/ide command doesn't detect JetBrains IDE when running inside IDE terminal

Description

When running Claude Code from inside JetBrains Rider's integrated terminal, the /ide command shows "No available IDEs detected" even though the IDE integration is correctly configured and working.

Environment

• Claude Code version: 2.1.7
• IDE: JetBrains Rider 253.29346.144
• Plugin: Claude Code [Beta] (0.1.14-beta)
• OS: Windows

Evidence

The environment variables are correctly set by the plugin:

• CLAUDE_CODE_SSE_PORT=50256
• ENABLE_IDE_INTEGRATION=true

The SSE server is running and listening:

TCP    0.0.0.0:50256          0.0.0.0:0              LISTENING
TCP    [::]:50256             [::]:0                 LISTENING

Expected Behavior

The /ide command should detect that Claude Code is running inside a JetBrains IDE terminal and show the IDE as connected/available.

Actual Behavior

Select IDE
Connect to an IDE for integrated development features.

No available IDEs detected. Please install the plugin and restart your IDE:
https://docs.claude.com/s/claude-code-jetbrains

Enter to confirm · escape to cancel

Notes

The IDE integration likely works via the environment variables (haven't fully tested), but the /ide command's detection logic doesn't check for these environment variables, causing user confusion.