Revert "feat: 客户管理新增个人用户类型，双Tab分离管理"

This reverts commit 03198557f7.

backend/app/api/customers.py

@@ -50,7 +50,6 @@ async def list_customers(
     industry: Optional[str] = Query(None),
     service: Optional[str] = Query(None),
     manager_id: Optional[str] = Query(None),
-    customer_type: Optional[str] = Query(None),
     page: int = Query(1, ge=1),
     page_size: int = Query(100, ge=1, le=1000),
     current_user: dict = Depends(get_current_user),
@@ -61,8 +60,6 @@ async def list_customers(
 
     base_query = select(Customer)
 
-    if customer_type:
-        base_query = base_query.where(Customer.customer_type == customer_type)
     if industry:
         base_query = base_query.where(Customer.industry.ilike(f"%{industry}%"))
     if service:
@@ -92,7 +89,7 @@ async def list_customers(
 
     # Paginate
     offset = (page - 1) * page_size
-    query = base_query.order_by(Customer.customer_type, Customer.name).offset(offset).limit(page_size)
+    query = base_query.order_by(Customer.name).offset(offset).limit(page_size)
     result = await db.execute(query)
     items = result.scalars().all()