fix(qa): 实施 4 组设计型 QA 项——规则删除/codex 角色/大纲卷过滤/文风回炉锚点

#5 规则 DELETE + id：暴露 RuleView.id（PK）；新增 DELETE /projects/{id}/rules/{rule_id}
  （项目/规则不存在→404，成功→204，按 (id,project_id) 限定）；rule_repo 加
  list_for_project/delete；RulesPage 每条加删除（乐观删+回滚+toast）。assemble 侧
  RuleView（缓存前缀）不动，列表另立 RuleListItemView。
#7 codex 角色 relations：写侧本已持久化、读端点 _existing_characters 硬编码 []。
  加 _relations_from_jsonb 解析 {name,kind,note}，CodexPage 渲染关系 chip。
#8 角色入库幂等：SqlCharacterWriteRepo.create 改 (project_id,name) app 层 upsert——
  重复入库改更新而非插入；不加 UNIQUE/迁移（线上已有重复行会让约束迁移失败）。
#1 大纲卷过滤：GET /outline 支持可选 ?volume（无参=全部，向后兼容）；OutlineEditor
  加「查看：全部/卷N」筛选，与生成目标卷解耦。
H3/#9 文风回炉锚点：StyleDriftSegment 加 text（逐字命中段），style.md 指示审稿输出；
  前端按内容锚点定位回炉目标（idx 仅排序），命中失败 → 提示「无法定位该段」而非
  静默 no-op。style golden fixture 已重生成。

契约变更已 pnpm gen:api（RuleView.id / DELETE rules / outline ?volume）。无迁移
（alembic 无漂移）。门禁绿：ruff/mypy(210)/alembic/pytest 760 · 前端 tsc/lint/vitest 329。

apps/api/tests/test_rules.py

@@ -17,7 +17,7 @@ from cryptography.fernet import Fernet
 from fakes_projects import FakeProjectRepo, FakeSession
 from ww_api.services.credentials import STUB_OWNER_ID
 from ww_core.domain.project_repo import ProjectView
-from ww_core.domain.rule_repo import RuleWriteView
+from ww_core.domain.rule_repo import RuleListItemView, RuleWriteView
 
 
 class _FakeRuleWriteRepo:
@@ -25,10 +25,22 @@ class _FakeRuleWriteRepo:
         self.rows: list[RuleWriteView] = []
 
     async def create(self, project_id: uuid.UUID, *, level: str, content: str) -> RuleWriteView:
-        view = RuleWriteView(project_id=project_id, level=level, content=content)
+        view = RuleWriteView(id=uuid.uuid4(), project_id=project_id, level=level, content=content)
         self.rows.append(view)
         return view
 
+    async def list_for_project(self, project_id: uuid.UUID) -> list[RuleListItemView]:
+        return [
+            RuleListItemView(id=r.id, level=r.level, content=r.content)
+            for r in self.rows
+            if r.project_id in (project_id, None)
+        ]
+
+    async def delete(self, project_id: uuid.UUID, rule_id: uuid.UUID) -> bool:
+        before = len(self.rows)
+        self.rows = [r for r in self.rows if not (r.id == rule_id and r.project_id == project_id)]
+        return len(self.rows) < before
+
 
 def _make_client() -> tuple[
     httpx.AsyncClient, _FakeRuleWriteRepo, FakeSession, FakeProjectRepo, uuid.UUID
@@ -72,6 +84,8 @@ async def test_create_rule_returns_201_and_commits() -> None:
     body = resp.json()
     assert body["level"] == "project"
     assert body["content"] == "主角不许中途复活"
+    # 创建回显带 id（前端删除 handle）。
+    assert body["id"] == str(repo.rows[0].id)
     assert session.commits == 1
     assert len(repo.rows) == 1
     assert repo.rows[0].project_id == pid
@@ -124,3 +138,37 @@ async def test_create_rule_unknown_project_returns_404() -> None:
     assert resp.status_code == 404
     assert resp.json()["error"]["code"] == "NOT_FOUND"
     assert len(repo.rows) == 0  # 未触达写库
+
+
+@pytest.mark.asyncio
+async def test_delete_rule_returns_204_and_commits() -> None:
+    # 作者显式删一条本作品规则（不变量 #3）：204 + 端点提交 + 行被移除。
+    client, repo, session, _project_repo, pid = _make_client()
+    seeded = await repo.create(pid, level="project", content="待删规则")
+    async with client:
+        resp = await client.delete(f"/projects/{pid}/rules/{seeded.id}")
+    assert resp.status_code == 204
+    assert session.commits == 1
+    assert len(repo.rows) == 0
+
+
+@pytest.mark.asyncio
+async def test_delete_rule_unknown_rule_returns_404() -> None:
+    # 未知 rule_id → 404；不提交（删不到行）。
+    client, repo, session, _project_repo, pid = _make_client()
+    async with client:
+        resp = await client.delete(f"/projects/{pid}/rules/{uuid.uuid4()}")
+    assert resp.status_code == 404
+    assert resp.json()["error"]["code"] == "NOT_FOUND"
+    assert session.commits == 0
+
+
+@pytest.mark.asyncio
+async def test_delete_rule_unknown_project_returns_404() -> None:
+    # 项目不存在 → 404（先于 rule 查校验），不触达删除。
+    client, repo, session, _project_repo, _pid = _make_client()
+    async with client:
+        resp = await client.delete(f"/projects/{uuid.uuid4()}/rules/{uuid.uuid4()}")
+    assert resp.status_code == 404
+    assert resp.json()["error"]["code"] == "NOT_FOUND"
+    assert session.commits == 0