Add check_mcp_status Tauri command that detects whether the MCP server
is installed, Claude CLI is missing, or config needs setup. The status
bar shows a warning badge (MCP ⚠) when not installed, clickable to
trigger install. Also available via command palette "Install MCP Server".
Replaces useMcpRegistration with useMcpStatus which combines detection
and registration in a single hook.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>