[BUG] Remote Control: bridge URL redirects to dashboard instead of showing active session

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?

Description

When using the Remote Control feature from VS Code extension, the QR code is generated and the terminal shows "Connected" and "Attached" status. However, accessing the bridge URL on iPhone (both Safari and Chrome) only shows the Claude Code dashboard — the active session is not displayed.

Steps to reproduce

1. Start Claude Code in VS Code terminal (v2.1.90)
2. QR code and bridge URL are generated (e.g., claude.ai/code?bridge=env_...)
3. Scan QR code or manually enter bridge URL on iPhone
4. Expected: See the active session with real-time progress
5. Actual: Redirected to Claude Code dashboard (showing "新規セッション" and past sessions only)

Environment

• Claude Code: v2.1.90
• macOS Darwin 25.3.0
• VS Code extension
• iPhone (Safari & Chrome tested)
• Claude Code web shows "リサーチプレビュー" label

What Should Happen?

The active VS Code session should appear on the phone with real-time progress, tool calls, and approval buttons visible.

Error Messages/Logs

No error messages. The bridge URL silently redirects to the Claude Code dashboard instead of showing the bridged session.

Steps to Reproduce

1. Start Claude Code in VS Code terminal (v2.1.90)
2. QR code and bridge URL appear with "Connected" and "Attached" status
3. On iPhone, open bridge URL (claude.ai/code?bridge=env_...) in Safari or Chrome
4. Expected: Active session appears with real-time progress
5. Actual: Redirected to Claude Code dashboard showing only "新規セッション" and past sessions

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.90 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_