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from ww_core.domain import ForeshadowLedgerView, ProjectView
+from ww_core.domain.repositories import CharacterView, WorldEntityView
+
+
+def _project_block(project: ProjectView) -> str:
+    lines = [f"标题：{project.title}"]
+    if project.genre:
+        lines.append(f"类型：{project.genre}")
+    if project.logline:
+        lines.append(f"一句话简介：{project.logline}")
+    if project.premise:
+        lines.append(f"前提：{project.premise}")
+    if project.theme:
+        lines.append(f"主题：{project.theme}")
+    if project.selling_points:
+        lines.append("卖点：" + "、".join(project.selling_points))
+    if project.structure:
+        lines.append(f"结构：{project.structure}")
+    return "【作品设定】\n" + "\n".join(lines)
+
+
+def _foreshadow_block(foreshadow: Sequence[ForeshadowLedgerView]) -> str:
+    if not foreshadow:
+        return "【已登记伏笔】\n（无）"
+    rows = sorted(foreshadow, key=lambda f: f.code)
+    lines = []
+    for f in rows:
+        window = ""
+        if f.expected_close_from is not None or f.expected_close_to is not None:
+            lo = f.expected_close_from if f.expected_close_from is not None else "?"
+            hi = f.expected_close_to if f.expected_close_to is not None else "?"
+            window = f"（回收窗口 {lo}-{hi}）"
+        plant = f"埋设第{f.planted_at}章 " if f.planted_at is not None else ""
+        lines.append(f"- [{f.code}] {f.title} {plant}{window}".rstrip())
+    return "【已登记伏笔】\n" + "\n".join(lines)
+
+
+def _characters_block(characters: Sequence[CharacterView]) -> str:
+    if not characters:
+        return "【人物】\n（无）"
+    rows = sorted(characters, key=lambda c: c.name)
+    lines = []
+    for c in rows:
+        role = f"（{c.role}）" if c.role else ""
+        motive = f" 动机：{c.motive}" if c.motive else ""
+        lines.append(f"- {c.name}{role}{motive}".rstrip())
+    return "【人物】\n" + "\n".join(lines)
+
+
+def _world_block(entities: Sequence[WorldEntityView]) -> str:
+    if not entities:
+        return "【世界观】\n（无）"
+    rows = sorted(entities, key=lambda e: (e.type, e.name))
+    lines = [f"- [{e.type}] {e.name}" for e in rows]
+    return "【世界观】\n" + "\n".join(lines)
+
+
+def build_outline_context(
+    *,
+    project: ProjectView,
+    foreshadow: Sequence[ForeshadowLedgerView],
+    characters: Sequence[CharacterView],
+    world_entities: Sequence[WorldEntityView],
+) -> str:
+    """组装 outliner 注入上下文（确定性文本，纯函数）。"""
+    return "\n\n".join(
+        [
+            _project_block(project),
+            _foreshadow_block(foreshadow),
+            _characters_block(characters),
+            _world_block(world_entities),
+        ]
+    )
--- a/apps/api/ww_api/services/project_deps.py
+++ b/apps/api/ww_api/services/project_deps.py
@@ -16,13 +16,15 @@ from openai import AsyncOpenAI
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 from ww_config import get_settings
+from ww_core.domain import ForeshadowLedgerRepo, SqlForeshadowLedgerRepo
 from ww_core.domain.chapter_repo import ChapterRepo, SqlChapterRepo
 from ww_core.domain.digest_repo import DigestAppendRepo, SqlDigestAppendRepo
+from ww_core.domain.outline_write_repo import OutlineWriteRepo, SqlOutlineWriteRepo
 from ww_core.domain.project_repo import ProjectRepo, SqlProjectRepo
 from ww_core.domain.repositories import MemoryRepos
 from ww_core.domain.review_repo import ReviewRepo, SqlReviewRepo
 from ww_core.memory.sql_repositories import sql_memory_repos
-from ww_db import get_session
+from ww_db import get_session, get_sessionmaker
 from ww_db.models import User
 from ww_llm_gateway import (
    Gateway,
@@ -42,6 +44,7 @@ from ww_api.services.credentials import (
    CredentialStore,
    SqlCredentialStore,
 )
+from ww_api.services.foreshadow_scan import SessionFactory
 from ww_api.services.provider_deps import _PROVIDER_BASE_URLS

 # 单用户 stub 的占位邮箱（多租户化时由真实主体替换）。
@@ -95,6 +98,30 @@ def get_digest_append_repo(
    return SqlDigestAppendRepo(session)


+def get_foreshadow_repo(
+    session: Annotated[AsyncSession, Depends(get_session)],
+) -> ForeshadowLedgerRepo:
+    """伏笔账本写侧 repo（登记/状态变更端点；只 flush，端点提交）。测试经 override 注 fake。"""
+    return SqlForeshadowLedgerRepo(session)
+
+
+def get_outline_write_repo(
+    session: Annotated[AsyncSession, Depends(get_session)],
+) -> OutlineWriteRepo:
+    """大纲写侧 repo（大纲生成端点逐章 upsert；只 flush，端点提交）。测试经 override 注 fake。"""
+    return SqlOutlineWriteRepo(session)
+
+
+def get_session_factory() -> SessionFactory:
+    """验收后到期扫描的**独立 session 工厂**缝。
+
+    BackgroundTask 在请求 session 关闭后才跑，必须自建 session（不复用 `get_session`）。
+    返回的工厂 `()` → `async with` 得一个新 `AsyncSession`。测试经 `app.dependency_overrides`
+    注入 fake 工厂（避免真起后台线程/真连 DB）。
+    """
+    return get_sessionmaker()
+
+
 async def build_gateway_for_tier(
    session: AsyncSession, store: CredentialStore, tier: Tier
 ) -> Gateway:
@@ -160,3 +187,11 @@ async def get_digest_gateway(
    """验收终稿 digest 提炼（light 档位）的可注入网关缝。测试经 override 注 mock。"""
    store = SqlCredentialStore(session)
    return await build_gateway_for_tier(session, store, "light")
+
+
+async def get_outline_gateway(
+    session: Annotated[AsyncSession, Depends(get_session)],
+) -> Gateway:
+    """大纲生成（analyst 档位）的可注入网关缝。测试经 override 注 mock（产 OutlineResult）。"""
+    store = SqlCredentialStore(session)
+    return await build_gateway_for_tier(session, store, "analyst")
--- a/apps/web/app/projects/[id]/foreshadow/page.tsx
+++ b/apps/web/app/projects/[id]/foreshadow/page.tsx
@@ -0,0 +1,23 @@
+import { notFound } from "next/navigation";
+
+import { ForeshadowBoard } from "@/components/foreshadow/ForeshadowBoard";
+import { fetchForeshadow, fetchProject } from "@/lib/api/server";
+
+interface PageProps {
+  params: Promise<{ id: string }>;
+}
+
+// 伏笔看板页（UX §6.8）。Server Component 取项目 + 全量伏笔（GET .../foreshadow）；
+// ForeshadowBoard（Client）按 status 分四泳道并承载登记/状态变更交互。
+export default async function ForeshadowPage({ params }: PageProps) {
+  const { id } = await params;
+  try {
+    const project = await fetchProject(id);
+    const board = await fetchForeshadow(id);
+    return (
+      <ForeshadowBoard project={project} initialItems={board.foreshadow ?? []} />
+    );
+  } catch {
+    notFound();
+  }
+}
--- a/apps/web/app/projects/[id]/outline/page.tsx
+++ b/apps/web/app/projects/[id]/outline/page.tsx
@@ -0,0 +1,20 @@
+import { notFound } from "next/navigation";
+
+import { OutlineEditor } from "@/components/outline/OutlineEditor";
+import { fetchProject } from "@/lib/api/server";
+
+interface PageProps {
+  params: Promise<{ id: string }>;
+}
+
+// 大纲编辑器页（UX §6.7）。Server Component 取项目；OutlineEditor（Client）按需
+// 触发 POST .../outline 生成大纲（M3 无 GET 大纲端点，进页空、生成后填充）。
+export default async function OutlinePage({ params }: PageProps) {
+  const { id } = await params;
+  try {
+    const project = await fetchProject(id);
+    return <OutlineEditor project={project} initialChapters={[]} />;
+  } catch {
+    notFound();
+  }
+}
--- a/apps/web/components/AppShell.tsx
+++ b/apps/web/components/AppShell.tsx
@@ -8,10 +8,20 @@ interface AppShellProps {
  // 顶栏右侧的上下文信息（如作品名 / 进度）。
  title?: string;
  subtitle?: string;
+  // 项目内页给出 projectId → 左导航展开项目级入口（大纲/伏笔/审稿，UX §3.1）。
+  projectId?: string;
+  // 当前激活的项目级入口键（用于高亮）。
+  activeNav?: "write" | "outline" | "foreshadow" | "review";
 }

 // 全局外壳：顶栏(64px) + 左导航 + 主区（UX §5.1）。
-export function AppShell({ children, title, subtitle }: AppShellProps) {
+export function AppShell({
+  children,
+  title,
+  subtitle,
+  projectId,
+  activeNav,
+}: AppShellProps) {
  return (
    <div className="min-h-screen">
      <header className="flex h-16 items-center gap-4 border-b border-line bg-panel px-6">
@@ -38,7 +48,7 @@ export function AppShell({ children, title, subtitle }: AppShellProps) {
        </nav>
      </header>
      <div className="flex">
-        <LeftNav />
+        <LeftNav projectId={projectId} activeNav={activeNav} />
        <main className="min-h-[calc(100vh-4rem)] flex-1 bg-bg">{children}</main>
      </div>
    </div>
--- a/apps/web/components/LeftNav.tsx
+++ b/apps/web/components/LeftNav.tsx
@@ -3,64 +3,126 @@
 import Link from "next/link";
 import { usePathname } from "next/navigation";

+export type ActiveNav = "write" | "outline" | "foreshadow" | "review";
+
+interface LeftNavProps {
+  // 项目内页传 projectId → 展开项目级入口（大纲/伏笔/审稿，UX §3.1）。
+  projectId?: string;
+  activeNav?: ActiveNav;
+}
+
 interface NavItem {
  href: string;
  label: string;
-  // M1 仅作品库 + 设置可达；其余为后续里程碑占位（禁用）。
  enabled: boolean;
+  // 项目级入口的激活键（与 activeNav 比对高亮）。
+  key?: ActiveNav;
 }

-const NAV_ITEMS: NavItem[] = [
+const GLOBAL_ITEMS: NavItem[] = [
  { href: "/", label: "作品库", enabled: true },
  { href: "/settings/providers", label: "设置", enabled: true },
-  { href: "#outline", label: "大纲", enabled: false },
-  { href: "#codex", label: "设定库", enabled: false },
-  { href: "#foreshadow", label: "伏笔", enabled: false },
-  { href: "#review", label: "审稿", enabled: false },
-  { href: "#style", label: "文风", enabled: false },
 ];

-// 左导航：当前项朱砂竖条 + 浅晕底（UX §5.1）。
-export function LeftNav() {
+function projectItems(projectId: string): NavItem[] {
+  return [
+    {
+      href: `/projects/${projectId}/write`,
+      label: "写作",
+      enabled: true,
+      key: "write",
+    },
+    {
+      href: `/projects/${projectId}/outline`,
+      label: "大纲",
+      enabled: true,
+      key: "outline",
+    },
+    {
+      href: `/projects/${projectId}/foreshadow`,
+      label: "伏笔",
+      enabled: true,
+      key: "foreshadow",
+    },
+    {
+      href: `/projects/${projectId}/review`,
+      label: "审稿",
+      enabled: true,
+      key: "review",
+    },
+    { href: "#codex", label: "设定库", enabled: false },
+    { href: "#style", label: "文风", enabled: false },
+  ];
+}
+
+// 左导航：当前项朱砂竖条 + 浅晕底（UX §5.1 / §3.1）。
+export function LeftNav({ projectId, activeNav }: LeftNavProps) {
  const pathname = usePathname();
+  const scoped = projectId ? projectItems(projectId) : [];
+
  return (
    <nav
      className="w-44 shrink-0 border-r border-line bg-panel py-4"
      aria-label="主导航"
    >
      <ul className="flex flex-col gap-1 px-2">
-        {NAV_ITEMS.map((item) => {
-          const active = item.enabled && pathname === item.href;
-          if (!item.enabled) {
-            return (
-              <li key={item.label}>
-                <span
-                  className="block cursor-not-allowed rounded px-3 py-2 text-sm text-ink-soft/50"
-                  aria-disabled="true"
-                  title="后续里程碑开放"
-                >
-                  {item.label}
-                </span>
-              </li>
-            );
-          }
-          return (
-            <li key={item.label}>
-              <Link
-                href={item.href}
-                aria-current={active ? "page" : undefined}
-                className={`flex items-center gap-2 rounded px-3 py-2 text-sm ${
-                  active
-                    ? "border-l-2 border-cinnabar bg-[var(--color-cinnabar-wash)] text-cinnabar"
-                    : "text-ink hover:bg-[var(--color-cinnabar-wash)]"
-                }`}
-              >
-                {item.label}
-              </Link>
-            </li>
-          );
-        })}
+        {GLOBAL_ITEMS.map((item) => (
+          <NavLink
+            key={item.label}
+            item={item}
+            active={item.enabled && pathname === item.href}
+          />
+        ))}
+        {scoped.length > 0 ? (
+          <li
+            className="mt-3 px-3 pb-1 text-xs font-semibold uppercase tracking-wide text-ink-soft/60"
+            aria-hidden="true"
+          >
+            本作
+          </li>
+        ) : null}
+        {scoped.map((item) => (
+          <NavLink
+            key={item.label}
+            item={item}
+            active={
+              item.key !== undefined &&
+              (item.key === activeNav || pathname === item.href)
+            }
+          />
+        ))}
      </ul>
    </nav>
  );
 }
+
+function NavLink({ item, active }: { item: NavItem; active: boolean }) {
+  if (!item.enabled) {
+    return (
+      <li>
+        <span
+          className="block cursor-not-allowed rounded px-3 py-2 text-sm text-ink-soft/50"
+          aria-disabled="true"
+          title="后续里程碑开放"
+        >
+          {item.label}
+        </span>
+      </li>
+    );
+  }
+  return (
+    <li>
+      <Link
+        href={item.href}
+        aria-current={active ? "page" : undefined}
+        className={`flex items-center gap-2 rounded px-3 py-2 text-sm ${
+          active
+            ? "border-l-2 border-cinnabar bg-[var(--color-cinnabar-wash)] text-cinnabar"
+            : "text-ink hover:bg-[var(--color-cinnabar-wash)]"
+        }`}
+      >
+        {item.label}
+      </Link>
+    </li>
+  );
+}
--- a/apps/web/components/foreshadow/ForeshadowBoard.tsx
+++ b/apps/web/components/foreshadow/ForeshadowBoard.tsx
@@ -0,0 +1,72 @@
+"use client";
+
+import { useMemo } from "react";
+
+import { AppShell } from "@/components/AppShell";
+import type { ForeshadowView, ProjectResponse } from "@/lib/api/types";
+import {
+  LANES,
+  groupByStatus,
+  type ForeshadowStatus,
+} from "@/lib/foreshadow/board";
+import { useForeshadow } from "@/lib/foreshadow/useForeshadow";
+import { KanbanColumn } from "./KanbanColumn";
+import { RegisterForm } from "./RegisterForm";
+
+interface ForeshadowBoardProps {
+  project: ProjectResponse;
+  initialItems: ForeshadowView[];
+}
+
+// 伏笔看板主体（UX §6.8）：四泳道 + 登记/状态变更交互。
+// RSC 取全量种入；Client 承载登记/转移（乐观 + 回滚 + Toast）。
+export function ForeshadowBoard({
+  project,
+  initialItems,
+}: ForeshadowBoardProps) {
+  const { items, busy, register, transition } = useForeshadow(initialItems);
+  const lanes = useMemo(() => groupByStatus(items), [items]);
+
+  const onTransition = (
+    code: string,
+    toStatus: ForeshadowStatus | null,
+    progressNote: string,
+  ): void => {
+    void transition(code, {
+      projectId: project.id,
+      toStatus,
+      progressEntry: progressNote ? { note: progressNote } : null,
+    });
+  };
+
+  return (
+    <AppShell
+      title={`〈${project.title}〉`}
+      subtitle="伏笔看板"
+      projectId={project.id}
+      activeNav="foreshadow"
+    >
+      <div className="flex h-[calc(100vh-4rem)] flex-col p-4">
+        <div className="mb-4 flex items-start justify-between gap-4">
+          <h1 className="font-serif text-lg text-ink">伏笔看板</h1>
+          <RegisterForm
+            projectId={project.id}
+            busy={busy}
+            onRegister={register}
+          />
+        </div>
+        <div className="grid min-h-0 flex-1 grid-cols-1 gap-3 md:grid-cols-2 xl:grid-cols-4">
+          {LANES.map((status) => (
+            <KanbanColumn
+              key={status}
+              status={status}
+              items={lanes[status]}
+              busy={busy}
+              onTransition={onTransition}
+            />
+          ))}
+        </div>
+      </div>
+    </AppShell>
+  );
+}
--- a/apps/web/components/foreshadow/ForeshadowCard.tsx
+++ b/apps/web/components/foreshadow/ForeshadowCard.tsx
@@ -0,0 +1,133 @@
+"use client";
+
+import { useState } from "react";
+
+import type { ForeshadowView } from "@/lib/api/types";
+import type { ForeshadowStatus } from "@/lib/foreshadow/board";
+
+interface ForeshadowCardProps {
+  item: ForeshadowView;
+  overdue: boolean;
+  busy: boolean;
+  onTransition: (
+    code: string,
+    toStatus: ForeshadowStatus | null,
+    progressNote: string,
+  ) => void;
+}
+
+const NEXT_STATUS: Record<string, ForeshadowStatus[]> = {
+  OPEN: ["PARTIAL", "CLOSED"],
+  PARTIAL: ["CLOSED"],
+  OVERDUE: ["PARTIAL", "CLOSED"],
+  CLOSED: [],
+};
+
+// 伏笔卡（UX §6.8）：code/title/回收窗口/importance/progress 时间线 + 状态变更/加进展。
+// OVERDUE 用琥珀强调（不单靠色：加 ⚠ 图标 + 文案，a11y §10）。
+export function ForeshadowCard({
+  item,
+  overdue,
+  busy,
+  onTransition,
+}: ForeshadowCardProps) {
+  const [note, setNote] = useState("");
+  const transitions = NEXT_STATUS[item.status] ?? [];
+  const windowText = recoveryWindow(item);
+
+  return (
+    <li
+      className={`rounded border bg-panel p-3 ${
+        overdue ? "border-overdue ring-1 ring-overdue/40" : "border-line"
+      }`}
+    >
+      <div className="flex items-baseline gap-2">
+        <span className="font-mono text-xs text-cinnabar">{item.code}</span>
+        {overdue ? (
+          <span className="text-xs text-overdue" aria-label="逾期">
+            ⚠ 逾期
+          </span>
+        ) : null}
+      </div>
+      <p className="mt-0.5 font-serif text-sm text-ink">{item.title}</p>
+
+      <dl className="mt-2 space-y-0.5 text-xs text-ink-soft">
+        {typeof item.planted_at === "number" ? (
+          <div>埋于 {item.planted_at} 章</div>
+        ) : null}
+        {windowText ? <div>窗口 {windowText}</div> : null}
+        {item.importance ? <div>{item.importance}</div> : null}
+      </dl>
+
+      {item.progress && item.progress.length > 0 ? (
+        <ul className="mt-2 border-l-2 border-line pl-2 text-xs text-ink-soft">
+          {item.progress.map((p, i) => (
+            <li key={i}>· {progressLabel(p)}</li>
+          ))}
+        </ul>
+      ) : null}
+
+      {transitions.length > 0 || item.status !== "CLOSED" ? (
+        <div className="mt-3 space-y-2">
+          {transitions.length > 0 ? (
+            <div className="flex flex-wrap gap-1.5">
+              {transitions.map((to) => (
+                <button
+                  key={to}
+                  type="button"
+                  disabled={busy}
+                  onClick={() => onTransition(item.code, to, "")}
+                  className="rounded border border-line px-2 py-0.5 text-xs text-ink hover:border-cinnabar hover:text-cinnabar disabled:opacity-40"
+                >
+                  → {to === "CLOSED" ? "回收" : to}
+                </button>
+              ))}
+            </div>
+          ) : null}
+          {item.status !== "CLOSED" ? (
+            <div className="flex gap-1.5">
+              <label htmlFor={`prog-${item.code}`} className="sr-only">
+                {item.code} 进展
+              </label>
+              <input
+                id={`prog-${item.code}`}
+                type="text"
+                value={note}
+                onChange={(e) => setNote(e.target.value)}
+                placeholder="加进展（如：23章发光）"
+                className="min-w-0 flex-1 rounded border border-line bg-bg px-2 py-0.5 text-xs text-ink focus:border-cinnabar focus:outline-none"
+              />
+              <button
+                type="button"
+                disabled={busy || note.trim().length === 0}
+                onClick={() => {
+                  onTransition(item.code, null, note.trim());
+                  setNote("");
+                }}
+                className="rounded border border-line px-2 py-0.5 text-xs text-ink hover:border-cinnabar disabled:opacity-40"
+              >
+                记
+              </button>
+            </div>
+          ) : null}
+        </div>
+      ) : null}
+    </li>
+  );
+}
+
+function recoveryWindow(item: ForeshadowView): string | null {
+  const from = item.expected_close_from;
+  const to = item.expected_close_to;
+  if (typeof from === "number" && typeof to === "number") return `${from}-${to}`;
+  if (typeof to === "number") return `≤${to}`;
+  if (typeof from === "number") return `≥${from}`;
+  return null;
+}
+
+function progressLabel(entry: Record<string, unknown>): string {
+  const chapter = entry["chapter"];
+  const note = entry["note"];
+  const noteStr = typeof note === "string" ? note : JSON.stringify(entry);
+  return typeof chapter === "number" ? `${chapter}章：${noteStr}` : noteStr;
+}
--- a/apps/web/components/foreshadow/KanbanColumn.tsx
+++ b/apps/web/components/foreshadow/KanbanColumn.tsx
@@ -0,0 +1,61 @@
+"use client";
+
+import type { ForeshadowView } from "@/lib/api/types";
+import type { ForeshadowStatus } from "@/lib/foreshadow/board";
+import { ForeshadowCard } from "./ForeshadowCard";
+
+interface KanbanColumnProps {
+  status: ForeshadowStatus;
+  items: ForeshadowView[];
+  busy: boolean;
+  onTransition: (
+    code: string,
+    toStatus: ForeshadowStatus | null,
+    progressNote: string,
+  ) => void;
+}
+
+// 单个状态泳道（UX §6.8）。OVERDUE 列整列琥珀强调（表头 + 卡片）。
+export function KanbanColumn({
+  status,
+  items,
+  busy,
+  onTransition,
+}: KanbanColumnProps) {
+  const overdue = status === "OVERDUE";
+  return (
+    <section
+      className="flex min-w-0 flex-col rounded border border-line bg-bg"
+      aria-label={`${status} 泳道`}
+    >
+      <header
+        className={`flex items-center justify-between rounded-t border-b px-3 py-2 ${
+          overdue
+            ? "border-overdue bg-overdue/10 text-overdue"
+            : "border-line bg-panel text-ink-soft"
+        }`}
+      >
+        <span className="font-mono text-xs font-semibold">
+          {overdue ? "⚠ " : ""}
+          {status}
+        </span>
+        <span className="font-mono text-xs">{items.length}</span>
+      </header>
+      <ul className="flex-1 space-y-2 overflow-auto p-2">
+        {items.length === 0 ? (
+          <li className="px-1 py-3 text-xs text-ink-soft/60">—</li>
+        ) : (
+          items.map((item) => (
+            <ForeshadowCard
+              key={item.code}
+              item={item}
+              overdue={overdue}
+              busy={busy}
+              onTransition={onTransition}
+            />
+          ))
+        )}
+      </ul>
+    </section>
+  );
+}
--- a/apps/web/components/foreshadow/RegisterForm.tsx
+++ b/apps/web/components/foreshadow/RegisterForm.tsx
@@ -0,0 +1,185 @@
+"use client";
+
+import { useState } from "react";
+
+import type { RegisterInput } from "@/lib/foreshadow/board";
+
+interface RegisterFormProps {
+  projectId: string;
+  busy: boolean;
+  onRegister: (input: RegisterInput) => Promise<boolean>;
+}
+
+const EMPTY = {
+  code: "",
+  title: "",
+  plantedAt: "",
+  content: "",
+  expectedCloseFrom: "",
+  expectedCloseTo: "",
+  importance: "",
+};
+
+// 登记新伏笔（UX §6.8）。受控表单 → 组装 RegisterInput；成功后清空。
+export function RegisterForm({
+  projectId,
+  busy,
+  onRegister,
+}: RegisterFormProps) {
+  const [open, setOpen] = useState(false);
+  const [form, setForm] = useState({ ...EMPTY });
+
+  const set = (key: keyof typeof EMPTY, value: string): void =>
+    setForm((prev) => ({ ...prev, [key]: value }));
+
+  const submit = async (): Promise<void> => {
+    const ok = await onRegister({
+      projectId,
+      code: form.code,
+      title: form.title,
+      plantedAt: toInt(form.plantedAt),
+      content: form.content || null,
+      expectedCloseFrom: toInt(form.expectedCloseFrom),
+      expectedCloseTo: toInt(form.expectedCloseTo),
+      importance: form.importance || null,
+    });
+    if (ok) {
+      setForm({ ...EMPTY });
+      setOpen(false);
+    }
+  };
+
+  if (!open) {
+    return (
+      <button
+        type="button"
+        onClick={() => setOpen(true)}
+        className="rounded bg-cinnabar px-3 py-1.5 text-sm text-panel hover:opacity-90"
+      >
+        ＋ 登记伏笔
+      </button>
+    );
+  }
+
+  const canSubmit =
+    form.code.trim().length > 0 && form.title.trim().length > 0 && !busy;
+
+  return (
+    <form
+      onSubmit={(e) => {
+        e.preventDefault();
+        void submit();
+      }}
+      className="rounded border border-line bg-panel p-4"
+    >
+      <div className="grid grid-cols-2 gap-3 sm:grid-cols-3">
+        <Field label="代号 *" id="f-code">
+          <input
+            id="f-code"
+            value={form.code}
+            onChange={(e) => set("code", e.target.value)}
+            className={inputCls}
+          />
+        </Field>
+        <Field label="标题 *" id="f-title" span2>
+          <input
+            id="f-title"
+            value={form.title}
+            onChange={(e) => set("title", e.target.value)}
+            className={inputCls}
+          />
+        </Field>
+        <Field label="埋设章" id="f-planted">
+          <input
+            id="f-planted"
+            inputMode="numeric"
+            value={form.plantedAt}
+            onChange={(e) => set("plantedAt", e.target.value)}
+            className={inputCls}
+          />
+        </Field>
+        <Field label="回收窗口起" id="f-from">
+          <input
+            id="f-from"
+            inputMode="numeric"
+            value={form.expectedCloseFrom}
+            onChange={(e) => set("expectedCloseFrom", e.target.value)}
+            className={inputCls}
+          />
+        </Field>
+        <Field label="回收窗口止" id="f-to">
+          <input
+            id="f-to"
+            inputMode="numeric"
+            value={form.expectedCloseTo}
+            onChange={(e) => set("expectedCloseTo", e.target.value)}
+            className={inputCls}
+          />
+        </Field>
+        <Field label="重要度" id="f-imp">
+          <input
+            id="f-imp"
+            value={form.importance}
+            onChange={(e) => set("importance", e.target.value)}
+            placeholder="主线/支线"
+            className={inputCls}
+          />
+        </Field>
+        <Field label="线索内容" id="f-content" span3>
+          <input
+            id="f-content"
+            value={form.content}
+            onChange={(e) => set("content", e.target.value)}
+            className={inputCls}
+          />
+        </Field>
+      </div>
+      <div className="mt-3 flex items-center gap-2">
+        <button
+          type="submit"
+          disabled={!canSubmit}
+          className="rounded bg-cinnabar px-3 py-1.5 text-sm text-panel hover:opacity-90 disabled:opacity-40"
+        >
+          {busy ? "登记中…" : "登记"}
+        </button>
+        <button
+          type="button"
+          onClick={() => setOpen(false)}
+          className="rounded border border-line px-3 py-1.5 text-sm text-ink-soft hover:border-cinnabar"
+        >
+          取消
+        </button>
+      </div>
+    </form>
+  );
+}
+
+const inputCls =
+  "w-full rounded border border-line bg-bg px-2 py-1 text-sm text-ink focus:border-cinnabar focus:outline-none";
+
+interface FieldProps {
+  label: string;
+  id: string;
+  span2?: boolean;
+  span3?: boolean;
+  children: React.ReactNode;
+}
+
+function Field({ label, id, span2, span3, children }: FieldProps) {
+  const span = span3 ? "col-span-2 sm:col-span-3" : span2 ? "col-span-2" : "";
+  return (
+    <div className={span}>
+      <label htmlFor={id} className="block text-xs text-ink-soft">
+        {label}
+      </label>
+      <div className="mt-0.5">{children}</div>
+    </div>
+  );
+}
+
+function toInt(raw: string): number | null {
+  const trimmed = raw.trim();
+  if (trimmed.length === 0) return null;
+  const n = Number.parseInt(trimmed, 10);
+  return Number.isInteger(n) ? n : null;
+}
--- a/apps/web/components/outline/OutlineChapterRow.tsx
+++ b/apps/web/components/outline/OutlineChapterRow.tsx
@@ -0,0 +1,51 @@
+"use client";
+
+import type { OutlineChapterView } from "@/lib/api/types";
+import {
+  isCloseWindow,
+  windowBadgeLabel,
+} from "@/lib/outline/outline";
+
+interface OutlineChapterRowProps {
+  chapter: OutlineChapterView;
+}
+
+// 单章大纲行（UX §6.7）：章号 + beats + 伏笔窗口徽标（⚑）。
+// 接近回收窗口的徽标用琥珀 + 「可回收」提示（a11y：图标 + 文案，不单靠色）。
+export function OutlineChapterRow({ chapter }: OutlineChapterRowProps) {
+  const windows = chapter.foreshadow_windows ?? [];
+  return (
+    <li className="border-l-2 border-line py-2 pl-3">
+      <div className="flex flex-wrap items-center gap-2">
+        <span className="font-mono text-xs text-ink-soft">
+          第 {chapter.no} 章
+        </span>
+        {windows.map((w) => {
+          const close = isCloseWindow(chapter, w);
+          return (
+            <span
+              key={w.code}
+              title={close ? "进入回收窗口，建议本章安排回收" : undefined}
+              className={`rounded px-1.5 py-0.5 text-xs ${
+                close
+                  ? "bg-overdue/15 text-overdue"
+                  : "bg-[var(--color-cinnabar-wash)] text-cinnabar"
+              }`}
+            >
+              {windowBadgeLabel(w)}
+              {close ? " · 可回收" : ""}
+            </span>
+          );
+        })}
+      </div>
+      {chapter.beats && chapter.beats.length > 0 ? (
+        <p className="mt-1 text-sm text-ink">
+          <span className="text-ink-soft">beats: </span>
+          {chapter.beats.join(" / ")}
+        </p>
+      ) : (
+        <p className="mt-1 text-sm text-ink-soft/60">（无节拍）</p>
+      )}
+    </li>
+  );
+}
--- a/apps/web/components/outline/OutlineEditor.tsx
+++ b/apps/web/components/outline/OutlineEditor.tsx
@@ -0,0 +1,97 @@
+"use client";
+
+import { useMemo, useState } from "react";
+
+import { AppShell } from "@/components/AppShell";
+import type { OutlineChapterView, ProjectResponse } from "@/lib/api/types";
+import { groupByVolume } from "@/lib/outline/outline";
+import { useOutline } from "@/lib/outline/useOutline";
+import { OutlineChapterRow } from "./OutlineChapterRow";
+
+interface OutlineEditorProps {
+  project: ProjectResponse;
+  initialChapters: OutlineChapterView[];
+}
+
+// 大纲编辑器主体（UX §6.7）。RSC 种入已存大纲；Client 承载生成（POST .../outline）。
+// 无凭据 → 503 LLM_UNAVAILABLE 经 error 检出、引导去设置。
+export function OutlineEditor({
+  project,
+  initialChapters,
+}: OutlineEditorProps) {
+  const { chapters, status, error, generate } = useOutline(initialChapters);
+  const [volume, setVolume] = useState(1);
+  const volumes = useMemo(() => groupByVolume(chapters), [chapters]);
+  const generating = status === "generating";
+
+  return (
+    <AppShell
+      title={`〈${project.title}〉`}
+      subtitle="大纲"
+      projectId={project.id}
+      activeNav="outline"
+    >
+      <div className="flex h-[calc(100vh-4rem)] flex-col p-6">
+        <div className="mb-4 flex items-center gap-3">
+          <h1 className="font-serif text-lg text-ink">大纲</h1>
+          <label htmlFor="vol" className="ml-auto text-xs text-ink-soft">
+            卷号
+          </label>
+          <input
+            id="vol"
+            inputMode="numeric"
+            value={volume}
+            onChange={(e) => setVolume(Math.max(1, Number(e.target.value) || 1))}
+            className="w-16 rounded border border-line bg-bg px-2 py-1 text-sm text-ink focus:border-cinnabar focus:outline-none"
+          />
+          <button
+            type="button"
+            disabled={generating}
+            onClick={() => void generate(project.id, volume)}
+            className="rounded bg-cinnabar px-3 py-1.5 text-sm text-panel hover:opacity-90 disabled:opacity-40"
+          >
+            {generating ? "排大纲中…" : "✦ AI 排大纲"}
+          </button>
+        </div>
+
+        {error ? (
+          <p className="mb-4 text-sm text-conflict">
+            大纲生成失败（{error.code}）：{error.message}
+            {error.code === "LLM_UNAVAILABLE" ? (
+              <>
+                {" "}
+                <a
+                  href="/settings/providers"
+                  className="underline hover:text-cinnabar"
+                >
+                  去设置提供商
+                </a>
+              </>
+            ) : null}
+          </p>
+        ) : null}
+
+        <div className="min-h-0 flex-1 overflow-auto">
+          {volumes.length === 0 ? (
+            <p className="rounded border border-dashed border-line p-6 text-sm text-ink-soft">
+              暂无大纲。点「✦ AI 排大纲」生成逐章节拍与伏笔窗口。
+            </p>
+          ) : (
+            volumes.map((group) => (
+              <section key={group.volume} className="mb-6">
+                <h2 className="mb-2 font-serif text-base text-ink">
+                  卷 {group.volume}
+                </h2>
+                <ul className="space-y-1">
+                  {group.chapters.map((ch) => (
+                    <OutlineChapterRow key={ch.no} chapter={ch} />
+                  ))}
+                </ul>
+              </section>
+            ))
+          )}
+        </div>
+      </div>
+    </AppShell>
+  );
+}
--- a/apps/web/components/review/BeatMap.tsx
+++ b/apps/web/components/review/BeatMap.tsx
@@ -0,0 +1,34 @@
+"use client";
+
+import { toBeatCells, toSparkline } from "@/lib/pace/beatmap";
+
+interface BeatMapProps {
+  beatMap: number[];
+}
+
+// 爽点节拍图（UX §6.4）：beat_map(int 序列) → ▁▃▅ 柱状条。
+// 渲染为定高柱（CSS height%），同时给文本 sparkline 作无障碍标签（a11y §10）。
+// 静态高度，无动画 → 天然尊重 prefers-reduced-motion。
+export function BeatMap({ beatMap }: BeatMapProps) {
+  const cells = toBeatCells(beatMap);
+  if (cells.length === 0) {
+    return <span className="text-xs text-ink-soft/60">无节拍数据</span>;
+  }
+  const spark = toSparkline(beatMap);
+  return (
+    <div
+      className="flex h-12 items-end gap-0.5"
+      role="img"
+      aria-label={`爽点节拍图 ${spark}`}
+    >
+      {cells.map((cell, i) => (
+        <div
+          key={i}
+          className="min-w-[4px] flex-1 rounded-t bg-cinnabar/70"
+          style={{ height: `${cell.heightPct}%` }}
+          title={`第${i + 1}拍 强度${cell.value}`}
+        />
+      ))}
+    </div>
+  );
+}
--- a/apps/web/components/review/ForeshadowSuggestions.tsx
+++ b/apps/web/components/review/ForeshadowSuggestions.tsx
@@ -0,0 +1,58 @@
+"use client";
+
+import type { ForeshadowSuggestion } from "@/lib/review/sse";
+
+interface ForeshadowSuggestionsProps {
+  suggestions: ForeshadowSuggestion[];
+  // 审项是否未完成（incomplete）。
+  incomplete: boolean;
+}
+
+// 伏笔建议区（UX §6.4 ②）：planted「新埋待确认」/ resolved「疑似回收」，只读建议。
+// 不静默写库（不变量#3）：仅展示，登记/回收经伏笔看板显式确认。
+export function ForeshadowSuggestions({
+  suggestions,
+  incomplete,
+}: ForeshadowSuggestionsProps) {
+  return (
+    <section className="mb-4">
+      <h2 className="text-xs font-semibold uppercase tracking-wide text-ink-soft">
+        伏笔 (foreshadow-analyst)
+      </h2>
+      {incomplete ? (
+        <p className="mt-1 text-xs text-overdue">◌ 未完成</p>
+      ) : suggestions.length === 0 ? (
+        <p className="mt-1 text-xs text-ink-soft">无伏笔建议。</p>
+      ) : (
+        <ul className="mt-2 space-y-2">
+          {suggestions.map((s, i) => (
+            <li
+              key={i}
+              className="rounded border border-line bg-panel p-2 text-xs"
+            >
+              <span
+                className={`mr-1 rounded px-1.5 py-0.5 ${
+                  s.kind === "resolved"
+                    ? "bg-pass/15 text-pass"
+                    : "bg-[var(--color-cinnabar-wash)] text-cinnabar"
+                }`}
+              >
+                {s.kind === "resolved" ? "⚑ 疑似回收" : "＋ 新埋待确认"}
+              </span>
+              {s.code ? (
+                <span className="font-mono text-ink-soft"> {s.code}</span>
+              ) : null}
+              <p className="mt-1 text-ink">{s.title}</p>
+              {s.where ? (
+                <span className="text-ink-soft">{s.where}</span>
+              ) : null}
+              {s.note ? (
+                <p className="mt-0.5 text-ink-soft">{s.note}</p>
+              ) : null}
+            </li>
+          ))}
+        </ul>
+      )}
+    </section>
+  );
+}
--- a/apps/web/components/review/PacePanel.tsx
+++ b/apps/web/components/review/PacePanel.tsx
@@ -0,0 +1,56 @@
+"use client";
+
+import type { PaceReport } from "@/lib/review/sse";
+import { BeatMap } from "./BeatMap";
+
+interface PacePanelProps {
+  pace: PaceReport | null;
+  incomplete: boolean;
+}
+
+// 节奏报告区（UX §6.4 ④）：节拍图 ▁▃▅ + 注水段列表 + 章末钩子徽标。只读建议。
+export function PacePanel({ pace, incomplete }: PacePanelProps) {
+  return (
+    <section className="mb-4">
+      <h2 className="text-xs font-semibold uppercase tracking-wide text-ink-soft">
+        节奏 (pace-checker)
+      </h2>
+      {incomplete ? (
+        <p className="mt-1 text-xs text-overdue">◌ 未完成</p>
+      ) : pace === null ? (
+        <p className="mt-1 text-xs text-ink-soft">无节奏报告。</p>
+      ) : (
+        <div className="mt-2 space-y-2 text-xs">
+          <div>
+            <p className="mb-1 text-ink-soft">爽点节拍图</p>
+            <BeatMap beatMap={pace.beat_map} />
+          </div>
+
+          <p>
+            章末钩子：
+            {pace.hook ? (
+              <span className="text-pass">✓ 有</span>
+            ) : (
+              <span className="text-overdue">⚠ 无（建议补悬念）</span>
+            )}
+          </p>
+
+          {pace.water.length > 0 ? (
+            <div>
+              <p className="text-overdue">⚠ 注水段</p>
+              <ul className="mt-1 space-y-1">
+                {pace.water.map((w, i) => (
+                  <li key={i} className="text-ink-soft">
+                    {w.where}：{w.reason}
+                  </li>
+                ))}
+              </ul>
+            </div>
+          ) : (
+            <p className="text-pass">✓ 无明显注水</p>
+          )}
+        </div>
+      )}
+    </section>
+  );
+}
--- a/apps/web/components/review/ReviewReport.tsx
+++ b/apps/web/components/review/ReviewReport.tsx
@@ -13,13 +13,19 @@ import {
  type DecisionDraft,
  type Verdict,
 } from "@/lib/review/decisions";
-import { normalizeConflicts } from "@/lib/review/history";
+import {
+  normalizeConflicts,
+  normalizeForeshadowSug,
+  normalizePace,
+} from "@/lib/review/history";
 import { useAccept } from "@/lib/review/useAccept";
 import { useReviewStream } from "@/lib/review/useReviewStream";
 import type { ReviewConflict } from "@/lib/review/sse";
 import { AcceptPanel } from "./AcceptPanel";
 import { AnnotatedText } from "./AnnotatedText";
 import { ConflictCard } from "./ConflictCard";
+import { ForeshadowSuggestions } from "./ForeshadowSuggestions";
+import { PacePanel } from "./PacePanel";

 interface ReviewReportProps {
  project: ProjectResponse;
@@ -48,19 +54,41 @@ export function ReviewReport({
  const [missing, setMissing] = useState<Set<number>>(new Set());
  const seededRef = useRef(false);

-  // 进页一次性把历史 conflicts 种入流状态（无需重审即可裁决）。
+  // 进页一次性把历史留痕（冲突 + 伏笔建议 + 节奏）种入流状态（无需重审即可裁决/查看）。
  const seededConflicts = useMemo(
    () => normalizeConflicts(initialReview),
    [initialReview],
  );
+  const seededForeshadow = useMemo(
+    () => normalizeForeshadowSug(initialReview),
+    [initialReview],
+  );
+  const seededPace = useMemo(
+    () => normalizePace(initialReview),
+    [initialReview],
+  );
  useEffect(() => {
    if (seededRef.current) return;
    seededRef.current = true;
-    if (seededConflicts.length > 0) review.seed(seededConflicts);
-  }, [review, seededConflicts]);
+    const hasSeed =
+      seededConflicts.length > 0 ||
+      seededForeshadow.length > 0 ||
+      seededPace !== null;
+    if (hasSeed) {
+      review.seed({
+        conflicts: seededConflicts,
+        foreshadow: seededForeshadow,
+        pace: seededPace,
+      });
+    }
+  }, [review, seededConflicts, seededForeshadow, seededPace]);

  // 当前生效冲突 = 流状态（重审后即时更新，否则种入的历史）。
  const conflicts: ReviewConflict[] = review.state.conflicts;
+  const foreshadow = review.state.foreshadow;
+  const pace = review.state.pace;
+  const sectionStatus = (name: string): string | undefined =>
+    review.state.sections.find((s) => s.name === name)?.status;

  // 重审完成（done 边沿）→ 重置裁决草稿对齐新冲突集（冲突可能整组变化）。
  const conflictCount = conflicts.length;
@@ -127,6 +155,8 @@ export function ReviewReport({
    <AppShell
      title={`〈${project.title}〉`}
      subtitle={`第 ${chapterNo} 章 · 审稿报告`}
+      projectId={project.id}
+      activeNav="review"
    >
      <div className="grid h-[calc(100vh-4rem)] grid-cols-1 lg:grid-cols-[1fr_24rem]">
        {/* 左：终稿正文 + 就地标注 */}
@@ -240,6 +270,17 @@ export function ReviewReport({
            )}
          </section>

+          <div className="mt-4 border-t border-line pt-4">
+            <ForeshadowSuggestions
+              suggestions={foreshadow}
+              incomplete={sectionStatus("foreshadow") === "incomplete"}
+            />
+            <PacePanel
+              pace={pace}
+              incomplete={sectionStatus("pace") === "incomplete"}
+            />
+          </div>
+
          <section className="mt-4">
            <AcceptPanel
              conflictCount={conflictCount}
--- a/apps/web/components/workbench/Workbench.tsx
+++ b/apps/web/components/workbench/Workbench.tsx
@@ -55,6 +55,8 @@ export function Workbench({ project }: WorkbenchProps) {
    <AppShell
      title={`〈${project.title}〉`}
      subtitle={`第 ${chapterNo} 章`}
+      projectId={project.id}
+      activeNav="write"
    >
      <div className="grid h-[calc(100vh-4rem)] grid-cols-1 lg:grid-cols-[12rem_1fr_18rem]">
        <ChapterList currentChapterNo={chapterNo} />
@@ -137,6 +139,18 @@ function Toolbar({
        <span className="font-mono text-xs text-ink-soft">
          字数 {wordCount.toLocaleString()}
        </span>
+        <Link
+          href={`/projects/${projectId}/outline`}
+          className="rounded border border-line px-4 py-2 text-sm text-ink hover:border-cinnabar hover:text-cinnabar"
+        >
+          大纲
+        </Link>
+        <Link
+          href={`/projects/${projectId}/foreshadow`}
+          className="rounded border border-line px-4 py-2 text-sm text-ink hover:border-cinnabar hover:text-cinnabar"
+        >
+          伏笔
+        </Link>
        <Link
          href={`/projects/${projectId}/review?chapter=${chapterNo}`}
          className="rounded border border-cinnabar px-4 py-2 text-sm text-cinnabar hover:bg-[var(--color-cinnabar-wash)]"
--- a/apps/web/lib/api/schema.d.ts
+++ b/apps/web/lib/api/schema.d.ts
@@ -169,7 +169,14 @@ export interface paths {
        /**
         * Accept Chapter
         * @description 验收事务 + 冲突 gate（§5.5）：gate（事务前）→ 终稿提炼 digest（事务外，R2）→
-         *     单原子事务（晋升 + digest + 裁决留痕）→ 一次 commit。
+         *     单原子事务（晋升 + digest + 裁决留痕）→ 一次 commit → 登记**验收后伏笔到期扫描**
+         *     BackgroundTask（M3-b/d，§6.2）。
+         *
+         *     到期扫描接 §5.5 步骤 3 的 `TODO(M3)` 占位：验收提交成功**后**，把
+         *     `current_ch > expected_close_to AND status≠CLOSED` 的伏笔确定性置 OVERDUE。
+         *     伏笔登记/回收（PARTIAL/CLOSED）的「采纳建议」经作者经 foreshadow 端点显式确认，
+         *     不在验收事务里 AI 静默改库（不变量 #3）。**§7.4 持久性局限**：BackgroundTask 进程内
+         *     跑、重启丢失——原型可接受（见 `services/foreshadow_scan.py`，不引入 jobs 表）。
         */
        post: operations["accept_chapter_projects__project_id__chapters__chapter_no__accept_post"];
        delete?: never;
@@ -178,6 +185,75 @@ export interface paths {
        patch?: never;
        trace?: never;
    };
+    "/projects/{project_id}/foreshadow": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        /**
+         * List Foreshadow
+         * @description 伏笔看板：按 `status` 过滤（缺省=全部），按 code 升序。
+         *
+         *     `status` 非法（不在 OPEN/PARTIAL/CLOSED/OVERDUE）→ VALIDATION 信封。四泳道前端
+         *     据 `status` 分组；OVERDUE 泳道 + 逾期标记用 `expected_close_to`（看板字段已齐）。
+         */
+        get: operations["list_foreshadow_projects__project_id__foreshadow_get"];
+        put?: never;
+        /**
+         * Register Foreshadow
+         * @description 登记一条伏笔（status=OPEN）。重复 `code` → DB 唯一约束冲突 → VALIDATION 信封。
+         */
+        post: operations["register_foreshadow_projects__project_id__foreshadow_post"];
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
+    "/projects/{project_id}/foreshadow/{code}": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        get?: never;
+        put?: never;
+        post?: never;
+        delete?: never;
+        options?: never;
+        head?: never;
+        /**
+         * Update Foreshadow
+         * @description 状态机转移 和/或 追加进展。非法转移 → VALIDATION 信封；不存在 → NOT_FOUND。
+         *
+         *     `to_status` 与 `progress_entry` 皆可选；两者都缺 → VALIDATION（无操作）。先转移、后追加。
+         */
+        patch: operations["update_foreshadow_projects__project_id__foreshadow__code__patch"];
+        trace?: never;
+    };
+    "/projects/{project_id}/outline": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        get?: never;
+        put?: never;
+        /**
+         * Generate Outline
+         * @description 生成大纲并逐章持久化。无凭据 → LLM_UNAVAILABLE；项目不存在 → NOT_FOUND。
+         */
+        post: operations["generate_outline_projects__project_id__outline_post"];
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
    "/settings/providers": {
        parameters: {
            query?: never;
@@ -338,11 +414,164 @@ export interface components {
            /** Text */
            text: string;
        };
+        /**
+         * ForeshadowBoardResponse
+         * @description GET /projects/:id/foreshadow?status=：伏笔看板（四泳道 + OVERDUE 字段齐）。
+         *
+         *     `status` 缺省返回全部；按 `code` 升序（repo `list_by_status` 已排序）。前端按
+         *     `status` 分四泳道（OPEN/PARTIAL/CLOSED/OVERDUE），用 `expected_close_to` 标逾期。
+         */
+        ForeshadowBoardResponse: {
+            /** Foreshadow */
+            foreshadow?: components["schemas"]["ForeshadowView"][];
+        };
+        /**
+         * ForeshadowRegisterRequest
+         * @description POST /projects/:id/foreshadow：作者显式登记一条伏笔（status 落 OPEN）。
+         */
+        ForeshadowRegisterRequest: {
+            /**
+             * Code
+             * @description 伏笔代号，`(project_id, code)` 唯一
+             */
+            code: string;
+            /**
+             * Title
+             * @description 伏笔标题/一句话描述
+             */
+            title: string;
+            /**
+             * Planted At
+             * @description 埋设章号
+             */
+            planted_at?: number | null;
+            /**
+             * Content
+             * @description 伏笔正文/线索
+             */
+            content?: string | null;
+            /**
+             * Expected Close From
+             * @description 预期回收窗口起始章
+             */
+            expected_close_from?: number | null;
+            /**
+             * Expected Close To
+             * @description 预期回收窗口结束章（到期判据用）
+             */
+            expected_close_to?: number | null;
+            /**
+             * Importance
+             * @description 重要度（自由文本，看板用）
+             */
+            importance?: string | null;
+        };
+        /**
+         * ForeshadowTransitionRequest
+         * @description PATCH /projects/:id/foreshadow/:code：状态机转移 和/或 追加一条进展。
+         *
+         *     两字段皆可选：`to_status` 走状态机（非法 → VALIDATION 信封）；`progress_entry`
+         *     append-only 追加到 progress JSONB。二者可同时给（先转移、后追加进展）。
+         */
+        ForeshadowTransitionRequest: {
+            /**
+             * To Status
+             * @description 目标状态（OPEN/PARTIAL/CLOSED/OVERDUE）
+             */
+            to_status?: string | null;
+            /**
+             * Progress Entry
+             * @description 追加一条进展记录（append-only，不覆盖历史）
+             */
+            progress_entry?: {
+                [key: string]: unknown;
+            } | null;
+        };
+        /**
+         * ForeshadowView
+         * @description 伏笔账本视图（登记/状态变更/看板共用；snake_case）。形对齐 `ForeshadowLedgerView`。
+         */
+        ForeshadowView: {
+            /** Code */
+            code: string;
+            /** Title */
+            title: string;
+            /** Status */
+            status: string;
+            /** Planted At */
+            planted_at?: number | null;
+            /** Content */
+            content?: string | null;
+            /** Expected Close From */
+            expected_close_from?: number | null;
+            /** Expected Close To */
+            expected_close_to?: number | null;
+            /** Importance */
+            importance?: string | null;
+            /** Links */
+            links?: {
+                [key: string]: unknown;
+            }[];
+            /** Progress */
+            progress?: {
+                [key: string]: unknown;
+            }[];
+        };
+        /**
+         * ForeshadowWindowView
+         * @description 单章关联的伏笔回收窗口（snake_case；形对齐 `ww_agents.ForeshadowWindow`）。
+         */
+        ForeshadowWindowView: {
+            /** Code */
+            code: string;
+            /** Plant Chapter */
+            plant_chapter?: number | null;
+            /** Expected Close From */
+            expected_close_from?: number | null;
+            /** Expected Close To */
+            expected_close_to?: number | null;
+        };
        /** HTTPValidationError */
        HTTPValidationError: {
            /** Detail */
            detail?: components["schemas"]["ValidationError"][];
        };
+        /**
+         * OutlineChapterView
+         * @description 单章大纲视图：章号 + 卷 + 节拍 + 伏笔窗口。
+         */
+        OutlineChapterView: {
+            /** No */
+            no: number;
+            /** Volume */
+            volume: number;
+            /** Beats */
+            beats?: string[];
+            /** Foreshadow Windows */
+            foreshadow_windows?: components["schemas"]["ForeshadowWindowView"][];
+        };
+        /**
+         * OutlineGenerateRequest
+         * @description POST /projects/:id/outline：触发大纲生成 + 持久化。
+         *
+         *     M3 简单分卷：`volume` 缺省=1（schema 无逐章卷号；本端点把整批章节落到同一卷）。
+         */
+        OutlineGenerateRequest: {
+            /**
+             * Volume
+             * @description 本批大纲所属卷号（M3 默认全卷 1）
+             * @default 1
+             */
+            volume: number;
+        };
+        /**
+         * OutlineResponse
+         * @description 大纲生成响应：逐章已持久化的大纲（含窗口，供前端 T3.6）。
+         */
+        OutlineResponse: {
+            /** Chapters */
+            chapters?: components["schemas"]["OutlineChapterView"][];
+        };
        /**
         * ProjectCreateRequest
         * @description POST /projects：立项向导字段（owner_id 由后端补 stub，不入参）。
@@ -898,6 +1127,145 @@ export interface operations {
            };
        };
    };
+    list_foreshadow_projects__project_id__foreshadow_get: {
+        parameters: {
+            query?: {
+                status?: string | null;
+            };
+            header?: never;
+            path: {
+                project_id: string;
+            };
+            cookie?: never;
+        };
+        requestBody?: never;
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ForeshadowBoardResponse"];
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
+    register_foreshadow_projects__project_id__foreshadow_post: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path: {
+                project_id: string;
+            };
+            cookie?: never;
+        };
+        requestBody: {
+            content: {
+                "application/json": components["schemas"]["ForeshadowRegisterRequest"];
+            };
+        };
+        responses: {
+            /** @description Successful Response */
+            201: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ForeshadowView"];
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
+    update_foreshadow_projects__project_id__foreshadow__code__patch: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path: {
+                project_id: string;
+                code: string;
+            };
+            cookie?: never;
+        };
+        requestBody: {
+            content: {
+                "application/json": components["schemas"]["ForeshadowTransitionRequest"];
+            };
+        };
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["ForeshadowView"];
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
+    generate_outline_projects__project_id__outline_post: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path: {
+                project_id: string;
+            };
+            cookie?: never;
+        };
+        requestBody: {
+            content: {
+                "application/json": components["schemas"]["OutlineGenerateRequest"];
+            };
+        };
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["OutlineResponse"];
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
    list_providers_settings_providers_get: {
        parameters: {
            query?: never;
--- a/apps/web/lib/api/server.ts
+++ b/apps/web/lib/api/server.ts
@@ -1,5 +1,6 @@
 import { serverApiBase } from "./config";
 import type {
+  ForeshadowBoardResponse,
  ProjectListResponse,
  ProjectResponse,
  ProvidersResponse,
@@ -35,3 +36,10 @@ export async function fetchReviews(
    `/projects/${projectId}/chapters/${chapterNo}/reviews`,
  );
 }
+
+// 伏笔看板（全量，前端按 status 分四泳道）。
+export async function fetchForeshadow(
+  projectId: string,
+): Promise<ForeshadowBoardResponse> {
+  return getJson<ForeshadowBoardResponse>(`/projects/${projectId}/foreshadow`);
+}
--- a/apps/web/lib/api/types.ts
+++ b/apps/web/lib/api/types.ts
@@ -25,3 +25,18 @@ export type ReviewHistoryResponse =
 export type ConflictDecision = components["schemas"]["ConflictDecision"];
 export type AcceptRequest = components["schemas"]["AcceptRequest"];
 export type AcceptResponse = components["schemas"]["AcceptResponse"];
+
+// M3 伏笔 + 大纲（C3 扩 T3.2/T3.5）。
+export type ForeshadowView = components["schemas"]["ForeshadowView"];
+export type ForeshadowBoardResponse =
+  components["schemas"]["ForeshadowBoardResponse"];
+export type ForeshadowRegisterRequest =
+  components["schemas"]["ForeshadowRegisterRequest"];
+export type ForeshadowTransitionRequest =
+  components["schemas"]["ForeshadowTransitionRequest"];
+export type ForeshadowWindowView =
+  components["schemas"]["ForeshadowWindowView"];
+export type OutlineChapterView = components["schemas"]["OutlineChapterView"];
+export type OutlineGenerateRequest =
+  components["schemas"]["OutlineGenerateRequest"];
+export type OutlineResponse = components["schemas"]["OutlineResponse"];
--- a/apps/web/lib/foreshadow/board.test.ts
+++ b/apps/web/lib/foreshadow/board.test.ts
@@ -0,0 +1,134 @@
+import { describe, expect, it } from "vitest";
+
+import type { ForeshadowView } from "@/lib/api/types";
+import {
+  buildRegisterRequest,
+  buildTransitionRequest,
+  extractReason,
+  groupByStatus,
+  isWindowApproaching,
+  validationReasonMessage,
+} from "./board";
+
+const view = (over: Partial<ForeshadowView>): ForeshadowView => ({
+  code: "F-001",
+  title: "线索",
+  status: "OPEN",
+  ...over,
+});
+
+describe("groupByStatus", () => {
+  it("splits items into four lanes preserving order", () => {
+    const lanes = groupByStatus([
+      view({ code: "F-001", status: "OPEN" }),
+      view({ code: "F-002", status: "OVERDUE" }),
+      view({ code: "F-003", status: "OPEN" }),
+      view({ code: "F-004", status: "CLOSED" }),
+      view({ code: "F-005", status: "PARTIAL" }),
+    ]);
+    expect(lanes.OPEN.map((v) => v.code)).toEqual(["F-001", "F-003"]);
+    expect(lanes.OVERDUE.map((v) => v.code)).toEqual(["F-002"]);
+    expect(lanes.CLOSED.map((v) => v.code)).toEqual(["F-004"]);
+    expect(lanes.PARTIAL.map((v) => v.code)).toEqual(["F-005"]);
+  });
+
+  it("falls back unknown status to OPEN and handles undefined", () => {
+    const lanes = groupByStatus([view({ status: "WEIRD" })]);
+    expect(lanes.OPEN).toHaveLength(1);
+    expect(groupByStatus(undefined).OPEN).toEqual([]);
+  });
+});
+
+describe("isWindowApproaching", () => {
+  it("is true when current chapter is inside [from,to] for OPEN/PARTIAL", () => {
+    const f = view({
+      status: "PARTIAL",
+      expected_close_from: 40,
+      expected_close_to: 60,
+    });
+    expect(isWindowApproaching(f, 50)).toBe(true);
+    expect(isWindowApproaching(f, 39)).toBe(false);
+    expect(isWindowApproaching(f, 61)).toBe(false);
+  });
+
+  it("never flags CLOSED/OVERDUE or items without a window", () => {
+    expect(
+      isWindowApproaching(
+        view({ status: "CLOSED", expected_close_to: 60 }),
+        50,
+      ),
+    ).toBe(false);
+    expect(isWindowApproaching(view({ status: "OPEN" }), 50)).toBe(false);
+  });
+});
+
+describe("buildRegisterRequest", () => {
+  it("trims and omits empty optionals", () => {
+    expect(
+      buildRegisterRequest({
+        projectId: "p1",
+        code: "  F-007 ",
+        title: " 旧誓约 ",
+        content: "  ",
+        expectedCloseTo: 110,
+      }),
+    ).toEqual({ code: "F-007", title: "旧誓约", expected_close_to: 110 });
+  });
+
+  it("keeps numeric and non-empty string optionals", () => {
+    expect(
+      buildRegisterRequest({
+        projectId: "p1",
+        code: "F-1",
+        title: "t",
+        plantedAt: 8,
+        content: "线索",
+        expectedCloseFrom: 40,
+        importance: "主线",
+      }),
+    ).toEqual({
+      code: "F-1",
+      title: "t",
+      planted_at: 8,
+      content: "线索",
+      expected_close_from: 40,
+      importance: "主线",
+    });
+  });
+});
+
+describe("buildTransitionRequest", () => {
+  it("includes only provided fields", () => {
+    expect(buildTransitionRequest({ projectId: "p1", toStatus: "PARTIAL" })).toEqual({
+      to_status: "PARTIAL",
+    });
+    expect(
+      buildTransitionRequest({
+        projectId: "p1",
+        progressEntry: { chapter: 23, note: "发光" },
+      }),
+    ).toEqual({ progress_entry: { chapter: 23, note: "发光" } });
+    expect(buildTransitionRequest({ projectId: "p1" })).toEqual({});
+    expect(
+      buildTransitionRequest({ projectId: "p1", progressEntry: {} }),
+    ).toEqual({});
+  });
+});
+
+describe("validationReasonMessage / extractReason", () => {
+  it("maps known reasons to friendly text", () => {
+    expect(validationReasonMessage("duplicate")).toContain("已存在");
+    expect(validationReasonMessage("invalid_transition")).toContain("终态");
+    expect(validationReasonMessage("empty_update")).toContain("进展");
+    expect(validationReasonMessage("invalid_status")).toContain("筛选");
+    expect(validationReasonMessage(undefined)).toContain("校验");
+  });
+
+  it("extracts details.reason from envelope", () => {
+    expect(
+      extractReason({ error: { details: { reason: "duplicate" } } }),
+    ).toBe("duplicate");
+    expect(extractReason({ error: { details: null } })).toBeUndefined();
+    expect(extractReason("oops")).toBeUndefined();
+  });
+});
--- a/apps/web/lib/foreshadow/board.ts
+++ b/apps/web/lib/foreshadow/board.ts
@@ -0,0 +1,141 @@
+// 伏笔看板纯逻辑：四泳道分组、登记/转移请求体组装、422 reason 映射。
+// 对齐 C3 扩（GET/POST/PATCH .../foreshadow）。纯逻辑，便于 node 环境单测。
+
+import type {
+  ForeshadowRegisterRequest,
+  ForeshadowTransitionRequest,
+  ForeshadowView,
+} from "@/lib/api/types";
+
+// 四状态泳道（UX §6.8）；OVERDUE 用琥珀强调（渲染层处理）。
+export type ForeshadowStatus = "OPEN" | "PARTIAL" | "CLOSED" | "OVERDUE";
+
+export const LANES: readonly ForeshadowStatus[] = [
+  "OPEN",
+  "PARTIAL",
+  "CLOSED",
+  "OVERDUE",
+] as const;
+
+export const LANE_LABELS: Record<ForeshadowStatus, string> = {
+  OPEN: "OPEN",
+  PARTIAL: "PARTIAL",
+  CLOSED: "CLOSED",
+  OVERDUE: "OVERDUE",
+};
+
+export type ForeshadowLanes = Record<ForeshadowStatus, ForeshadowView[]>;
+
+function emptyLanes(): ForeshadowLanes {
+  return { OPEN: [], PARTIAL: [], CLOSED: [], OVERDUE: [] };
+}
+
+function isStatus(v: string): v is ForeshadowStatus {
+  return v === "OPEN" || v === "PARTIAL" || v === "CLOSED" || v === "OVERDUE";
+}
+
+// 按 status 分四泳道（未知 status 落 OPEN 兜底）；保持 repo 已排序的 code 顺序。
+export function groupByStatus(
+  items: readonly ForeshadowView[] | undefined,
+): ForeshadowLanes {
+  const lanes = emptyLanes();
+  for (const item of items ?? []) {
+    const status = isStatus(item.status) ? item.status : "OPEN";
+    lanes[status] = [...lanes[status], item];
+  }
+  return lanes;
+}
+
+// 接近回收窗口判定：current 在 [from, to] 内，或已超 from 但尚未 CLOSED（提示安排回收）。
+// 仅对 OPEN/PARTIAL 提示；CLOSED 已回收、OVERDUE 已逾期另有强调。
+export function isWindowApproaching(
+  item: ForeshadowView,
+  currentChapter: number,
+): boolean {
+  if (item.status === "CLOSED" || item.status === "OVERDUE") return false;
+  const to = item.expected_close_to;
+  if (typeof to !== "number") return false;
+  const from = item.expected_close_from ?? to;
+  return currentChapter >= from && currentChapter <= to;
+}
+
+export interface RegisterInput {
+  projectId: string;
+  code: string;
+  title: string;
+  plantedAt?: number | null;
+  content?: string | null;
+  expectedCloseFrom?: number | null;
+  expectedCloseTo?: number | null;
+  importance?: string | null;
+}
+
+// 组装登记请求体（去空白；空可选字段省略）。
+export function buildRegisterRequest(
+  input: RegisterInput,
+): ForeshadowRegisterRequest {
+  const body: ForeshadowRegisterRequest = {
+    code: input.code.trim(),
+    title: input.title.trim(),
+  };
+  if (typeof input.plantedAt === "number") body.planted_at = input.plantedAt;
+  const content = input.content?.trim();
+  if (content) body.content = content;
+  if (typeof input.expectedCloseFrom === "number")
+    body.expected_close_from = input.expectedCloseFrom;
+  if (typeof input.expectedCloseTo === "number")
+    body.expected_close_to = input.expectedCloseTo;
+  const importance = input.importance?.trim();
+  if (importance) body.importance = importance;
+  return body;
+}
+
+export interface TransitionInput {
+  projectId: string;
+  toStatus?: ForeshadowStatus | null;
+  // 一条进展记录（自由 dict；如 {chapter, note}）。
+  progressEntry?: Record<string, unknown> | null;
+}
+
+// 组装转移/进展请求体（两字段皆可选；至少给一项由调用方校验）。
+export function buildTransitionRequest(
+  input: TransitionInput,
+): ForeshadowTransitionRequest {
+  const body: ForeshadowTransitionRequest = {};
+  if (input.toStatus) body.to_status = input.toStatus;
+  if (input.progressEntry && Object.keys(input.progressEntry).length > 0)
+    body.progress_entry = input.progressEntry;
+  return body;
+}
+
+// 422 VALIDATION 信封 details.reason（C3 扩）→ 用户文案。
+export type ValidationReason =
+  | "duplicate"
+  | "invalid_transition"
+  | "empty_update"
+  | "invalid_status";
+
+export function validationReasonMessage(reason: string | undefined): string {
+  switch (reason) {
+    case "duplicate":
+      return "该伏笔代号已存在，请换一个。";
+    case "invalid_transition":
+      return "非法状态转移（CLOSED 为终态，不可再改）。";
+    case "empty_update":
+      return "请填写目标状态或一条进展。";
+    case "invalid_status":
+      return "无效的筛选状态。";
+    default:
+      return "操作未通过校验，请检查输入。";
+  }
+}
+
+// 从错误信封安全提取 details.reason。
+export function extractReason(error: unknown): string | undefined {
+  if (typeof error !== "object" || error === null) return undefined;
+  const env = error as {
+    error?: { details?: { reason?: unknown } | null };
+  };
+  const reason = env.error?.details?.reason;
+  return typeof reason === "string" ? reason : undefined;
+}
--- a/apps/web/lib/foreshadow/useForeshadow.ts
+++ b/apps/web/lib/foreshadow/useForeshadow.ts
@@ -0,0 +1,96 @@
+"use client";
+
+import { useCallback, useState } from "react";
+
+import { api } from "@/lib/api/client";
+import { useToast } from "@/components/Toast";
+import type { ForeshadowView } from "@/lib/api/types";
+import {
+  buildRegisterRequest,
+  buildTransitionRequest,
+  extractReason,
+  validationReasonMessage,
+  type ForeshadowStatus,
+  type RegisterInput,
+  type TransitionInput,
+} from "./board";
+
+export interface UseForeshadow {
+  items: ForeshadowView[];
+  busy: boolean;
+  register: (input: RegisterInput) => Promise<boolean>;
+  transition: (code: string, input: TransitionInput) => Promise<boolean>;
+}
+
+// 伏笔登记/状态变更（乐观更新 + 回滚 + Toast）。
+// register：成功后把返回行追加进 items；422 duplicate → 友好提示，不改 items。
+// transition：先乐观替换该行 status，失败回滚到旧 items 并 toast（读 details.reason）。
+export function useForeshadow(initial: ForeshadowView[]): UseForeshadow {
+  const [items, setItems] = useState<ForeshadowView[]>(initial);
+  const [busy, setBusy] = useState(false);
+  const toast = useToast();
+
+  const register = useCallback<UseForeshadow["register"]>(
+    async (input) => {
+      setBusy(true);
+      try {
+        const { data, error } = await api.POST(
+          "/projects/{project_id}/foreshadow",
+          {
+            params: { path: { project_id: input.projectId } },
+            body: buildRegisterRequest(input),
+          },
+        );
+        if (error || !data) {
+          toast(validationReasonMessage(extractReason(error)), "error");
+          return false;
+        }
+        setItems((prev) => [...prev, data]);
+        toast(`已登记伏笔 ${data.code}`, "success");
+        return true;
+      } finally {
+        setBusy(false);
+      }
+    },
+    [toast],
+  );
+
+  const transition = useCallback<UseForeshadow["transition"]>(
+    async (code, input) => {
+      const snapshot = items;
+      // 乐观：本地先改 status（若给了 toStatus）。
+      if (input.toStatus) {
+        const next = input.toStatus as ForeshadowStatus;
+        setItems((prev) =>
+          prev.map((it) => (it.code === code ? { ...it, status: next } : it)),
+        );
+      }
+      setBusy(true);
+      try {
+        const { data, error } = await api.PATCH(
+          "/projects/{project_id}/foreshadow/{code}",
+          {
+            params: {
+              path: { project_id: input.projectId, code },
+            },
+            body: buildTransitionRequest(input),
+          },
+        );
+        if (error || !data) {
+          setItems(snapshot); // 回滚
+          toast(validationReasonMessage(extractReason(error)), "error");
+          return false;
+        }
+        // 用服务端权威行替换（status + progress 都对齐）。
+        setItems((prev) => prev.map((it) => (it.code === code ? data : it)));
+        toast(`已更新 ${data.code}`, "success");
+        return true;
+      } finally {
+        setBusy(false);
+      }
+    },
+    [items, toast],
+  );
+
+  return { items, busy, register, transition };
+}
--- a/apps/web/lib/outline/outline.test.ts
+++ b/apps/web/lib/outline/outline.test.ts
@@ -0,0 +1,63 @@
+import { describe, expect, it } from "vitest";
+
+import type {
+  ForeshadowWindowView,
+  OutlineChapterView,
+} from "@/lib/api/types";
+import {
+  groupByVolume,
+  isCloseWindow,
+  windowBadgeLabel,
+} from "./outline";
+
+const ch = (over: Partial<OutlineChapterView>): OutlineChapterView => ({
+  no: 1,
+  volume: 1,
+  beats: [],
+  foreshadow_windows: [],
+  ...over,
+});
+
+const win = (
+  over: Partial<ForeshadowWindowView>,
+): ForeshadowWindowView => ({ code: "F-012", ...over });
+
+describe("groupByVolume", () => {
+  it("groups by volume and sorts volumes and chapters ascending", () => {
+    const groups = groupByVolume([
+      ch({ no: 127, volume: 3 }),
+      ch({ no: 12, volume: 1 }),
+      ch({ no: 126, volume: 3 }),
+    ]);
+    expect(groups.map((g) => g.volume)).toEqual([1, 3]);
+    expect(groups[1]?.chapters.map((c) => c.no)).toEqual([126, 127]);
+  });
+
+  it("handles undefined", () => {
+    expect(groupByVolume(undefined)).toEqual([]);
+  });
+});
+
+describe("windowBadgeLabel", () => {
+  it("renders a range, half-open, or bare badge", () => {
+    expect(
+      windowBadgeLabel(win({ expected_close_from: 40, expected_close_to: 60 })),
+    ).toBe("⚑ F-012 (40-60)");
+    expect(windowBadgeLabel(win({ expected_close_to: 60 }))).toBe(
+      "⚑ F-012 (≤60)",
+    );
+    expect(windowBadgeLabel(win({ expected_close_from: 40 }))).toBe(
+      "⚑ F-012 (≥40)",
+    );
+    expect(windowBadgeLabel(win({}))).toBe("⚑ F-012");
+  });
+});
+
+describe("isCloseWindow", () => {
+  it("is true when chapter no is inside the recovery window", () => {
+    const w = win({ expected_close_from: 40, expected_close_to: 60 });
+    expect(isCloseWindow(ch({ no: 50 }), w)).toBe(true);
+    expect(isCloseWindow(ch({ no: 61 }), w)).toBe(false);
+    expect(isCloseWindow(ch({ no: 50 }), win({}))).toBe(false);
+  });
+});
--- a/apps/web/lib/outline/outline.ts
+++ b/apps/web/lib/outline/outline.ts
@@ -0,0 +1,49 @@
+// 大纲编辑器纯逻辑：按卷分组、伏笔窗口徽标文案、接近回收窗口提示（UX §6.7）。
+// OutlineChapterView/ForeshadowWindowView 已由 OpenAPI 强类型，无需手动收窄。
+
+import type { ForeshadowWindowView, OutlineChapterView } from "@/lib/api/types";
+
+export interface VolumeGroup {
+  volume: number;
+  chapters: OutlineChapterView[];
+}
+
+// 按 volume 分组（保持章号升序）；卷号升序。
+export function groupByVolume(
+  chapters: readonly OutlineChapterView[] | undefined,
+): VolumeGroup[] {
+  const byVolume = new Map<number, OutlineChapterView[]>();
+  for (const ch of chapters ?? []) {
+    const list = byVolume.get(ch.volume) ?? [];
+    byVolume.set(ch.volume, [...list, ch]);
+  }
+  return [...byVolume.entries()]
+    .sort(([a], [b]) => a - b)
+    .map(([volume, list]) => ({
+      volume,
+      chapters: [...list].sort((a, b) => a.no - b.no),
+    }));
+}
+
+// 伏笔窗口徽标文案：`⚑ F-012 (40-60)` / `⚑ F-012 (≤60)` / `⚑ F-012`。
+export function windowBadgeLabel(window: ForeshadowWindowView): string {
+  const from = window.expected_close_from;
+  const to = window.expected_close_to;
+  if (typeof from === "number" && typeof to === "number") {
+    return `⚑ ${window.code} (${from}-${to})`;
+  }
+  if (typeof to === "number") return `⚑ ${window.code} (≤${to})`;
+  if (typeof from === "number") return `⚑ ${window.code} (≥${from})`;
+  return `⚑ ${window.code}`;
+}
+
+// 接近回收：本章号落在窗口 [from,to] 内（提示「本章可回收」，UX §6.7 ⚑ 可回收）。
+export function isCloseWindow(
+  chapter: OutlineChapterView,
+  window: ForeshadowWindowView,
+): boolean {
+  const to = window.expected_close_to;
+  if (typeof to !== "number") return false;
+  const from = window.expected_close_from ?? to;
+  return chapter.no >= from && chapter.no <= to;
+}
--- a/apps/web/lib/outline/useOutline.ts
+++ b/apps/web/lib/outline/useOutline.ts
@@ -0,0 +1,63 @@
+"use client";
+
+import { useCallback, useState } from "react";
+
+import { api } from "@/lib/api/client";
+import { useToast } from "@/components/Toast";
+import type { OutlineChapterView } from "@/lib/api/types";
+
+export type OutlineStatus = "idle" | "generating" | "ready" | "error";
+
+export interface OutlineError {
+  code: string;
+  message: string;
+}
+
+export interface UseOutline {
+  chapters: OutlineChapterView[];
+  status: OutlineStatus;
+  error: OutlineError | null;
+  generate: (projectId: string, volume: number) => Promise<void>;
+}
+
+// 生成大纲：POST .../outline（body {volume}）。无凭据/网关失败 → 503 LLM_UNAVAILABLE
+// （流前 JSON 信封），经 error 检出、引导去设置（同 draft/review 范式）。
+export function useOutline(initial: OutlineChapterView[]): UseOutline {
+  const [chapters, setChapters] = useState<OutlineChapterView[]>(initial);
+  const [status, setStatus] = useState<OutlineStatus>(
+    initial.length > 0 ? "ready" : "idle",
+  );
+  const [error, setError] = useState<OutlineError | null>(null);
+  const toast = useToast();
+
+  const generate = useCallback<UseOutline["generate"]>(
+    async (projectId, volume) => {
+      setStatus("generating");
+      setError(null);
+      const { data, error: apiError } = await api.POST(
+        "/projects/{project_id}/outline",
+        {
+          params: { path: { project_id: projectId } },
+          body: { volume },
+        },
+      );
+      if (apiError || !data) {
+        const env = apiError as
+          | { error?: { code?: string; message?: string } }
+          | undefined;
+        const code = env?.error?.code ?? "OUTLINE_FAILED";
+        const message = env?.error?.message ?? "大纲生成失败，请重试。";
+        setError({ code, message });
+        setStatus("error");
+        toast(message, "error");
+        return;
+      }
+      setChapters(data.chapters ?? []);
+      setStatus("ready");
+      toast("大纲已生成", "success");
+    },
+    [toast],
+  );
+
+  return { chapters, status, error, generate };
+}
--- a/apps/web/lib/pace/beatmap.test.ts
+++ b/apps/web/lib/pace/beatmap.test.ts
@@ -0,0 +1,37 @@
+import { describe, expect, it } from "vitest";
+
+import { SPARK_CHARS, toBeatCells, toSparkline } from "./beatmap";
+
+describe("toBeatCells", () => {
+  it("maps min→▁ and max→▇ via linear normalization", () => {
+    const cells = toBeatCells([1, 7]);
+    expect(cells[0]?.level).toBe(0);
+    expect(cells[0]?.char).toBe("▁");
+    expect(cells[1]?.level).toBe(SPARK_CHARS.length - 1);
+    expect(cells[1]?.char).toBe("▇");
+  });
+
+  it("centers all cells when every value is equal", () => {
+    const cells = toBeatCells([5, 5, 5]);
+    expect(cells.every((c) => c.level === 3)).toBe(true);
+    expect(cells.every((c) => c.char === "▄")).toBe(true);
+  });
+
+  it("gives every cell a visible min height", () => {
+    const cells = toBeatCells([0, 10]);
+    expect(cells[0]?.heightPct).toBeGreaterThanOrEqual(12);
+    expect(cells[1]?.heightPct).toBe(100);
+  });
+
+  it("returns [] for empty or non-finite-only input", () => {
+    expect(toBeatCells([])).toEqual([]);
+    expect(toBeatCells([Number.NaN, Number.POSITIVE_INFINITY])).toEqual([]);
+  });
+});
+
+describe("toSparkline", () => {
+  it("joins chars into a sparkline string", () => {
+    expect(toSparkline([1, 4, 7])).toBe("▁▄▇");
+    expect(toSparkline([])).toBe("");
+  });
+});
--- a/apps/web/lib/pace/beatmap.ts
+++ b/apps/web/lib/pace/beatmap.ts
@@ -0,0 +1,53 @@
+// 爽点节拍图：把 pace.beat_map（int 序列）映射成 ▁▃▅ 风格的 sparkline 格子（UX §6.4）。
+// 纯逻辑，便于 node 环境单测；渲染时配合高度类与 prefers-reduced-motion。
+
+// 七级火花字符（低→高），与高度档位一一对应。
+export const SPARK_CHARS = ["▁", "▂", "▃", "▄", "▅", "▆", "▇"] as const;
+
+export interface BeatCell {
+  // 原始强度值。
+  value: number;
+  // 归一化档位 0..6（映射到 SPARK_CHARS / 高度百分比）。
+  level: number;
+  // 对应火花字符（▁..▇）。
+  char: string;
+  // 渲染用高度百分比（12%..100%，最低也可见）。
+  heightPct: number;
+}
+
+const MIN_HEIGHT_PCT = 12;
+const MAX_LEVEL = SPARK_CHARS.length - 1;
+
+// 把 beat_map 映射成可渲染的格子序列。
+// 归一化按「本序列 min..max」线性分桶到 0..6；全相等 → 全部居中档（level 3）。
+export function toBeatCells(beatMap: readonly number[]): BeatCell[] {
+  const values = beatMap.filter((v) => typeof v === "number" && Number.isFinite(v));
+  if (values.length === 0) return [];
+
+  const min = Math.min(...values);
+  const max = Math.max(...values);
+  const span = max - min;
+
+  return values.map((value) => {
+    const level =
+      span === 0
+        ? Math.round(MAX_LEVEL / 2)
+        : Math.round(((value - min) / span) * MAX_LEVEL);
+    const clamped = Math.min(MAX_LEVEL, Math.max(0, level));
+    const heightPct =
+      MIN_HEIGHT_PCT + (clamped / MAX_LEVEL) * (100 - MIN_HEIGHT_PCT);
+    return {
+      value,
+      level: clamped,
+      char: SPARK_CHARS[clamped] ?? SPARK_CHARS[0],
+      heightPct: Math.round(heightPct),
+    };
+  });
+}
+
+// 文本版 sparkline（无障碍/紧凑场景；UX §6.4 示例 ▁▃▅▂▁▇）。
+export function toSparkline(beatMap: readonly number[]): string {
+  return toBeatCells(beatMap)
+    .map((c) => c.char)
+    .join("");
+}
--- a/apps/web/lib/review/history.test.ts
+++ b/apps/web/lib/review/history.test.ts
@@ -1,7 +1,12 @@
 import { describe, expect, it } from "vitest";

 import type { ReviewHistoryItem } from "@/lib/api/types";
-import { latestReview, normalizeConflicts } from "./history";
+import {
+  latestReview,
+  normalizeConflicts,
+  normalizeForeshadowSug,
+  normalizePace,
+} from "./history";

 const item = (
  conflicts: Record<string, unknown>[],
@@ -43,6 +48,56 @@ describe("normalizeConflicts", () => {
  });
 });

+describe("normalizeForeshadowSug", () => {
+  it("tightens flat list with kind, defaulting kind to planted", () => {
+    const out = normalizeForeshadowSug({
+      ...item([]),
+      foreshadow_sug: [
+        { kind: "resolved", code: "F-012", title: "神秘玉佩", where: "第4段" },
+        { title: "残破地图" },
+      ],
+    });
+    expect(out).toEqual([
+      {
+        kind: "resolved",
+        code: "F-012",
+        title: "神秘玉佩",
+        where: "第4段",
+        note: null,
+      },
+      { kind: "planted", code: null, title: "残破地图", where: null, note: null },
+    ]);
+  });
+
+  it("returns [] when missing", () => {
+    expect(normalizeForeshadowSug(item([]))).toEqual([]);
+    expect(normalizeForeshadowSug(undefined)).toEqual([]);
+  });
+});
+
+describe("normalizePace", () => {
+  it("tightens dict into PaceReport, filtering bad water/beats", () => {
+    const out = normalizePace({
+      ...item([]),
+      pace: {
+        water: [{ where: "第3段", reason: "注水" }, "junk"],
+        hook: true,
+        beat_map: [1, 3, "x", 5],
+      },
+    });
+    expect(out).toEqual({
+      water: [{ where: "第3段", reason: "注水" }],
+      hook: true,
+      beat_map: [1, 3, 5],
+    });
+  });
+
+  it("returns null when pace is missing or not a dict", () => {
+    expect(normalizePace(item([]))).toBeNull();
+    expect(normalizePace(undefined)).toBeNull();
+  });
+});
+
 describe("latestReview", () => {
  it("returns first item (history is newest-first)", () => {
    const a = item([]);
--- a/apps/web/lib/review/history.ts
+++ b/apps/web/lib/review/history.ts
@@ -2,17 +2,32 @@
 // 纯逻辑（可单测）；schema 把 conflicts 标成 {[k]:unknown}[]，这里安全收窄。

 import type { ReviewHistoryItem } from "@/lib/api/types";
-import type { ReviewConflict } from "./sse";
+import type {
+  ForeshadowKind,
+  ForeshadowSuggestion,
+  PaceIssue,
+  PaceReport,
+  ReviewConflict,
+} from "./sse";

 function asString(v: unknown, fallback = ""): string {
  return typeof v === "string" ? v : fallback;
 }

+function asOptionalString(v: unknown): string | null {
+  return typeof v === "string" ? v : null;
+}
+
 function asStringArray(v: unknown): string[] {
  if (!Array.isArray(v)) return [];
  return v.filter((x): x is string => typeof x === "string");
 }

+function asIntArray(v: unknown): number[] {
+  if (!Array.isArray(v)) return [];
+  return v.filter((x): x is number => typeof x === "number" && Number.isFinite(x));
+}
+
 // 把一条留痕的 conflicts 收紧（缺字段给安全默认；保持顺序=下标身份，对齐冲突 gate）。
 export function normalizeConflicts(
  item: ReviewHistoryItem | undefined,
@@ -26,6 +41,46 @@ export function normalizeConflicts(
  }));
 }

+// 把一条留痕的 foreshadow_sug（扁平 list，每条带 kind）收紧成建议（缺字段给安全默认）。
+// 对齐 collect 列映射（C4 扩 T3.3）：planted/resolved 扁平成单 list、每条加 kind。
+export function normalizeForeshadowSug(
+  item: ReviewHistoryItem | undefined,
+): ForeshadowSuggestion[] {
+  const raw = item?.foreshadow_sug ?? [];
+  return raw.map((s) => ({
+    kind: asKind(s["kind"]),
+    code: asOptionalString(s["code"]),
+    title: asString(s["title"], "（未命名线索）"),
+    where: asOptionalString(s["where"]),
+    note: asOptionalString(s["note"]),
+  }));
+}
+
+function asKind(v: unknown): ForeshadowKind {
+  return v === "resolved" ? "resolved" : "planted";
+}
+
+// 把一条留痕的 pace（dict）收紧成节奏报告；缺失/非 dict → null（不渲染节拍图）。
+export function normalizePace(
+  item: ReviewHistoryItem | undefined,
+): PaceReport | null {
+  const raw = item?.pace;
+  if (typeof raw !== "object" || raw === null) return null;
+  const dict = raw as Record<string, unknown>;
+  const waterRaw = Array.isArray(dict["water"]) ? dict["water"] : [];
+  const water: PaceIssue[] = waterRaw
+    .filter((w): w is Record<string, unknown> => typeof w === "object" && w !== null)
+    .map((w) => ({
+      where: asString(w["where"]),
+      reason: asString(w["reason"]),
+    }));
+  return {
+    water,
+    hook: dict["hook"] === true,
+    beat_map: asIntArray(dict["beat_map"]),
+  };
+}
+
 // 最近一条留痕（GET .../reviews 已按新→旧排序）。
 export function latestReview(
  items: readonly ReviewHistoryItem[] | undefined,
--- a/apps/web/lib/review/sse.test.ts
+++ b/apps/web/lib/review/sse.test.ts
@@ -49,6 +49,35 @@ describe("parseReviewBlock", () => {
    });
  });

+  it("parses foreshadow and pace frames (C4 扩 T3.3)", () => {
+    expect(
+      parseReviewBlock(
+        'event:foreshadow\ndata:{"kind":"resolved","code":"F-012","title":"神秘玉佩","where":"第4段","note":"疑似回收"}',
+      ),
+    ).toEqual({
+      event: "foreshadow",
+      data: {
+        kind: "resolved",
+        code: "F-012",
+        title: "神秘玉佩",
+        where: "第4段",
+        note: "疑似回收",
+      },
+    });
+    expect(
+      parseReviewBlock(
+        'event:pace\ndata:{"water":[{"where":"第3段","reason":"注水"}],"hook":false,"beat_map":[1,3,5,2,1,7]}',
+      ),
+    ).toEqual({
+      event: "pace",
+      data: {
+        water: [{ where: "第3段", reason: "注水" }],
+        hook: false,
+        beat_map: [1, 3, 5, 2, 1, 7],
+      },
+    });
+  });
+
  it("returns null for unknown event or malformed json", () => {
    expect(parseReviewBlock('event:token\ndata:{"text":"x"}')).toBeNull();
    expect(parseReviewBlock("event:conflict\ndata:{not json")).toBeNull();
@@ -107,6 +136,39 @@ describe("reduceReview", () => {
    ]);
  });

+  it("accumulates foreshadow suggestions and replaces pace report (last wins)", () => {
+    const events: ReviewSseEvent[] = [
+      {
+        event: "foreshadow",
+        data: { kind: "planted", title: "残破地图", where: "第5段" },
+      },
+      {
+        event: "foreshadow",
+        data: { kind: "resolved", code: "F-012", title: "神秘玉佩" },
+      },
+      {
+        event: "pace",
+        data: { water: [], hook: true, beat_map: [1, 2, 3] },
+      },
+      {
+        event: "pace",
+        data: {
+          water: [{ where: "第3段", reason: "注水" }],
+          hook: false,
+          beat_map: [3, 1, 5],
+        },
+      },
+    ];
+    const state = events.reduce(reduceReview, initialReviewState);
+    expect(state.foreshadow.map((f) => f.kind)).toEqual([
+      "planted",
+      "resolved",
+    ]);
+    expect(state.pace?.hook).toBe(false);
+    expect(state.pace?.beat_map).toEqual([3, 1, 5]);
+    expect(state.phase).toBe("reviewing");
+  });
+
  it("marks done and captures error preserving collected data", () => {
    let s = reduceReview(initialReviewState, {
      event: "section",
--- a/apps/web/lib/review/sse.ts
+++ b/apps/web/lib/review/sse.ts
@@ -19,6 +19,29 @@ export interface ReviewConflict {

 export type SectionStatus = "started" | "done" | "incomplete";

+// 伏笔建议（C4 扩 T3.3）：planted=新埋待确认 / resolved=疑似回收（只读建议）。
+export type ForeshadowKind = "planted" | "resolved";
+
+export interface ForeshadowSuggestion {
+  kind: ForeshadowKind;
+  code?: string | null;
+  title: string;
+  where?: string | null;
+  note?: string | null;
+}
+
+// 节奏报告（C4 扩 T3.3）：注水段 + 章末钩子 + 爽点节拍图。
+export interface PaceIssue {
+  where: string;
+  reason: string;
+}
+
+export interface PaceReport {
+  water: PaceIssue[];
+  hook: boolean;
+  beat_map: number[];
+}
+
 export interface SectionEvent {
  event: "section";
  data: { name: string; status: SectionStatus };
@@ -27,6 +50,24 @@ export interface ConflictEvent {
  event: "conflict";
  data: ReviewConflict;
 }
+export interface ForeshadowEvent {
+  event: "foreshadow";
+  data: {
+    kind: ForeshadowKind;
+    code?: string | null;
+    title: string;
+    where?: string | null;
+    note?: string | null;
+  };
+}
+export interface PaceEvent {
+  event: "pace";
+  data: {
+    water: PaceIssue[];
+    hook: boolean;
+    beat_map: number[];
+  };
+}
 export interface DoneEvent {
  event: "done";
  data: { length: number };
@@ -38,10 +79,19 @@ export interface ErrorEvent {
 export type ReviewSseEvent =
  | SectionEvent
  | ConflictEvent
+  | ForeshadowEvent
+  | PaceEvent
  | DoneEvent
  | ErrorEvent;

-const KNOWN_EVENTS = new Set(["section", "conflict", "done", "error"]);
+const KNOWN_EVENTS = new Set([
+  "section",
+  "conflict",
+  "foreshadow",
+  "pace",
+  "done",
+  "error",
+]);

 // 把一个完整 SSE 块（多行）解析成事件；无法解析则返回 null（跳过）。
 export function parseReviewBlock(block: string): ReviewSseEvent | null {
@@ -108,6 +158,8 @@ export interface ReviewStreamState {
  phase: ReviewPhase;
  sections: ReviewSection[];
  conflicts: ReviewConflict[];
+  foreshadow: ForeshadowSuggestion[];
+  pace: PaceReport | null;
  error: { code: string; message: string; request_id?: string | null } | null;
 }

@@ -115,6 +167,8 @@ export const initialReviewState: ReviewStreamState = {
  phase: "idle",
  sections: [],
  conflicts: [],
+  foreshadow: [],
+  pace: null,
  error: null,
 };

@@ -136,6 +190,18 @@ export function reduceReview(
        phase: "reviewing",
        conflicts: [...state.conflicts, event.data],
      };
+    case "foreshadow":
+      return {
+        ...state,
+        phase: "reviewing",
+        foreshadow: [...state.foreshadow, { ...event.data }],
+      };
+    case "pace":
+      return {
+        ...state,
+        phase: "reviewing",
+        pace: { ...event.data },
+      };
    case "done":
      return { ...state, phase: "done" };
    case "error":
--- a/apps/web/lib/review/useReviewStream.ts
+++ b/apps/web/lib/review/useReviewStream.ts
@@ -7,16 +7,24 @@ import {
  ReviewFrameBuffer,
  initialReviewState,
  reduceReview,
+  type ForeshadowSuggestion,
+  type PaceReport,
  type ReviewConflict,
  type ReviewStreamState,
 } from "./sse";

+export interface ReviewSeed {
+  conflicts: ReviewConflict[];
+  foreshadow: ForeshadowSuggestion[];
+  pace: PaceReport | null;
+}
+
 type Action =
  | { type: "start" }
  | { type: "events"; events: ReturnType<ReviewFrameBuffer["push"]> }
  | { type: "abort" }
  | { type: "fail"; code: string; message: string }
-  | { type: "seed"; conflicts: ReviewConflict[] };
+  | { type: "seed"; seed: ReviewSeed };

 function reducer(state: ReviewStreamState, action: Action): ReviewStreamState {
  switch (action.type) {
@@ -33,7 +41,12 @@ function reducer(state: ReviewStreamState, action: Action): ReviewStreamState {
        error: { code: action.code, message: action.message },
      };
    case "seed":
-      return { ...initialReviewState, conflicts: action.conflicts };
+      return {
+        ...initialReviewState,
+        conflicts: action.seed.conflicts,
+        foreshadow: action.seed.foreshadow,
+        pace: action.seed.pace,
+      };
    default:
      return state;
  }
@@ -45,8 +58,8 @@ export interface UseReviewStream {
  // 用当前编辑器草稿重新审稿。
  start: (projectId: string, chapterNo: number, draft: string) => Promise<void>;
  stop: () => void;
-  // 进页用历史留痕的冲突种入（无需重审即可裁决）。
-  seed: (conflicts: ReviewConflict[]) => void;
+  // 进页用历史留痕（冲突 + 伏笔建议 + 节奏）种入（无需重审即可裁决/查看）。
+  seed: (seed: ReviewSeed) => void;
 }

 // 消费 POST .../review 的 SSE 流：fetch+ReadableStream（EventSource 不支持 POST）。
@@ -62,8 +75,8 @@ export function useReviewStream(): UseReviewStream {
    dispatch({ type: "abort" });
  }, []);

-  const seed = useCallback((conflicts: ReviewConflict[]) => {
-    dispatch({ type: "seed", conflicts });
+  const seed = useCallback((seedData: ReviewSeed) => {
+    dispatch({ type: "seed", seed: seedData });
  }, []);

  const start = useCallback(
--- a/apps/web/tsconfig.tsbuildinfo
+++ b/apps/web/tsconfig.tsbuildinfo