[BUG] All the extensions are displayed under the 'Explorer' in Antigravity.

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

All the extensions are displayed under the 'Explorer'.

What Should Happen?

extensions should display in siderbar.

Error Messages/Logs

Anthropic.claude-code: Error: Extension 'Anthropic.claude-code' CANNOT use API proposal: contribSecondarySidebar.
Its package.json#enabledApiProposals-property declares: [] but NOT contribSecondarySidebar.
The missing proposal MUST be added and you must start in extension development mode or use the following command line switch: --enable-proposed-api Anthropic.claude-code
at _Te (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:3310:19242)
at vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:3621:72499
at Array.forEach (<anonymous>)
at rvi.i (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:3621:72298)
at WVa.a (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:3621:71835)
at WVa.d (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:3307:53993)
at WVa.acceptUsers (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:3307:53926)
at ins.Lb (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:6838:5711)
at dns.Ib (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:6838:4741)
at dns.mb (vscode-file://vscode-app/Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:6837:19934)
error @ workbench.desktop.main.js:2797
workbench.desktop.main.js:2797 WARN [Anthropic.claude-code]: View container 'claude-sidebar-secondary' does not exist. All views registered to it will be added to 'Explorer'.
warn @ workbench.desktop.main.js:2797
workbench.desktop.main.js:2797 WARN [apollographql.vscode-apollo]: View container 'client-devtools' does not exist. All views registered to it will be added to 'Explorer'.
warn @ workbench.desktop.main.js:2797
workbench.desktop.main.js:2797 WARN [Dart-Code.dart-code]: View container 'flutter' does not exist. All views registered to it will be added to 'Explorer'.
warn @ workbench.desktop.main.js:2797
workbench.desktop.main.js:2797 WARN [Dart-Code.dart-code]: View container 'flutterPropertyEditorContainer' does not exist. All views registered to it will be added to 'Explorer'.
warn @ workbench.desktop.main.js:2797
workbench.desktop.main.js:2797 WARN [Dart-Code.dart-code]: View container 'sidebarDevToolsContainer' does not exist. All views registered to it will be added to 'Explorer'.
warn @ workbench.desktop.main.js:2797
workbench.desktop.main.js:2797 WARN [Dart-Code.dart-code]: View container 'sidebarDevToolsInspectorContainer' does not exist. All views registered to it will be added to 'Explorer'.

Steps to Reproduce

1, install 2.0.70
2, open a new project with Antigravity

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.62

Claude Code Version

2.0.70

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_