/mcp dialog does not display user-scoped MCP servers

Description

MCP servers added via claude mcp add <name> --scope user are not shown in the /mcp dialog, even though they connect successfully and their tools are available in the session.

Steps to Reproduce

1. Run claude mcp add falconer --scope user -- npx @falconer/mcp@latest
2. Start a new Claude Code session
3. Open /mcp dialog

Expected Behavior

The falconer server appears in the /mcp dialog with its connection status.

Actual Behavior

The server does not appear in the /mcp dialog at all, despite:

• Being present in ~/.claude.json under mcpServers
• Successfully connecting at session start (debug log: MCP server "falconer": Channel notifications skipped: server did not declare claude/channel capability)
• Its tools (mcp__falconer__create, mcp__falconer__edit, mcp__falconer__read, mcp__falconer__search) being available in the session

Environment

• Claude Code version: 2.1.81
• Platform: macOS Darwin 25.3.0 (arm64)