The StackedMemoryBar component was incorrectly calculating segments when
Proxmox balloon was set to maxmem (no actual ballooning). In this case:
- balloon = total (e.g., 32GB)
- used = actual memory (e.g., 20GB)
- active = used - balloon = 20GB - 32GB = 0 (clamped)
- balloonPercent = 32GB/32GB * 100 = 100%
This caused the bar to always show 100% yellow (balloon) even when the
actual memory usage was much lower.
Fixed by only showing balloon segment when actual ballooning is in effect
(balloon > 0 && balloon < total). When there's no ballooning, the bar
now correctly shows used memory as green with the actual percentage.
Related to #788
aec63b7abd