fix: drag block issue (#9902)

### Changed
- Added support for changing the preview offset during dragging.
- Fixed the preview rendering for embed block and surface-ref block
- Resolved an issue where the host element might be reused in certain cases, which could cause unexpected behavior
- Moved viewport-related constants and methods to a more appropriate location

blocksuite/affine/data-view/src/view-presets/table/stats/column-stats-column.ts

@@ -211,6 +211,7 @@ export class DatabaseColumnStatsCell extends SignalWatcher(
       this.subscriptionMap.forEach(unsub => {
         unsub();
       });
+      this.subscriptionMap.clear();
     });
   }