& prefix no longer triggers remote session after GitHub app install

Description

The & prefix in interactive Claude Code sessions no longer sends tasks to remote (Claude.ai web). Instead, the & prefixed message is passed through as a regular chat message to the assistant.

Steps to Reproduce

1. Start Claude Code interactive session (v2.1.47)
2. Type & <prompt> — it correctly prompted to install the Claude GitHub app
3. Install the Claude GitHub app on the repository
4. Type & <prompt> again — it no longer sends to remote, instead runs locally as a regular message

Expected Behavior

& <prompt> should send the task to Claude.ai as a remote web session.

Actual Behavior

& <prompt> is treated as a regular chat message and processed locally.

Workaround

claude --remote "<prompt>" still works correctly from the command line.

Environment

• Claude Code version: 2.1.47
• OS: Linux (Ubuntu)
• Git remote: SSH (git@github.com:...)
• Auth: logged out and back in, restarted Claude Code — issue persists