use interactive name as saved ipynb name

Author: amunger

src/vs/workbench/contrib/interactive/browser/interactive.contribution.ts

@@ -396,7 +396,7 @@ registerAction2(class extends Action2 {
 			counter++;
 		} while (existingNotebookDocument.has(notebookUri.toString()));
 
-		logService.info('Open new interactive window:', notebookUri.toString(), inputUri.toString());
+		logService.debug('Open new interactive window:', notebookUri.toString(), inputUri.toString());
 
 		if (id) {
 			const allKernels = kernelService.getMatchingKernel({ uri: notebookUri, viewType: 'interactive' }).all;

src/vs/workbench/contrib/interactive/browser/interactiveEditorInput.ts

@@ -187,6 +187,7 @@ export class InteractiveEditorInput extends EditorInput implements ICompositeNot
 			return undefined;
 		}
 
+		const filename = this.getName() + '.ipynb';
 		const pathCandidate = joinPath(await this._fileDialogService.defaultFilePath(), 'scratch.ipynb');
 
 		const target = await this._fileDialogService.pickFileToSave(pathCandidate, options?.availableFileSystems);