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/framework/block-std/src/gfx/view/view-manager.ts

@@ -60,9 +60,12 @@ export class ViewManager extends GfxExtension {
       this._disposable.add(
         surface.elementAdded.on(payload => {
           const model = surface.getElementById(payload.id)!;
-          const View = this._viewCtorMap.get(model.type) ?? GfxElementModelView;
+          const ViewCtor =
+            this._viewCtorMap.get(model.type) ?? GfxElementModelView;
+          const view = new ViewCtor(model, this.gfx);
 
-          this._viewMap.set(model.id, new View(model, this.gfx));
+          this._viewMap.set(model.id, view);
+          view.onCreated();
         })
       );
 

blocksuite/framework/block-std/src/gfx/view/view.ts

@@ -72,7 +72,6 @@ export class GfxElementModelView<
     readonly gfx: GfxController
   ) {
     this.model = model;
-    this.onCreated();
   }
 
   static setup(di: Container): void {