The status bar was incorrectly counting rigs and polecats due to:
1. Inconsistent witness session naming (gt-<rig>-witness vs gt-witness-<rig>)
caused "witness" to be counted as a rig name
2. Non-polecat sessions (witness, refinery, crew) were counted as polecats
Added extractRigFromSession() to handle all session naming patterns and
isPolecatSession() to properly identify actual polecat workers.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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