feat: enhance table layout and interaction across various components

- Introduced a new `WorkspaceTable` component for consistent table styling and behavior.
- Updated `BacktestPage`, `DatasetPage`, and `DataPreparationPage` to utilize the new `WorkspaceTable`.
- Implemented compact row heights and ellipsis for long text in table cells.
- Added validation for online field queries to ensure at least one filter is provided.
- Enhanced error handling and user feedback for invalid input scenarios.
- Improved pagination controls with dynamic page size options.
- Documented table display specifications in `ui-tables.md`.
- Added tests to verify table layout, interaction, and error handling.

backend/app/preparations/service.py

@@ -136,6 +136,16 @@ class Preparations:
         )
 
     async def online_fields(self, filters):
+        text_filters = (filters.q, filters.dataset_id, filters.field_type)
+        numeric_filters = (
+            filters.coverage_min, filters.coverage_max,
+            filters.user_count_min, filters.user_count_max,
+            filters.alpha_count_min, filters.alpha_count_max,
+        )
+        if not any(value and value.strip() for value in text_filters) and not any(
+            value is not None for value in numeric_filters
+        ):
+            raise HTTPException(422, "在线查询至少需要关键词、数据集、类型或数值筛选条件")
         if self.client is None:
             raise HTTPException(409, "请先连接 WorldQuant")
         params = dict(