High memory usage warning shows heap size (7GB) instead of actual process memory (~1GB) on Windows

Environment: Windows 10, Claude Code (latest)

Issue:
The status bar shows "High memory usage (7GB)" but Task Manager shows the actual Claude Code process is only using ~1,015MB.

The 7GB appears to be Node.js heap allocation size, not actual memory usage. This is misleading — users may think there's a serious memory problem when actual usage is normal.

Suggestion:
Show actual process memory instead of (or in addition to) heap allocation size.