test(qa): F1/F2/F3 E2E — 拆书入 rules / 续写式链前文注入 / 模板库 CRUD

- F1: teardown generate→ingest→rules 真落行 + 负向预览不写库（不变量 #3）
- F2: continue_volume 两章第二章写章请求含第一章 accepted 正文（前文注入）+ draft_volume 回归守卫
- F3: templates POST→GET→DELETE 真 pg 回环 + title/body 空→422

真 pg + mock 网关零 token，镜像现有 tests/test_*_e2e.py 范式

tests/test_templates_e2e.py

@@ -0,0 +1,137 @@
+"""F3 提示词/模板库 端到端（真 pg；无网关——模板库不调 LLM）。
+
+证明单用户本地模板库 CRUD 闭环：创建→列出→删除真 pg 回环 + 输入校验（title/body 空 → 422）。
+owner_id 全程 stub（单用户原型）。无 pg → skip。
+
+镜像现有 `tests/test_*_e2e.py` 范式：真 `get_sessionmaker`（无 pg skip）+ `LifespanManager` +
+`ASGITransport`，DB 真源逐项断言。模板库不触达 LLM 网关，故无需 mock 适配器。
+"""
+
+from __future__ import annotations
+
+import uuid
+from collections.abc import AsyncIterator
+
+import httpx
+import pytest
+from asgi_lifespan import LifespanManager
+from sqlalchemy import delete, select
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
+from ww_db import get_sessionmaker
+from ww_db.models import PromptTemplate
+
+
+@pytest.fixture
+async def e2e_sm() -> AsyncIterator[async_sessionmaker[AsyncSession]]:
+    """真 DB session 工厂；无 pg 时跳过（每测试清缓存重建 engine、结束 dispose）。"""
+    get_sessionmaker.cache_clear()
+    maker = get_sessionmaker()
+    try:
+        async with maker() as probe:
+            await probe.execute(select(1))
+    except Exception:
+        pytest.skip("postgres not reachable")
+    yield maker
+    await maker.kw["bind"].dispose()
+    get_sessionmaker.cache_clear()
+
+
+async def _cleanup(sm: async_sessionmaker[AsyncSession], ids: list[uuid.UUID]) -> None:
+    if not ids:
+        return
+    async with sm() as cleanup:
+        await cleanup.execute(delete(PromptTemplate).where(PromptTemplate.id.in_(ids)))
+        await cleanup.commit()
+
+
+async def _template_count(sm: async_sessionmaker[AsyncSession], template_id: uuid.UUID) -> int:
+    async with sm() as s:
+        return len(
+            (await s.execute(select(PromptTemplate).where(PromptTemplate.id == template_id)))
+            .scalars()
+            .all()
+        )
+
+
+async def test_templates_create_list_delete_roundtrip(
+    e2e_sm: async_sessionmaker[AsyncSession],
+) -> None:
+    """用例 1：POST → GET → DELETE 真 pg 回环（行真落 pg；删除后表无行）。"""
+    from ww_api.main import create_app
+
+    app = create_app()
+    transport = httpx.ASGITransport(app=app)
+    created_id: uuid.UUID | None = None
+    try:
+        async with LifespanManager(app):
+            async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
+                # 1) POST → 201，模板真落 pg。
+                create_resp = await client.post(
+                    "/templates",
+                    json={
+                        "title": "玄幻开篇模板",
+                        "body": "请按照黄金三章节奏，开篇即上钩……",
+                        "category": "开篇",
+                        "tool_key": "opening",
+                    },
+                )
+                assert create_resp.status_code == 201, create_resp.text
+                created = create_resp.json()
+                assert created["title"] == "玄幻开篇模板"
+                assert created["body"] == "请按照黄金三章节奏，开篇即上钩……"
+                assert created["category"] == "开篇"
+                assert created["tool_key"] == "opening"
+                created_id = uuid.UUID(created["id"])
+
+                # DB 真源：模板行真落 pg（owner stub）。
+                assert await _template_count(e2e_sm, created_id) == 1
+
+                # 2) GET → 列表含刚建模板。
+                list_resp = await client.get("/templates")
+                assert list_resp.status_code == 200
+                listed = list_resp.json()
+                assert created["id"] in [t["id"] for t in listed]
+                mine = next(t for t in listed if t["id"] == created["id"])
+                assert mine["title"] == "玄幻开篇模板"
+                assert mine["body"] == "请按照黄金三章节奏，开篇即上钩……"
+
+                # 3) DELETE → 204；DB 真源行被删。
+                del_resp = await client.delete(f"/templates/{created['id']}")
+                assert del_resp.status_code == 204
+                assert await _template_count(e2e_sm, created_id) == 0
+
+                # 删除后再列出不含该模板。
+                after = (await client.get("/templates")).json()
+                assert created["id"] not in [t["id"] for t in after]
+
+                # 4) 删除不存在 → 404 NOT_FOUND envelope。
+                missing = await client.delete(f"/templates/{uuid.uuid4()}")
+                assert missing.status_code == 404
+                assert missing.json()["error"]["code"] == "NOT_FOUND"
+    finally:
+        if created_id is not None:
+            await _cleanup(e2e_sm, [created_id])
+
+
+async def test_templates_create_blank_title_returns_422(
+    e2e_sm: async_sessionmaker[AsyncSession],
+) -> None:
+    """用例 2：title 空 → 422（schema min_length=1）；DB 无行落库。"""
+    from ww_api.main import create_app
+
+    app = create_app()
+    transport = httpx.ASGITransport(app=app)
+    async with LifespanManager(app):
+        async with httpx.AsyncClient(transport=transport, base_url="http://test") as client:
+            before = len((await client.get("/templates")).json())
+
+            resp = await client.post("/templates", json={"title": "", "body": "非空正文"})
+            assert resp.status_code == 422, resp.text
+
+            # body 空亦 422（守输入校验纪律）。
+            resp_body = await client.post("/templates", json={"title": "有标题", "body": ""})
+            assert resp_body.status_code == 422
+
+            # 两次 422 均未落库（列表数量不变）。
+            after = len((await client.get("/templates")).json())
+            assert after == before