style(backend): ruff format 统一此前批次的排版残留

纯排版无行为变化（ruff format 重排 7 个此前批次的文件），
涉及模块集成回归全绿（67 passed）。

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

backend/app/api/v1/business/shipments.py

@@ -50,9 +50,7 @@ def create_shipment(
     )
 
 
-@router.get(
-    "/{shipment_id}", response_model=ApiResponse[ShipmentDetailOut], summary="发货单详情"
-)
+@router.get("/{shipment_id}", response_model=ApiResponse[ShipmentDetailOut], summary="发货单详情")
 def get_shipment(
     session: DbSession,
     _: CurrentUser,

backend/app/repositories/customer_repository.py

@@ -29,9 +29,7 @@ def count_business_refs(session: Session, customer_id: int) -> int:
 
     return int(
         session.execute(
-            select(func.count())
-            .select_from(Business)
-            .where(Business.customer_id == customer_id)
+            select(func.count()).select_from(Business).where(Business.customer_id == customer_id)
         ).scalar_one()
     )
 

backend/app/repositories/receipt_repository.py

@@ -88,9 +88,7 @@ def list_receipts(
         is_barter=is_barter,
         settlement_status=settlement_status,
     )
-    return list(
-        session.execute(stmt.order_by(Receipt.id.desc()).offset(offset).limit(limit)).all()
-    )
+    return list(session.execute(stmt.order_by(Receipt.id.desc()).offset(offset).limit(limit)).all())
 
 
 def count_receipts(

backend/app/repositories/shipment_repository.py

@@ -59,9 +59,7 @@ def list_shipments(
 ) -> list[tuple[Shipment, str]]:
     """分页查询发货单（附业务号），按 id 倒序。"""
     stmt = _apply_filters(
-        select(Shipment, Business.business_no).join(
-            Business, Business.id == Shipment.business_id
-        ),
+        select(Shipment, Business.business_no).join(Business, Business.id == Shipment.business_id),
         business_id=business_id,
         ship_date_from=ship_date_from,
         ship_date_to=ship_date_to,

backend/app/schemas/receipt.py

@@ -30,9 +30,7 @@ class ReceiptCreateIn(BaseModel):
     model_config = ConfigDict(str_strip_whitespace=True)
 
     business_id: int = Field(ge=1, description="业务ID")
-    shipment_id: int | None = Field(
-        default=None, ge=1, description="发货单ID，可空=暂未指定"
-    )
+    shipment_id: int | None = Field(default=None, ge=1, description="发货单ID，可空=暂未指定")
     receipt_date: date = Field(description="回款到账日（M3 按此日匹配参数版本）")
     amount: str = Field(description="回款金额（元），≥0，最多两位小数")
     is_barter: int = Field(default=0, ge=0, le=1, description="以物抵顶标记：1是 0否")