The percentage was using (total - available) / total which excludes
reclaimable buffers/cache, but the displayed "Used RAM" value uses
mem.used which includes them. This mismatch showed 14% alongside
22 GB / 62 GB. Now uses mem.used / mem.total so the percentage
matches the displayed numbers.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>