feat(crm): align product export with ListExportDropdown

Add ids/columns support and unify toolbar export UX.

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

backend/app/api/crm.py

@@ -31,7 +31,12 @@ from app.utils.crm_export_columns import (
     PRODUCT_EXPORT_COLUMNS,
     SUPPLIER_INFO_EXPORT_COLUMNS,
 )
-from app.utils.excel_export import export_rows_to_xlsx_response
+from app.utils.excel_export import (
+    EXPORT_MAX_ROWS,
+    ExportValidationError,
+    export_rows_to_xlsx_response,
+    filter_export_columns,
+)
 from app.crud.crm.product import (
     _category_row_to_dict,
     create_category,
@@ -871,6 +876,12 @@ def product_import(
         return error_response(500, str(e))
 
 
+def _map_product_export_column_keys(requested: List[str]) -> List[str]:
+    """前端列表 prop → 导出列 field（如 cost → costPrice）。"""
+    alias = {"cost": "costPrice"}
+    return [alias.get(str(key), str(key)) for key in requested]
+
+
 @router.post("/products/export")
 def product_export(
     body: ProductListBody,
@@ -885,23 +896,32 @@ def product_export(
             db,
             tenant_no,
             page=1,
-            page_size=10000,
+            page_size=EXPORT_MAX_ROWS,
+            max_page_size=EXPORT_MAX_ROWS,
             keyword=body.keyword,
             category_id=body.category_id,
             status=body.status,
             supplier_id=body.supplier_id,
+            ids=body.ids,
+            user_info=user_info,
             match_product_no=True if body.match_product_no is None else bool(body.match_product_no),
             match_model=bool(body.match_model) if body.match_model is not None else False,
         )
+        export_cols = filter_export_columns(
+            PRODUCT_EXPORT_COLUMNS,
+            _map_product_export_column_keys(body.columns) if body.columns else None,
+        )
         date_str = datetime.now().strftime("%Y%m%d")
         return export_rows_to_xlsx_response(
             db,
             tenant_no=tenant_no,
             sheet_title="产品列表",
-            columns=PRODUCT_EXPORT_COLUMNS,
+            columns=export_cols,
             rows=rows,
             filename_stem=f"产品列表_{date_str}",
         )
+    except ExportValidationError as e:
+        return error_response(400, str(e))
     except ValueError as e:
         return error_response(400, str(e))
     except Exception as e: