fix: 修复or_局部导入遮蔽模块级导入导致UnboundLocalError + Drawer改用size

1. product_service.py: 删除函数内两处 from sqlalchemy import or_
   Python解析器看到函数内的import就把or_当局部变量, 在赋值前使用就报UnboundLocalError
   模块顶部已有 import or_, 函数内无需重复导入

2. AdminDashboard.tsx: Drawer width→size (Antd v6 deprecation)

backend/app/services/product_service.py

@@ -289,7 +289,6 @@ async def update_overall_status(
     # SUPER_ADMIN 直接放行
     if user_role != "SUPER_ADMIN":
         # 检查当前用户是否是该产品主线任务的负责人
-        from sqlalchemy import or_
         main_task_result = await db.execute(
             select(Task).where(
                 Task.product_id == product.id,
@@ -416,7 +415,7 @@ async def get_all_products(
     overall_names: dict[uuid.UUID, str] = {}
     main_assignees: dict[uuid.UUID, str] = {}
     if product_ids:
-        from sqlalchemy import and_, or_, func as sa_func, case as sa_case
+        from sqlalchemy import and_, func as sa_func, case as sa_case
         main_where = and_(
             Task.product_id.in_(product_ids),
             or_(