重组为 backend/clients/docs 三层结构，并清理 git 污染。

将后端迁入 backend/，完善根目录 .gitignore，删除误提交的 .mypy_cache 缓存文件。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_surgery_repository.py

@@ -0,0 +1,127 @@
+from __future__ import annotations
+
+from datetime import datetime, timezone
+
+import pytest
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+import app.db.models  # noqa: F401
+from app.db.base import Base
+from app.db.models import SurgeryResultDetailRow
+from app.domain.consumption import SurgeryConsumptionStored
+from app.repositories.surgery_results import SurgeryResultRepository
+
+
+@pytest.fixture
+async def db_session() -> AsyncSession:
+    engine = create_async_engine("sqlite+aiosqlite:///:memory:")
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+    factory = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+    session = factory()
+    yield session
+    await session.close()
+    await engine.dispose()
+
+
+@pytest.mark.asyncio
+async def test_save_empty_then_load(db_session: AsyncSession) -> None:
+    repo = SurgeryResultRepository()
+    async with db_session.begin():
+        await repo.save_final_result(db_session, surgery_id="123456", details=[])
+    async with db_session.begin():
+        loaded = await repo.load_final_details(db_session, "123456")
+    assert loaded == []
+
+
+@pytest.mark.asyncio
+async def test_save_roundtrip(db_session: AsyncSession) -> None:
+    repo = SurgeryResultRepository()
+    ts = datetime(2026, 4, 21, 10, 0, tzinfo=timezone.utc)
+    details = [
+        SurgeryConsumptionStored(
+            item_id="纱布",
+            item_name="纱布",
+            qty=1,
+            doctor_id="D1",
+            timestamp=ts,
+            source="vision",
+        ),
+        SurgeryConsumptionStored(
+            item_id="纱布",
+            item_name="纱布",
+            qty=1,
+            doctor_id="voice",
+            timestamp=ts,
+            source="voice",
+        ),
+    ]
+    async with db_session.begin():
+        await repo.save_final_result(db_session, surgery_id="654321", details=details)
+    async with db_session.begin():
+        loaded = await repo.load_final_details(db_session, "654321")
+    assert loaded is not None
+    assert len(loaded) == 2
+    assert loaded[0].qty == 1 and loaded[0].item_id == "纱布"
+    assert loaded[1].qty == 1
+    async with db_session.begin():
+        res = await db_session.execute(
+            select(SurgeryResultDetailRow)
+            .where(SurgeryResultDetailRow.surgery_id == "654321")
+            .order_by(SurgeryResultDetailRow.id)
+        )
+        orm_rows = res.scalars().all()
+    assert orm_rows[0].source == "vision"
+    assert orm_rows[1].source == "voice"
+
+
+@pytest.mark.asyncio
+async def test_missing_surgery_returns_none(db_session: AsyncSession) -> None:
+    repo = SurgeryResultRepository()
+    async with db_session.begin():
+        missing = await repo.load_final_details(db_session, "000000")
+    assert missing is None
+
+
+@pytest.mark.asyncio
+async def test_save_overwrites_previous_final_result(db_session: AsyncSession) -> None:
+    repo = SurgeryResultRepository()
+    ts1 = datetime(2026, 4, 21, 9, 0, tzinfo=timezone.utc)
+    ts2 = datetime(2026, 4, 21, 10, 0, tzinfo=timezone.utc)
+    async with db_session.begin():
+        await repo.save_final_result(
+            db_session,
+            surgery_id="888888",
+            details=[
+                SurgeryConsumptionStored(
+                    item_id="旧",
+                    item_name="旧",
+                    qty=1,
+                    doctor_id="D1",
+                    timestamp=ts1,
+                    source="vision",
+                ),
+            ],
+        )
+    async with db_session.begin():
+        await repo.save_final_result(
+            db_session,
+            surgery_id="888888",
+            details=[
+                SurgeryConsumptionStored(
+                    item_id="新",
+                    item_name="新",
+                    qty=2,
+                    doctor_id="D2",
+                    timestamp=ts2,
+                    source="voice",
+                ),
+            ],
+        )
+    async with db_session.begin():
+        loaded = await repo.load_final_details(db_session, "888888")
+    assert loaded is not None
+    assert len(loaded) == 1
+    assert loaded[0].item_id == "新"
+    assert loaded[0].qty == 2